Anatomy quarter 1 exam
For the action potential of a nerve impulse to occur the stimuli has to reach a threshold of
-55mV
In the diagram of the year which structure would be known as the Eustachian tube
11
According to the rules of nines if a child burns both legs to the knee and a scalding hot bath then approximately what percentage of the patient's body surface is estimated to be affected
14%
You forget to put on sunscreen before going to the beach you end up getting a sunburn the sunburn is red and painful but appears to only have reached the epidermis which degree burn did you suffer
1st degree
Which type of burn is characterized by the epidermis and dermis being destroyed leaving scar tissue behind
3rd degree
In the diagram of the ear which of the following depicts the Tympanic membrane
4
According to the rule of nine if an adult has burns on the entire right side of the body arms and legs and a small portion of the chest region from a house fire and approximately what percentage of the patient's body surface area is estimated to be affected
40%
In the diagram of the year which of the following to pick the semicircular Canals
6
According to the diagram which number represents the hypodermis
8
A human cell containing 92 chromatids at metaphase of mitosis would produce two nuclei containing how many chromosomes in each new cell once mitosis is completed
92
Frontal section is
A
Which letter represents the abdominal body region known as the right hypochondriac
A
When an area of the skin is mechanically stressed, stem cells of the stratum germinativum divide more rapidly and the depth of the epithelium increases. This thicker area is known as____.
A callus
Myelin can be described as
A fatty material that surrounds the axon of a neuron
Which of the following correctly describes the structural arrangement of the cell membrane
A free-flowing bilayer of phospholipids with Proteins embedded loosely in bilayer
The partial negative charge at one end of a water molecule Is attracted it to the partial positive charge of another water molecule what is this attraction called
A hydrogen bond
An excitatory postsynaptic potential (EPSP) ______
A membrane changes by depolarizing which triggers an action potential
An inhibitory postsynaptic potential (IPSP)_____
A membrane changes by polarizing which triggers a resting potential
Which of the following best describes the class of molecules known as nucleotides
A nitrogen base a five carbon sugar and a phosphate group
Which describes apoptosis
A programmed cell death
It is advantageous for cells to be small because
A small cell has a small volume relative to surface area thereby increasing efficient transport
If you were a physician evaluating a young person who has conductive deafness which of the following would you consider and your differential diagnosis
A torn Tympanic membrane
The center for control of motor skills and posture is the structure labeled_____
AD
What is the body cavity that is labeled J and includes the stomach liver and intestine
Abdominal cavity
Annie is running swiftly toward the soccer goal what neurotransmitter is her body using to tell her skeletal muscles to contract
Acetylcholine
A patient visit a dermatologist the patient is affected by pus filled comedones Along his nose across his four head and throughout his back the patient is 13 years old what is your probable diagnosis
Acne
How does the Mylan sheath increase the speed of action potential activity
Action potentials occur only at the node of ranvier skipping the Mylan sheath
What type of tissue is seen on the slide
Adipose
Which pathway carries sensory information to the central nervous system
Afferent
Saturated fats are distinguished by____where as unsaturated fats are distinguished by____
All carbon atoms being joined with single carbon-carbon bonds; One or more double bonds occurring between carbon atoms
What type of skin graft involves the temporary transplantation of burned tissues with frozen skin from a cadaver
Allograft
The changing arrangement of the cells in this tissue type make it excellent for
Allowing stretching
A patient showing severe signs of dementia and periods of not remembering spouse children or knowing the year may likely be suffering from
Alzheimer's disease
When a protein is formed an amino acid combines together with another amino acid how are two amino acids attached together
Amino group to carboxyl group
Otitis media is ______
An infection of the middle ear
As shown in the diagram the centromere's uncouple and sister chromatids separate and move toward opposite poles of the cell which phase of mitosis is being described
Anaphase
Which choice describe the differences between an animal cell and plant cell
Animal cells have lysosomes and centrioles
What is the body region known as the lower arm and represented by I
Antebrachium
What is the body region represented by F
Antecubital
What are the specialized sweat glands found in the axillary and inguinal areas
Apocrine
What type of granular epithelium tissue would be found in the mammary glands which pinches off a portion of the cell with secretory vesicles
Apocrine
The type of sweat glands that may also function as scent glands are the
Apocrine gland
