app practice questions
If oxygen is in a compound, what would its oxidation number be?
-2
Which option identifies a double replacement chemical reaction
BaCl2 + 2AgNO3 → 2AgCl + Ba(NO3)2 it exchanges compound element partners.
Which option identifies a decomposition chemical reaction?
CaCO3 → CaO + CO2 identifies a decomposition chemical reaction, as it contains a single reactant that is broken down into two.
Which of the following statements describes the process of endochondral ossification?
Chondrocytes continue to grow at the ends of the bone
Which option identifies a single replacement chemical reaction
Cu + 2AgNO3 → 2Ag + Cu(NO3)2 it contains a single free element that replaces or is substituted for one of the elements in a compound
The thymus is an endocrine system gland that secretes humoral factors. What does the thymus help an individual do?
Develop a healthy immune system
Mendel's First Law, monohybrid inheritance, is the cross between two parents with which of the following?
Different alleles for one gene
Telophase is the fourth and last stage of mitosis.
During this stage, the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.
Most digital balances use a counterbalance in which an electromagnetic coil floats in a magnetic field through which current flows. This mechanism is known as:
Electromagnetic force restoration mechanism
The laboratory glassware of choice for storing, mixing, and pouring chemicals is the:
Erlenmeyer flask
This is an unpaired skull bone that makes up one part of the orbit of the eye, separates the nasal cavity from the brain and is the bone located deepest within the head. It differs from the other bones in the cranium in that it is a spongy bone opposed to a hard bone.
Ethmoid bone
Which of the following means under the skin? Consider the word parts.
Hypodermic
Metaphase is the second stage of mitosis.
In this stage, the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere.
Anaphase is the third stage of mitosis.
In this stage, the sister chromatids separate into individual chromosomes and are pulled apart.
The term empirical data can best be defined as:
Information that is collected through one of the five senses
Which of the following is a property of an acid?
It releases hydrogen ions (H+) in solution
Testosterone is produced in males by______________ located between the seminiferous tubules in the testes.
Leydig cells
Which of the following is the weakest of all the intermolecular forces?
London dispersion forces
What part of the cell acts as the digestion center?
Lysosome The lysosomes break down nutrients and are responsible for all digestion that occurs within the cell.
Which of the following is/are molecular groups that form the basic structure of an amino acid?
NH2; COOH
Which of the following are the main information-carrying molecules of the cell?
Nucleic acid
The end of a muscle that is attached to a stabilized bone is referred to as the muscle's:
Origin
What kind of cell can live independently from other cells?
Prokaryotic
The type of empirical evidence that relates to non-measurable information is known as:
Qualitative evidence
The antidiuretic hormone is produced by the posterior pituitary gland. The antidiuretic hormone does which of the following?
Regulates the body's water balance
Which of the following is a secondary endocrine function of adipose tissue?
Regulating satiety
Which of the following best describes RNA?
Ribose nucleotides in strands of varying lengths
This is an unpaired skull bone that helps to make up part of the orbit of the eye and houses the pituitary gland.
Sphenoid bone
During which mitosis phase does the mitotic spindle vanish?
Telophase
In which stage of mitosis does cytokinesis become complete?
Telophase
Prophase is the first stage of mitosis. Which of the following best describes chromosomes during this stage?
The chromosomes are visibly separate
Which option best describes the term condensation?
The point at which vapor changes to gas or liquid
Temporal bones:
This is a paired set of skull bones located on either side of the head that encase the middle and inner ear. The temporal bones are crucial in the anatomy of the ear.
Parietal bones:
This is a paired set of skull bones that form the roof of and part of the sides of the skull. Each parietal bone is shaped roughly like a curved rectangle.
Occipital bone:
This is an unpaired skull bone at the back and bottom of the skull that contains a large oval hole (called the foramen magnum), which allows for the connection of the brain to the spinal cord.
Frontal bone:
This is an unpaired skull bone at the very front of the skull that helps to make up the forehead and the orbit of the eye.
What is the purpose of the arrector pili muscle?
To trap a layer of air
A small rounded process on a bone is called a:
Tubercle
Hyperdermic means
above the skin.
