Spermatogonia divide by what process?
A. Mitosis
B. Meiosis
C. Both answers are correct.
D. None of these are correct.
Answer: A
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Answer the following statement(s) true (T) or false (F)
1. The spinal cord controls some ANS responses, particularly visceral reflexes. 2. Pre- and postganglionic neurons develop from the embryonic neural tube. 3. The autonomic nervous system carries out many somatic reflexes that are crucial to homeostasis. 4. Under normal circumstances, both divisions of the autonomic nervous system are active simultaneously. 5. Most autonomic efferent pathways involve one neuron.
Shelly has a hormone-secreting tumor of the adrenal gland. The tumor is causing her to have a deep voice, grow extensive body hair, and stop menstruating. This tumor probably involves cells of the
A) zona glomerulosa. B) zona fasciculata. C) zona reticularis. D) adrenal medulla. E) pars intermedia.
Vomiting, diarrhea, and flushing are caused by
A. a deficiency of iron. B. excess vitamin C. C. excess niacin. D. a lack of calcium.
A visceral motor neuron whose cell body is within the CNS is called a(n) ________ neuron
A) upper motor B) lower motor C) preganglionic D) postganglionic E) somatomotor