Which of the following tissues functions as a universal packing tissue and glue to hold organs in place resembles a cobweb
Areolar tissue
A curvature defect of the lens or cornea in which some parts of an image are in focus and the retina and other parts are blurred and vision is distorted is called
Astigmatism
Your neurons are dying because you are not getting enough oxygen and glucose your body slipped into a coma which neuroglia has malfunctioned
Astrocytes
In the diagram of the year what is the proper name for structure 1
Auricle
The division of the nervous system that controls your heart rate and blood pressure is the
Autonomic
What is the name for the structure labeled L on the neuron which relays the nerve impulses toward another neuron
Axon
5. The arrector pili muscle is represented by letter
B
At which point of the action potential graph depicts depolarization
B
Transverse section is
B
What is the abdominal body region that lives in the Center and includes the Naval
B
A dermatologist examines a patient with lesions on the face some of the lesions appear as shiny raised spots other are ulcerated with a beaded edge what is the diagnosis
Basal cell Carcinoma
The epidermal layer that contains one row of actively mitotic stem cells and may occasional include melanocytes is the stratum
Basale
Light is refracted when it passes_____within the eye
Between media of different optical density is at an oblique angle
The taste sensation are as humans evolutionarily adapted to be most sensitive to and why
Bitter taste because they can be poisonous substances
The diagram depicts what type of connective tissue
Blood
Your____is a type of connective tissue that transports your hormones nutrients and other materials all over your body
Blood
Dense elastic connective tissue forms parallel strands in
Blood vessels
Marfan's syndrome is an autosomal dominant genetic mutation for the coding of the protein fibrillin a Key component of connective tissue what aspect Is most likely with a person with Marfan syndrome
Blood vessels like aorta may rupture
When the body temperature rises above normal how do the blood vessels and sweat glands within the skin respond
Blood vessels relax and sweat gland activity increases
What type of tissue is illustrated in the diagram
Bone
What is the body region known as the upper arm and represented by G
Branchium
Which of the following statements is true about buffer solutions
Buffers tend to maintain a relative consistent pH
Mid sagittal section is
C
The sebaceous gland is represented by letter
C
The structure labeled______contain centers concerned with body temperature regulation and with salt and water balance
CD
Name two characteristics of carbohydrates
Carbohydrates contain C H & O with a one carbon two hydrogen one oxygen ratio Carbohydrates provide much of the energy that sells need
Which four elements make up approximately 96% of living matter
Carbon hydrogen Nitrogen & oxygen
What muscle tissue type is illustrated in the diagram
Cardiac
Which organ system transports nutrients metabolic wastes gases and defense cells
Cardiovascular
What is the classification for the part of the nervous system that includes the brain and spinal cord
Central nervous system
The area of the brain that is responsible for memory logic voluntary movement and higher level thinking is the_____
Cerebrum
Glands found in the external ear canal are called_______ glands.
Ceruminous
Olfactory receptors which provide the sense of smell are ________
Chemoreceptors
Who would you expect to be most at risk for developing the bone disease known as rickets?
Children born to mothers with dark skin living far from the equator
Which of the following parts of the ear helps translate sound into electrical signals
Cochlea
Connective tissue fibers that have great tensile strength and can be found and ligaments are
Collagenous fibers
Areolar tissue contains
Collagenous fibers, elastic fibers and gel-like ground substances
A general characteristic of connective tissue is that
Connective tissues stem from a common embryonic tissue called mesenchyme
What is the physiology Function of the retina
Contains the rods and cones photo receptors that send signals to the brain
What is the physiology function of the Iris
Contracts or dilate pupils to regulate the amount of light light into the eye
The strata of thick skin epidermis from superficial to deep are
Corneum lucidum Granulosum spinosum basale
The primary function of the____is to integrate motor sensory and cognitive performances between the cerebral hemispheres
Corpus callosum
What is the body cavity that is labeled B which would contain the brain
Cranial cavity
Which of the following depicts the cornea
D
A general function of the nucleic acid is that
DNA stores genetic information
Which of the following are present in both prokaryotic and eukaryotic cells
DNA, RNA, ribosomes and a cell membrane
_____Is the cytoplasmic extensions that provide the main receptive surface for the peripheral neuron which is labeled E
Dendrites
What type of connective tissue is illustrated in the microscope slide which was taken from the dermis of the skin
Dense irregular fibrous
Tendons and ligaments are composed primarily of_____
Dense regular connective tissue
What is a normal response to excessive loss of body heat in a cold environment?
