The myogenic mechanism for autoregulation of vascular smooth muscle tone:
A. requires the release of nitric oxide from endothelial cells
B. involves the release of norepinephrine from sympathetic nerve endings
C. responds to changes in vessel wall transmural pressure
D. depends upon changes in flow through the vessel
E. arises from changes in shear stress in the vessel wall
ANS: C
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The figure illustrates muscles of the anterior surface of the body. What does "D" represent?
A. Deltoid B. Pectoralis major C. Coracobrachialis D. Biceps brachii E. Serratus anterior
As a result of hyperventilation,
A. the body pH decreases. B. the plasma PCO2 level decreases. C. the kidney will increase the rate of hydrogen ion excretion. D. more bicarbonate ions are added to the plasma. E. the plasma PCO2 level increases.
Which layer of the GI tract is composed of areolar connective tissue containing blood and lymph vessels?
a) Mucosa b) Lamina propria c) MALT d) Muscularis e) Epithelium
The perilymph is:
a. inside the semicircular canal b. inside the cochlea c. inside the bony labyrinth d. both A and B above