The ion primarily responsible for depolarization in pacemaker cells is ________, whereas the ion primarily responsible for this in other cardiac cells is ________.
A. K+; Na+
B. Ca2+; Na+
C. Ca2+; K+
D. Na+; Ca2+
Answer: B
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The speed of nerve impulse conduction depends solely upon the diameter of the axon.
Answer the following statement true (T) or false (F)
If you were to cut a cross section of the retina and examine it under a microscope, what would be the order of features from the choroid to the posterior cavity?
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The short-term controls of blood pressure, mediated by the nervous system and bloodborne chemicals, primarily operate via all but which of the following?
A) reflex arcs involving baroreceptors B) altering blood volume C) reflex arcs associated with vasomotor fibers D) chemoreceptors
Epimysium
A. surrounds individual muscles. B. separates muscle fibers. C. connects muscles to bone. D. is a type of muscle tissue. E. is a type of nerve tissue.