A transverse fracture occurs
across the long axis of a bone.
Both males and females produce small amounts of testosterone in the _____________________ gland?
adrenal glands
The liver produces the hormone
angiotensin which raises blood pressure by stimulating vasoconstriction
A molecule is a group of ____________?
atoms
The parathyroid gland controls
calcium and phosphorous levels.
Bones synthesize blood and immune cells, as well as store
calcium, phosphate, and lipids.
short bones
carpals and tarsals
The glycolysis phase of cellular respiration takes place in the
cell's cytosol.
order of life
cells, tissues, organs, organ system, organelles
An ion a positively or negatively __________________ ?
charged atom or molecule
Which of the following is an organized structure of DNA and protein found in cells?
chromosome
The thyroid gland is comprised of thyroid cells arranged into follicles. At the center of each follicle is a sticky fluid called: A
colloid
oxidation
combination of a substance w/ oxygen
A bone that sustains several breaks resulting in many small pieces between two large segments is said to be
comminuted.
There are two types of isotonic contractions:
concentric and eccentric.
Ligaments are what type of tissue?
connective
A lysosome is an organelle containing
digestive enzymes which it uses to function as the digestion and waste removal for cells, food particles, bacteria, etc.
DNA, deoxyribonucleic acid, is a
double-helix polymer and is found in all prokaryotic and eukaryotic cells.
The menses phase begins during the
early part of the follicular phase of the ovarian cycle, when progesterone, follicle-stimulating hormone (FSH), and luteinizing hormone (LH) levels are low.
__________________ Its principal functions are hormone production and internal communication and coordination.
endocrine system
The menses is the phase of the menstrual cycle during which the
endometrial lining is shed; it generally lasts from two to seven days, averaging five days, but can last longer.
Hypertrophy means an
enlargement of an organ
The ovaries produce
estrogen and progesterone.
Skeletal muscle fibers are organized into bundles called
fascicles
long bones examples are
femur, humerus
The sternum and ribs are what type of bone?
flat
The epicranius muscle raises one's eyebrows. Where is this muscle located?
forehead to galea aponeurosis
unpaired bones of the skull
frontal, occipital, sphenoid, ethmoid
An oxidizing agent, or oxidant, does which of the following?
gains electrons
The liver belongs to the _____ system
gastrointestinal
The gastrointestinal tract produces a hormone called
glucagon-like peptide 1 (GLP-1), which stimulates the beta cells of the pancreas to release insulin.
oxidizing agents include
halogens, potassium nitrate, and nitric acid.
The pancreas maintains
healthy blood sugar level
What is the term for individuals who have two identical alleles, such as AA or aa?
homogeneous
Which type of bond is formed when a hydrogen atom is attracted to a highly electronegative element?
hydrogen bond
A fracture in which one fragment is driven into the other is referred to as
impacted.
The hormone osteocalcin, produced by skeletal tissue, stimulates pancreatic beta cells to
increase production of insulin.
What is the primary purpose of catalysts?
increase rate of reaction
What is an atom called if it is electrically charged?
ion
A spiral fracture
is one that results from a twisting motion
When a muscle produces tension without changing the angle of the skeletal joint, the contraction is said to be
isometric.
When the tension in a muscle stays constant, the contraction is said to be
isotonic
Adipose tissue produces hormones involved in
lipid metabolism and storage, including leptin, which is released into circulation when you consume food and binds to receptors in the brain to trigger the satiety response.
The smooth endoplasmic reticulum (SER) function involves manufacturing and packaging, including the synthesis of
lipids and hormones which are used for the production of new cellular membranes.
condensation
liquid / solid deposition from vapor
vaporization
liquid / solid phase into gaseous phase
Freezing is the point at which
liquid changes to a solid
Boiling is the point at which
liquid changes to vapor
A volumetric flask has a
long neck that widens out to a bulb at the bottom.
The body system responsible for draining interstitial fluid and placing it into the bloodstream is the:
lympathic system
Congenital
means from birth.
Prolactin helps stimulate
milk production.
In males, testosterone regulates
muscle development, bone growth, development of secondary sex characteristics, and libido.