Dermal blood vessels constrict
The pacinian corpuscles
Detect heavy pressure and vibrations on the skin
The nervous system_____(3)
Detects or senses changes in the internal or external environment Controls the movement of muscles Inner great information from several sources and uses the information to determine an appropriate response
From where do the cells of the epidermis obtain oxygen and nutrients?
Diffusion from blood vessels in the dermis
The wrist is____to the elbow
Distal
Eugene has gotten addicted to the thrill of gambling he keeps trying to replicate that rush by betting higher and higher amounts of money which neurotransmitter was involved in this type of behavior
Dopamine
What is the cavity that contains the cranial and spinal cavities
Dorsal cavity
What is the sequence from outermost to innermost layers of the meninges
Dura matter, arachnoid matter, Pia matter
The sweat gland is represented by letter
E
Which of the following depicts the lens
E
Which point of the action potential graph would a neuron be able to generate another nerve impulse or action potential
E
Small non-polar molecules such as carbon dioxide and oxygen____
Easily pass through the cell membrane
Which pathway is used to carry nervous signals from the brain to the muscles
Efferent
The diagram illustrates cartilage cells in the lacunae which is surrounded by extracellular matrix that contains many collagen fibers what type of cartilage is illustrated in the diagram
Elastic cartilage
Accessory structures of the skin, such as nails, originate from the_________
Epidermis
Which of the following spaces is found around the spinal cord but not around the brain
Epidural space
What is the abdominal body region that lives in the superior central portion and represented by E
Epigastric
In which cell type would you expect to find the most tight junctions
Epithelial cell lining digestive tract
Epithelial tissue is characterized by (2)
Epithelial tissue lacks blood vessels Epithelial tissue functions in secretion and absorption and excretion
Based on the structure and function of this tissue which location on the human body it would be ideal for taking a sample of this tissue
Esophagus
What structure is responsible for maintaining an equalizing pressure within the ear
Eustachian tube
What is the function of Cerebrospinal fluid
Exchanges nutrients and waste between the blood and the nervous tissue and provides a fluid cushion to the brain and nerves
_________ Is when the eyelids close in response to foreign objects touching the cornea
Eye blink reflex
Skin wrinkles with age because
Fat is lost from the subcutaneous layer and the dermis shrinks
What is the body region known as the thigh and represented by letter N
Femoral
The type of cartilage in intervertebral disks Of the vertebral column is
Fibrocartilage
A patient has had an abrupt personality shift and is being very impulsive she keeps slapping strangers she thinks looks shady she might have a tumor in what area of the brain
Frontal lobe of the cerebrum
Taste buds are located on the____of the tongue
Fungiform and circumvallate papillae
Which of the following to depicts the Sclera
G
Cells such as nerve cells that are in a non-dividing state are in which phase
G 0
Biochemical tests show a cell with replicated DNA but incomplete synthesis of proteins needed for cell division in which stage of the cell cycle with this cell most likely to be
G 2
What is the body region it represented by I or the rump area
Gluteal
_______ is an organelle with a cis and trans face which acts as the Packaging and secreting center of the cell
Golgi apparatus
Carbon______
Has the ability to bond covalently together to form long carbon molecules
Three functions of proteins
Help to fight disease Control the rate of reactants and regulate cell processes Build tissues such as bone and muscle
What type of granular epithelium would be found in sebaceous glands which causes the whole Cell burst and release the secretory vesicles
Holocrine
The tendency for physiological systems to stabilize internal conditions called
Homeostasis
The diagram illustrates cartilage cells in lacuane which are Surrounded By extracellular matrix containing fine collagen fibers what type of cartilage is illustrated in the diagram
Hyaline cartilage
The interior of the phospholipid by layer is
Hydrophobic
If the concentration of solutes In a cell is less than the concentration of solute in the surrounding fluid than the extracellular fluid is said to be
Hypertonic
A "shock absorber" and "insulator" function of the integumentary system is performed by the.
Hypodermis
The area of the brain that deals with homeostasis activities such as regulating body temperature of metabolism and contains the limbic system is the_____
Hypothalamus
What is the abdominal body region that lies to the left and right inferior portion is near the hips
Iliac
Where is Hyaline cartilage located
In the Larynx and the ends of long bones
What is the purpose of stratification or layering in epithelial tissue
Increase protection
Based on the structure of this tissue what would be possible functions of this tissue
Insulates the body, protect some organs by providing cushion, serves as a site for energy storage
What organ system would include the following growth structures skin hair and nails
Integumentary
What is the condition that signifies a liver disorder and is pheomelamin caused by membrane a buildup of bile in the blood and body tissue in which a persons skin tirns yellow?
