The process of spermatogenesis and spermiogenesis begins with a ________ and ends with four ________.
A. sperm cell; interstitial cells
B. germ cell; gametes
C. sperm cell; nurse cells
D. secondary spermatocyte; germ cells
E. secondary spermatocyte; spermatocytes in general
Answer: B
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Mechanoreceptors that respond to changes in blood pressure are called
A) nociceptors. B) baroreceptors. C) chemoreceptors. D) proprioceptors. E) thermoreceptors.
Near the external auditory meatus, the long, sharp process called the ________ process is an attachment site for ligaments that support the hyoid bone.
A) mastoid B) styloid C) occipital D) condyloid E) temporal
Neurons that play a major role in the sleep-wake cycle are found in
a. the hypothalamus b. the brain stem c. the cerebellum d. all of the above e. both a and c
After acetylcholinesterase (AChE) acts, the presynaptic neuron:
A) reabsorbs the acetate. B) reabsorbs synaptic vesicles. C) reabsorbs acetylcholine. D) reabsorbs the choline.