Myelin sheaths in the CNS are formed by which of the following cells?
A. Microglia
B. Ependymal cells
C. Schwann cells
D. Astrocytes
E. Oligodendrocytes
E. Oligodendrocytes
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Up-regulation of receptors
A) Results in increased sensitivity to its ligand. B) Results in decreased sensitivity to its ligand. C) Occurs when a ligand has been present at high levels. D) Both B and C
Soft spots in the infant skull located near the "temples" on the lateral side of the head are called ________.
Fill in the blank(s) with the appropriate word(s).
During expiration, the alveolar pressure must be
A. greater than atmospheric pressure. B. greater than pleural pressure. C. less than atmospheric pressure. D. equal to atmospheric pressure. E. None of these choices is correct.
What regions of the hip bones articulate to form a symphysis?
A. Right and left pubic tubercles B. Ischial tuberosities C. Right and left Iliac fossa D. Right and left pubic bodies