Jaundice
Two characteristics of thin skin
Keratinized epidermal cells and contains sebaceous glands
According to the anatomical diagram the anatomical position of C is____to D
Lateral
Which Eye muscle moves the right Eye laterally away from the midline
Lateral rectus
Which abdominal body region would include the following organs stomach liver intestine and Spleen
Left hypochondriac
Through which area of the eye can the refraction of the light be varied
Lens
Microtubules structure and function
Long slender tubes of gobular protein; Form internal skeleton of cell
Farsightedness after the age of 45 is most likely caused by
Loss of lens elasticity
What body region is the lower back which is represented by G
Lumbar
What organ system protects the body by destroying bacteria and tumor cells this system would include the organs liver spleen and thymus
Lymphatic
Over time people aho migrated to the northern regions of earth devloped a light skin color because lighter skin provided an advantage to.
Make enough vitamin D
According to the anatomical diagram the anatomical position of D is____ to C
Medial
What area of the brain contains the vital centers for heart rate respiration and blood pressure
Medulla oblongata
A patient is concerned about skin cancer you examine a 7 mm mole on her leg the mole is circular and has some patches of red black and brown spread throughout the patient began lying in tanning beds last year and is 19 years old what is your diagnosis
Melanoma
Vesicles structure and function
Membranous sacs; Contains various substances that recently enter the cell
A patient has a severe high fever inability to handle bright light and swelling of the protective lining of the skull lumbar puncture to text bacteria present in the spinal fluid this patient most likely suffers from
Meningitis
endings that are present at the epidermal-dermal junction and are intimately associated with disc-like nerve that detect touch and are known as ______ cells
Merkel cells
The organelle that is a major producer of ATP is found in both heterotrophs and autotrophs is the
Mitochondria
Neurons that conduct impulses from the central nervous system to muscles or glands are
Motor neurons
What does the inferior oblique eye muscle do
Move the eye upward and away from the midline
Which of the four major types of membranes lines tubes and cavities that open to the outside of the body
Mucous membrane
___Is the most common type of neuron that possesses a single axon and many dendrites allowing for the integration of a great deal of information from other neurons
Multi polar
_____ Is an auto immune disease of the nervous system which targets the Mylan sheath and causes loss of signaling across the neuron
Multiple sclerosis
The golgi tendon organ is stimulated more when____
Muscle tension increases
Which organ system is directly involved with heat production
Muscular system
Went by the temperature rises a center in the brain initiates physiological changes to decrease the body temperature this is an example of
Negative feedback
Repolarization the sodium potassium pump is utilized the inside of an axon becomes more_____ as ______ ions flood outside the cell in order to return the Nerve cell back to its resting potential
Negative, potassium
The cell (labeled J) observed in the slide is protected and supported by the tiny cells surrounding it that appear like dots what are these cells
Neuroglial cells
Another name for pain receptors are______
Nocieptors
The structure labeled J on the nerve or the gaps between the Mylan sheath's are called _____
Nodes of Ranvier
Which body region is represented by A
Occipital
Which lobe of the cerebrum is responsible for vision
Occipital
Which cranial nerve controls the contraction of the circular muscles of the Iris
Oculomotor
Which cranial nerve is a motor nerve to the lateral rectus eye muscle to move the eye and associated with proprioceptors
Oculomotor
Which cranial nerve (labeled 8) receives sensory information associated with smell
Olfactory
The receptors for smell are located in the
Olfactory Epithelium
What are the star shaped specialized cells found in Rows along the axons of nerve cells which form myelin sheaths in the brain and spinal cord
Oligodendrocytes
Which cranial nerve (labeled 9) conducts sensory information associated with vision
Optic
What are the special cells that maintain the metabolism and to exchange nutrients and eliminate wastes (labeled a in the diagram)
Osteocytes
The pepsin enzyme
PH affect the structure of pepsin and trypsin and the activity rate of enzymes
Pressure receptors located deep in the dermis are called
Pacinian corpuscles
What is the double layered serious membrane sack that surrounds the heart which is labeled B
Parietal pericardium
What is the membrane that Lines the walls of the left and right thoracic compartments which is labeled G
Parietal pleurae
What is the body cavity that is labeled G which would contain the heart
Pericardial cavity
The rods are responsible for____where is the cones are responsible for____
Peripheral and dim light vision; High acuity color vision
What is the membrane or lining of the abdominal cavity
Peritoneum
Which organelle carries out diverse metabolic processes that break down fatty acids and produces hydrogen peroxide as a byproduct which it converts to water
Peroxisomes
Which of the following happens first after a scab forms?
