15). Ischemic cell change is caused by a lack of A. sodium ions. B. potassium io
ID: 10029 • Letter: 1
Question
15). Ischemic cell change is caused by a lack ofA. sodium ions.
B. potassium ions.
C. oxygen.
D. carbon dioxide.
16). Drugs that decrease membrane permeability to sodium
A. are used as local anesthetics.
B. prevent nerve impulses from passing.
C. cause a loss in the perception of pain.
D. All of the choices are correct.
17). The drug caffeine stimulates the activity of the nervous system by
A. exhausting the supply of neurotransmitters.
B. stabilizing neuron membranes.
C. lowering the thresholds at synapses.
D. interfering with the actions of sodium ions.
18). Amphetamines have stimulating effects on the nervous system because they
A. block the action of norepinephrine.
B. cause the release of norepinephrine.
C. block the normal uptake of norepinephrine.
D. increase the uptake of norepinephrine.
Explanation / Answer
15). Ischemic cell change is caused by a lack of
A. sodium ions.
B. potassium ions.
C. oxygen.
D. carbon dioxide.
16). Drugs that decrease membrane permeability to sodium
A. are used as local anesthetics.
B. prevent nerve impulses from passing.
C. cause a loss in the perception of pain.
D. All of the choices are correct.
17). The drug caffeine stimulates the activity of the nervous system by
A. exhausting the supply of neurotransmitters.
B. stabilizing neuron membranes.
C. lowering the thresholds at synapses.
D. interfering with the actions of sodium ions.
18). Amphetamines have stimulating effects on the nervous system because they
A. block the action of norepinephrine.
B. cause the release of norepinephrine.
C. block the normal uptake of norepinephrine.
D. increase the uptake of norepinephrine.
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