the stimulus. 14. When voltage regulated Na gates are open, a) the membrane expe

Question

the stimulus. 14. When voltage regulated Na gates are open, a) the membrane experiences an absolute refractory period; b) Na ions flow out; c) the Na/K pump temporarily deactivates; d) passive ion channels close; e the membrane experiences a relative refractory period. 15. Which one of the following statements would not normally be true immediately following an action potential? a) voltage regulated Na+ gates are closed; b) the Na /K pump works to restore ion concentrations; c) the membrane potential is slightly more positive than the normal resting potential; d) the concentrations of Na and are slightly altered; e) passive ion channels are open. 16. The site of action potential gene synaptic membrane; b) axon collateral; c) axon hillock; d) synaptic vesicle; e) telodendrium. 17. Propagation velocity would be highest in a nerve fiber with a) large diameter and a myelin sheath; b) small diameter and no myelin sheath; c) large diameter and no myelin sheath; d) small diameter and a myelin sheath; e) no nodes of Ranvier. Direct transmission of electrical impulses occurs at a) junctions; b) chemical synapses; c) synaptic clefts; d) gap junctions; e) voltage regulated gates. 18. neuromuscular

Explanation / Answer

14.(a) The membrane experience an absolute refractory period

15.

16.(c) Axon hillock

17.(a) large diameter and a myelin sheath

18.(d) gap junctions

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