Phagocytic white blood cells remove dead material
_______Is the study of the functions of the body structures
Physiology
Describe a lysosome
Plays a role in cellular digestion and degrade worn out cell components
What is the body cavity that is labeled H
Pleural cavity
Which body region is the depression in the back of the knee which is represented by K
Popliteal
3 major functions from human hair
Prevent entry of foreign particles into eyes ears and nose Protect scalp from UV radiation Detect or sense foreign debris such as insects on the body
Lacrimal glands____
Produce tears containing lysosome to protect the eye
As shown in the diagram the chromosomes begin to condense from chromatin and the spindle apparatus assembly forms what phase of mitosis is being described
Prophase
The brain barrier______
Protect CNS from foreign substances
An enzyme is defined as a
Protein that speeds up chemical reactions without being charged or depleted
Which portion of the cell membrane contributes to the selectively Permeability
Proteins
What is the function of eyebrows
Provide shade and prevent perspiration from reaching the eye
Which type of epithelial tissue is Depicted in the diagram
Pseudostratified ciliated Columnar
describes the order of a reflex arc
Receptor, sensory neuron, spinal cord, motor neuron, effector (muscle or gland)
The color receptors in the retina are most sensitive to light waves that are
Red green and blue
When an axon is in the middle of an action potential it can't respond to any other stimuli no matter how strong this is called the______ Which helps prevent signals from traveling in both directions down an axon at once
Refractory period
What is the function of the thalamus
Relay sensory input to the correct portion of the cerebrum
Facilitated diffusion
Requires a transmembrane protein
Which organ system removes carbon dioxide from the blood stream
Respiratory
Eccrine sweat glands__________
Respond primarily in elevated body tempture
____Tissue is a woven mass of fibers that provides the soft internal framework or stroma of the spleen lymph nodes and bone marrow to hold blood in place
Reticular
The salivary gland produce a large quantity of enzymes which are transported out of the secretory cells Which of the following organelles would be in abundance in the cells
Ribosomes
What is the structure labeled G which is responsible for making the myelin sheath in this peripheral neuron
Schwann cells
Acne is a disorder of an over active
Sebaceous gland
What is the oily secretion that lubricates the skin and hair is known as
Sebum
A burn patient reports that the burns on her hands and face are not painful but she has blisters on her neck and forearms in the skin on her arms is very red this burn would be classified as
Second degree
What function do fibroblasts serve in connective tissue
Secrete proteins that become fibers in the connective tissue matrix
A cochlear implant treats____
Sensorineural deafness
A patient who has a severe hemorrhage accidentally Receives a large transfusion of distilled water into a major blood vessels you would expect this mistake to have
Serious perhaps fatal consequences because the red blood cells would swell and burst
What type of epithelial tissue is depicted in the microscope slide below
Simple Columnar
Which type of epithelial tissue lines the sweat gland and is depicted in the diagram
Simple cuboidal
What type of epithelial tissue that Is depicted in the diagram which shows a single layer of flattened cells
Simple squamous
The tissue through which gases are exchanged between the blood and lung alveoli are ______
Simple squamous epithelium
What organ system would include the following growth structures ligaments and cartilage
Skeletal
Which organ system provide support and protection of soft tissue mineral storage and blood formation
Skeletal
Which type of muscle tissue are striated
Skeletal and cardiac
Which of the muscle types is best described as having long cynlindrical shaped cells Multinucleated and striations
Skeletal muscle
What is a vital function of the skin
Skin converts modified epidermal cholesterol to vitamin D
Anosmia is the loss of _____
Smell
What type of muscle tissue is illustrated in the microscope slide
Smooth
Which muscle tissue types are involuntary
Smooth and cardiac muscle tissue
Which Type of organelle is primarily involved in the synthesis of oils phospholipids and steroids
Smooth endoplasmic reticulum
What type of epithelial tissue is shown in the microscope slide
Stratified cuboidal epithelium
What type of epithelial tissue is depicted in the diagram
Stratified nonkeratinized squamous
What type of epithelial tissue is found in areas subject to considerable friction and abuse such as the esophagus
Stratified squamous epithelium
According to the diagram which of the following describes layer six
Stratified squamous epithelium and avascular
