A very thick connective tissue sheath, primarily composed of collagen fibers with scattered bands of elastic fibers, that blends into the surrounding tissues and assists in anchoring the blood vessel, is (the)
A) external elastic membrane.
B) media.
C) adventitia.
D) capillary wall.
E) None of the answers are correct.
C) adventitia.
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The ________ filters and relays sensory information to cerebral cortex
A) cerebrum B) thalamus C) pons D) medulla oblongata E) cerebellum
The relative concentrations of Na+and K+ remain constant during a single action potential despite movement of these ions across the membrane because
A) They cross back immediately through recovery channels. B) They are pumped back across using the Na+/K+ ATPase pump. C) They are forced back across the membrane as the action potential moves away. D) The refractory periods do not end until all ions have been returned to their original areas.
When a set of electrodes connected to a lightbulb is placed in a solution of dextrose and a current is applied, the lightbulb does not light up. When the same unit is placed in HCl, it does. Why?
What will be an ideal response?
Which is an alternate term for compact bone?
A. Cancellous bone B. Trabecular bone C. Spongy bone D. Diploe E. Cortical bone