Bio 105 Quiz 2 Chapters 6-9
A nerve impulse can only travel backward
false
define Aqueous humor
fluid of the eyeball
When looking at objects up close what happens to the lens?
it contracts
What contains both sensory and motor neurons?
mixed nerve exp: sciatic
Somatic motor pathway has ___________ pathway
one neuron pathway
What are the visual receptors called and what do the do?
rods: detect light cones: detect color
What are the 2 type sensory neurons?
somatic: neurons in the skin, skeletal muscles, and joints. visceral: neurons from internal organs
What are the five types of taste receptors?
sweet, savory, salty, bitter, and sour
What two divisions does the ANS have?
sympathetic and para symapthetic they offen function in opposition to each other
osteocytes
the term meaning bone cells
An automnomic pathway has _______________ neuron pathways
two
Which direction do acsending tracts travel
up to brain
What sends impulses to and from the brain?
Spinal Cord
How many and which bones in the face are movable?
1 Mandible (lower jaw) only one
How many pairs of cranial nerves are there?
12 pairs
How many bones in the human body?
206
How many bones in the skull?
8 cranial and 14 Facial bones
Interneurons are only found where?
CNS
The nervous system has two divisions.
CNS: consists of the brain and spinal cord. PNS: cranial and spinal nerves.
what is the largest area of the brain?
Cerebrum
What is the name and location of the four sections of the vertebral column?
Cervical vertebrae (neck), Thoracic vertebrae (upper back), Lumbar vertebrae (lower back), sacrum(bottom of spine)
What are the 3 kinds of itch?
Chemical (poisen ivy), Mechanical (itchy fabric), pathological (experienced by people with kidney,disease, some cancers and hiv/aids)
bones continue to develop throughout __________________________
Childhood
What are the two types of bone tissue
Compact bone and Spongy Bone
What are three main functions of nervous system?
Detect changes and feel sensations, intiate appropriate responses to changes, organize infomation need for immediate use and store info for future use.
What happens to the lens when looking a distant objects?
Stretches
What are the three areas of the ear?
Outer, Middle, Inner
what is the fuction of the hypothalamus?
Production of antiduretic hormone and oxytocin, Stimulate releasing hormones of the putuitary gland, controls body temp and sweat and shiver response, regulates food intake, integration of the autonomic nervous system, stimulates appropriate responses such as anger, excitement, regulate body rythums
What are Dendrites and Axons wrapped with?
Schwann Cells: made up of layers of myelin sheath that insulate neurons from one another.
What is a joint?
Where two bones meet and articulate.
What is the function of a disc and what is it made of?
absorbs shock and permit some movement between vertabrae, its made of fibrous cartilege.
What are the three types of bones and other structures that make up the bones and joints of the skeletal system?
bone tissue cartilage fibrous connective tissue that forms the ligaments to connect bone to bone.
Name the 3 parts of every neuron,
cell body: contains the nucleus dendrites: transmit electrical impusles toward the cell body. axons: transmit impusles away from the cell body
The electrical impulse is carried across the synapse by what?
chemically by a neurotransmitter
Middle three pairs of ribs are called what?
False ribs
Last two pair of ribs are called what?
Floating ribs
What part of the body has the most receptors?
Hands and face
What factors affect bone growth and maintenance
Heredity, Nutrition, Hormones, chemical communication from other tissues, exercise or stress.
What are the two kinds of visceral sensations?
Hunger (adaptation occurs) Thirst (no adaptation)
Three classifications of joints are?
Immovable, slightly movable, and freely movable.
Fontanels
Soft spots on infants skull until 2 yrs old
What are the 4 classifications of bone
Long, short, flat, and irregular
Bone matrix
Made of calcium salts and collagen is non-living and constantly changing
Neuron
Nerve fibers or tissue
descending tracts
Travel away from the brain
True or False The purpose of the sensations is to enable the body to respond appropriately to ever-changing situationas and maintain homeostasis.
True
First 7 pairs of ribs in the rib cage are called what?
True ribs
