Which of the following structures of the ear function(s) as (an) organ(s) in the sense of equilibrium?
A. Cochlea
B. Eustachian tube
C. Bony labyrinth
D. Vestibule and semicircular ducts
E. Pinna
Answer: D
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Postganglionic sympathetic axons are carried from the sympathetic trunk to the spinal nerve by the
A. pterygopalatine ganglion. B. splanchnic nerves. C. superior cervical ganglion. D. gray rami communicantes. E. white rami communicantes.
The beating of the cilia of the respiratory passages in the direction of the pharynx forms a ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following will increase the rate of diffusion?
A. An increase in the temperature B. An increase in the viscosity of the solvent C. An increase in the distance the molecules have to travel D. An increase in the molecular weight of the diffusing particles E. All of the choices are correct.
During spermatogenesis _______________________
A. the acrosome migrates towards the posterior end of the spermatid because its hydrolytic enzymes will be needed for digestion of the excessive cytoplasm around the flagella of the developing sperm B. the acrosome migrates towards the anterior end of the spermatid because its hydrolytic enzymes will be needed for penetration when the sperm contacts the egg during fertilization C. the acrosome migrates towards the anterior end of the spermatid because its pointy shape helps the sperm move more efficiently D. the acrosome migrates towards the posterior end of the spermatid because of its ability to propel the flagella moving the sperm through the female reproductive system towards the egg