1) match the condition with the description.
a. acromegaly
b. adrenogenital syndrome
c. cretinism
d. dwarfism
e. exophthalmus
caused by growth hormone deficiency in childhood
2) which of these has a higher concentration in cerebrospinal fluid than in the blood?
a) k+
b) h+
c) ca2+
d) hco3-
e) na+
3) when blood pressure is normal, the receptors in arterial walls fire action potentials
a) very seldom.
b) continuously.
4) motor units that control skeletal muscles involved with fine motor movements (eye
muscles or the hands) have ________ muscle fibers than motor units that control more
gross movements (gastrocnemius muscle of the lower leg).
a) more
b) fewer
c) the same number of
5) indifferent gonads develop into testes under the influence of
a) androgens.
b) estrogens.
c) peptide or protein hormones.
d) none of the answers are correct.
6) each of the following is a primary tissue type except one. identify the exception.
a) muscle tissue
b) neural tissue
c) osseous tissue
d) connective tissue
e) epithelial tissue
7) the highest frequency sound is detected by
a) unique hair cells located anywhere along the basilar membrane.
b) hair cells located near the middle of the basilar membrane.
c) hair cells located near the oval window end of the basilar membrane.
d) hair cells located near the helicotrema end of the basilar membrane.
e) the frequency at which the stereocilia vibrate.
8) the binding of acetylcholine to its receptor at the neuromuscular junction causes the
opening of a
a) na+ channel.
b) channel for both na+ and k+.
c) calcium channel.
d) ryanodine receptor.
9) when a second epsp arrives at a single synapse before the effects of the first have
disappeared, what occurs?
a) spatial summation
b) temporal summation
c) inhibition of the impulse
d) hyperpolarization
e) decrease in speed of impulse transmission
10) simplest cell-cell junction
a. gap junction
b. tight junction
c. anchoring junction
11) match the symbol with the correct element:
a.p
b.na
c.ca
d.c
e.k
f.pb
1> calcium
2> carbon
3> potassium
4> phosphorus
5> lead
6> sodium
12) the release of neurotransmitter from a vestibular hair cell into the synapse with a
sensory neuron would increase
a) in response to any mechanical stimulation of the hair cell.
b) when the stereocilia of the hair cell are displaced away from the kinocilium.
c) when the stereocilia are equally displaced to either side of the kinocilium.
d) when the stereocilia of the hair cell are displaced toward the kinocilium.
13) voltage-gated (voltage-dependent) channels and antiport carriers are both types of
a) structural proteins.
b) enzymes.
c) transporters.
d) receptors.
14) dan has been lost in the desert for two days with very little water. as a result, you
would expect to observe
a) elevated adh levels.
b) decreased blood osmolarity.
c) normal urine production.
d) increased blood volume.
e) cells enlarged with fluid.
15) when blood pressure receptors sense a loss of blood pressure, they ________ their
firing rate.
a) increase
b) decrease
16) cyclic amp activates
a) a g protein.
b) adenylyl cyclase.
c) protein hormones.
d) protein kinase a.
e) hormone receptors.
17) glial cells
a) only provide structural and metabolic support.
b) only guide neurons during growth and repair.
c) only help maintain homeostasis of the brain’s extracellular fluid.
d) provide structural and metabolic support and help maintain homeostasis of the brain’s
extracellular fluid.
e) all of the answers are correct.
18) histamine’s primary role in the respiratory system is as a
a) surfactant.
b) bronchodilator.
c) bronchoconstrictor.
d) vasodilator.
e) vasoconstrictor.
19) the membrane proteins that bind to a ligand and act in the body’s chemical signaling
system are ________.
20) what is the difference between a peer-reviewed article and a review article?
21) rna is usually ________ -stranded.
22) how would the process of red blood cell production be affected by constricting the
arteries that supply blood to the kidney? explain your answer. name three other
situations that would similarly affect the process of red blood cell production.
23) ________ is a hormone secreted by both the sertoli cells of the testes and the
granulosa cells of the ovaries.
24) you are studying the toxic effects of a newly discovered tropical plant extract. from
preliminary studies, it appears that the toxin prevents h+-dependent membrane
transport. explain which digestive processes may thus be impaired.