Eccentric contraction occurs when the
muscle tension decreases while the muscle lengthens. An example would be a reverse biceps curl, whereby a weight is slowly lowered in a controlled manner, releasing tension from the biceps brachii as the angle of the elbow joint increases.
When measuring the diameter of a virus, which unit of measure is most appropriate?
nanometer
Which type of tissue makes up the structure of the spinal cord?
nervous
Which of the following is the location in which protons and neutrons are found?
nucleus
Quantitative evidence is collected through
numerical means and can be mathematically analyzed. It is considered to be unbiased.
An oblique fracture
occurs at an angle other than 90 degrees.
An open fracture is
one in which at least one end of the broken bone breaks through the skin.
A closed fracture is
one in which the overlying skin remains intact.
An organism is composed of which of the following?
organ systems
The type of bone cell that forms new bone tissue in the growing
osteoblast
The microscopic structural unit of compact bone is called a/n:
osteon
paired bones of the skull
parietal and temporal
A finger contains three bones, which are known as
phalanges The phalanges also form the toes.
The major glands in the endocrine system are the
pineal hypothalamus pituitary thyroid parathyroid thymus adrenal pancreas ovaries testes.
Thrombopoiesis is the process in which
platelets are produced within bone marrow.
The volumetric flask is designed to contain a
precise volume of liquid at a particular temperature.
Evaporation
process when an element or compound transitions from liquid state to its gaseous state below boiling point.
Pluripotent stem cells are primitive cells that can
produce another cell identical to itself and can generate subsets of mature cells.
Atoms are composed of three particles, which include all
protons, electrons, and neutrons
Erythropoiesis is the production of
red blood cells.
The adrenocorticotropic hormone helps an individual
reduce stress
hypotrophy means the reduction of an organ
reduction of an organ
The antidiuretic hormone helps
regulate the body's water balance.
The function of lysosomes is to
remove waste as well as destroy a cell after it has died, called autolysis.
The number of people used in a study is the experiment's _______.
sample size
The endocrine system is a set of organs that
secrete hormones directly into the circulatory system
single covalent bond
share one pair of electrons
double covalent bond
shares 2 pairs of electrons
Concentric contraction involves the
shortening of a muscle in order to move a load. This happens with a biceps curl exercise, whereby the biceps brachii muscle contracts and shortens to decrease the angle of the elbow to lift the weight.
Which body system stores minerals such as calcium?
skeletal system
A colloid is a solution in which the solute particles are made up of
small clusters of molecules that are large enough to scatter light so they lend an opaque appearance to the solution while still remaining in solution.
The uterus is an example of what type of tissue?
smooth muscle
Melting is the point at which
solid changes to liquid.
Each hair root has an arrector pili muscle that responds to signals generated by the sympathetic nervous system. In cold conditions, the arrector pili contracts and makes the hair ___________________ ?
stand up.
Females produce small amounts of ______________________ in the ovaries
testosterone
A greenstick fracture is one
that affects only one side of the bone.
The moveable end of the muscle that attaches to the bone being pulled is referred to as
the muscle's insertion point
The plasma membrane that surrounds muscle fibers is called
the sarcolemma.
Muscle fibers contain a specialized type of smooth endoplasmic reticulum that stores, releases, and retrieves calcium ions called
the sarcoplasmic reticulum.
autolysis
the spontaneous breakdown of cells as they self-digest
Which of the following is a property of fatty acids?
they form emulsions
Together with all the other hairs, arrector pili creates the effect of
trapping a layer of air close to the skin to act as insulation and prevent the loss of body heat.
A covalent bond is formed when
two atoms share one electron from each atom.
An ionic bond is formed when
two oppositely charged ions are electrostatically attracted.
Hematopoiesis is the process of developing
various blood cells from pluripotent stem cells.
irregular bones
vertebrae and facial bones
Flat bone examples include...
vomer, Ribs, shoulder blades, hipbones, and cranial bones
Which option identifies a synthesis chemical reaction
2S + 3O2 → 2SO3 contains two reactants that are uniting to form a single product
females contain about ____________________ liters.
4-5
Males contain about ___________ liters
5-6
Blood represents about __% of total body weight
8% of an adult's body weight