The relative refractory period occurs after the action potential is complete because of
a. the lingering inactivation of the voltage-gated Na+ channels
b. the slowness of the voltage-gated K+ channels
c. the action of the sodium-potassium pumps
d. both a and b
e. both b and c
D
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A) cardiac output B) stroke volume C) peripheral resistance D) blood pressure E) diastolic pressure
When B and T cells are fully developed and mature, they are described as being
a) Immunocompetent b) Pluripotent stem cells c) Primary lymphatic cells d) Specifically promoted e) Germ cells
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a. chief cells b. mucous cells c. parietal cells d. G cells
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A) first trimester B) second trimester C) third trimester