1) the concentration of a solution expresses the amount of
a) solvent per volume of solute.
b) solute per volume of solvent.
c) solvent per volume of solution.
d) solute per volume of solution.
e) none of the answers are correct.
2) the vitreous chamber of the eye
a) contains the lens.
b) helps to stabilize the structure of the eye and the retina.
c) contains blood vessels that nourish the retina.
d) is located between the lens and the iris.
3) in regard to lipids, the term unsaturated refers to
a) the lack of double bonds between adjacent carbon atoms in a fatty acid.
b) the presence of double bonds between adjacent carbon atoms in a fatty acid.
c) the ring structure of steroids.
d) glycerol, which acts as an anchor for joined fatty acids.
e) fats, such as butter and lard, which come from animal sources.
4) meghan thinks she has an abscessed tooth. if she does, what type of white blood cell
would you expect to see in elevated numbers in a differential count?
a) neutrophils
b) eosinophils
c) basophils
d) lymphocytes
e) monocytes
5) match the glial cell to the nervous system division in which it is found.
a. central nervous system
b. peripheral nervous system
schwann cells
6) match the type of receptor with the appropriate description.
a. chemoreceptors
b. touch receptors
c. thermoreceptors
d. nociceptors
the most studied examples of this type are phasic receptors called pacinian corpuscles.
7) the end of the plateau phase is due to the ________ of ca2+ channels and ________
of k+ channels.
a) opening, opening
b) closing, closing
c) opening, closing
d) closing, opening
8) the primary role of the carbonic acid-bicarbonate buffer system is
a) to buffer stomach acid.
b) to buffer carbonic acid formed by carbon dioxide.
c) the prevention of ph changes caused by organic and fixed acids.
d) to buffer the urine.
e) to increase the amount of carbonic acid during ventilation.
9)
10) the larger the receptive field, the
a) stronger the stimulus intensity required to activate a sensory receptor.
b) more primary sensory neurons synapse on a secondary sensory neuron.
c) fewer primary sensory neurons are involved.
d) larger the area of the somatosensory cortex in the brain that perceives the sensation.
11) epinephrine and norepinephrine increase ion flow through ________ channels.
a) na+ only
b) k+ only
c) ca2+ only
d) if only
e) if and ca2+
12) the hormone that regulates water excretion by the kidneys
a) decreases water permeability throughout the kidney tubules.
b) increases water permeability throughout the kidney tubules.
c) only decreases water permeability in certain portions of the kidney tubules.
d) only increases water permeability in certain portions of the kidney tubules.
13) the absolute refractory period of an action potential
a) only ensures one-way travel down an axon.
b) only allows a neuron to ignore a second signal sent that closely follows the first.
c) only prevents summation of action potentials.
d) ensures one-way travel down an axon and allows a neuron to ignore a second signal
sent that closely follows the first.
e) ensures one-way travel down an axon, allows a neuron to ignore a second signal sent
that closely follows the first, and prevents summation of action potentials.
14) cindy is taking 14 breaths per minute. her vital capacity is 3000 ml, her total lung
capacity is 4000 ml, and her tidal volume is 450 ml per breath. calculate the following:
a. cindy’s total pulmonary ventilation (minute volume)
b. cindy’s alveolar ventilation rate
15) bill does not begin puberty until he is 16. what effect would you predict this will
have on his stature?
a) bill will probably be taller than if he had started puberty earlier.
b) bill will probably be shorter than if he had started puberty earlier.
c) bill will probably be a dwarf.
d) bill will have bones that are denser than normal.
e) the late onset of puberty will have no effect on bill’s stature.
16) the volume of air moved in a single respiration is called the ________.
17) seasonal affective depressive disorder or sadd is a condition commonly seen in
northern climates of the united states and canada and it may be due to a decrease in the
amount of sunlight they receive during winter months. how is this condition related to
biological rhythms and what process is not being compensated for well enough?
18) mary, a nursing student, has been caring for burn patients. she notices that they
consistently show elevated levels of potassium in their urine and wonders why. what
would you tell her?
19) gh stimulates the secretion of ________ from the liver and other tissue. this
hormone has ________ feedback effect on growth hormone secretion.
20) the ________ gland sits along the superior border of the kidney.
21) describe what happens to nacl when placed in water.
22) reabsorption involves what two methods of transport? describe each. what
determines which route a solute will take?
23) premature babies frequently need to be put on a respirator to help them breathe.
why does this become a necessary treatment for many premature babies?
24) the mucosa of the majority of the digestive tract contains simple columnar
epithelium, while the esophagus and the anus have stratified squamous epithelium. why
is this the case? what purpose does each type of epithelium serve in the digestive tract?
25) a ________ is a compound that influences a postsynaptic cell’s response to a
neurotransmitter.