Hair cells of the cochlea are stimulated as a result of the up-and-down vibrations of which of the following?
A. The basilar membrane
B. The tectorial membrane
C. The vestibular membrane
D. The tympanic membrane
E. The otolithic membrane
A. The basilar membrane
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The pulmonary trunk divides into the
A. pulmonary veins. B. pulmonary arteries. C. right and left primary bronchi. D. right and left brachiocephalic veins.
What is the function of chordae tendineae?
a. Prevent the cusps of the AV valves from opening back into the atrium. b. Close the AV valves during systole. c. Generate force to push blood through the heart. d. Carry electrical signals through the ventricular myocardium
Multipolar neurons are ________.
A. always interneurons B. sensory neurons other than the ones for the senses of hearing, equilibrium, vision, and smell C. sensory neurons for the senses of hearing, equilibrium, vision, and smell D. always motor neurons E. either motor neurons or interneurons
White blood cells engulf bacteria by means of ________.
A. active transport B. cotransport C. phagocytosis D. pinocytosis E. receptor-mediated endocytosis