Where are unmyelinated nerve fibers surrounded by Schwann cells?
A. In the CNS
B. In the PNS and CNS
C. In the PNS
D. Nowhere. Unmyelinated nerve fibers are never surrounded by Schwann cells.
Answer: C
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Which of the following statements is/are true?
A. Pennate muscles are capable of producing more tension per unit of cross-sectional area than parallel muscles. B. Parallel muscles are capable of producing more range of motion than pennate muscles. C. Both A and B are true. D. Neither A nor B is true.
The spermatids:
a. are direct daughter cells of the spermatogonium b. are direct daughter cells of the secondary spermatocytes c. contain 23 chromosomes d. both B and C above
Motor neurons, whose axons constitute the somatic nervous system, supply ____________________ muscles and bring about movement
Fill in the blank(s) with correct word
An increased mean corpuscular hemoglobin concentration is termed
A) anemia. B) polycythemia. C) hyperchromic. D) macrocytic. E) reticulocytosis.