Which layers of the epidermis contain living cells
Stratum basale stratum spinosum stratum granulosum
According to the diagram What is the epidermal layer labeled 3
Stratum granulosum
The skin is____to the muscles
Superficial
According to the anatomical diagram the anatomical position of A is____to B
Superior
Which human eye muscle move the right eye upward
Superior rectus
Where would you find the epithelium tissue stratified cuboidal epithelium
Sweat glands or mammary glands
The division of the nervous system that is responsible for the Fight or flight response is the
Sympathetic
Tonya's pupils are dilating and her adrenaline is pumping as she walks onto the stage which division of the nervous system has most likely lead to this bodily response
Sympathetic
What is the junction between two nerve cells consisting of a minute gap across the impulse by diffusion of a neurotransmitter
Synapse
Of the four major types of membranes the one consisting of dense connective tissue overlyning loose connective tissue in the shoulder joint is ____
Synovial membrane
The glycoproteins and glycolipids of animal cell membranes are most important for
The ability of cells to recognize like and different cells
What determines the color of skin
The amount of melanin that melanocytes produce
One of the buffers that contribute to pH level in human blood is carbonic acid carbonic acid is a weak acid that disassociates into A bicarbonate ion and a hydrogen ion if the pH of the blood drops one would expect
The bicarbonate ion will act as a base and remove excess hydrogen ion with the formation of H2CO3
Where would you find the epithelial tissue shown in the diagram
The lining of the respiratory tract such as trachea
Elderly people may become less able to maintain stable body temperature because
The number of sweat glands diminishes
The blind spot is caused by
The optic nerve exiting the eye which contains no photoreceptors
What occurs if a Red blood cell is placed in a hypertonic solution
The red blood cell will swell and eventually burst
What is the body cavity that is the anterior space superior to the diaphragm
Thoracic cavity
Microfilaments structure and function
Tiny rods of protein; Aid in cellular movement
Which of the following describes the function of the ossicles within the ear
To amplify the vibrations produced by soundwaves entering the acoustic Meatus
Which of the following describes the function of the semicircular Canal's inside the ear
To maintain balance through position of bone called otoliths That stimulate hair cells
What is the significance of hyper polarization
To prevent electrical impulses from traveling backwards along the axon by increasing distance from the threshold potential
What is the purpose of the coronoid coat which is the middle layer labeled H
To provide nutrients to the retina, to prevent light from scattering, supplying oxygen to the eye
What type of epithelial tissue is depicted in the diagram and shows that sells can change shape
Transitional
The type of epithelium that lines the urinary bladder and many of the urinary passageways is
Transitional epithelium
The large cell at the center of the slide appears to have arms (labeled M) extending off of the cell these arms would be able to
Transmit electrical impulses or signals
The____separate the cerebrum from the cerebellum
Transverse fissure
When these two genes____are abnormal they cause cancer
Tumor suppressor and oncogenes
Elimination of excess water salts and waste products are functions of the______system
Urinary
What is the double layered serious membrane covering the heart which is labeled c
Visceral pericardium
Which of the following is the most abundant inorganic substance in the body
Water
Describe 3 properties of water that helps to sustain life
Water functions as a lubricant to reduce friction between body parts Water is a chemical reactant and plays a role in most of the metabolic reactions in the body Water has a high heat capacity allowing water to provide a stable thermal environment for organisms
Osmosis is defined as the movement of
Water molecules from a high concentration to the low concentration through a selectively permeable membrane
The function of skin include(3)
acting as a protective covering or barrier, excretion of waste, regulating body tempture
Shafts of hair are cells composed of
dead epidermal cells
You want to scratch your nose which of the following is the correct order that an electrical signal flows into an along a nerve
dendrite>cell body>axon>axon terminal>synapse
What are the three parts of a neuron
dendrites, cell body, axon
The hardness of a nail comes from ______
keratin
The dividing cells of a nail are located in the____
nail matrix
Fingerprints are caused by.
the genetically determined arrangement of dermal papillae The conspicuous epidermal ridges The sweat pores