The myelin sheaths of CNS neurons are produced by ________.
A. Schwann cells
B. ependymal cells
C. oligodendrocytes
D. leukocytes
Answer: C
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To relieve a neckache, you swing your head in a circular motion around your shoulders. This movement where you swing your head circularly around a fixed point is an example of ________.
Fill in the blank(s) with the appropriate word(s).
Most neurons lack centrioles. This observation explains
A) why neurons grow such long axons. B) why such neurons cannot divide through mitosis. C) the conducting ability of neurons. D) the ability of neurons to communicate with each other. E) the longevity of neurons.
The release of water, acids, enzymes, and buffers by the digestive epithelium is called
A) digestion. B) secretion. C) excretion. D) absorption. E) ingestion.
In males, the ________ gene on the Y chromosome initiates male phenotypic development.
A. BPH B. HRT C. PSA D. AMH E. TDF