Motor commands are carried by __________ from the brain along the spinal cord.
A. both anterior and posterior roots
B. ascending tracts
C. spinal nerves
D. cranial nerves
E. descending tracts
E. descending tracts
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In males, the labioscrotal swellings form the
A. scrotum. B. scrotum and testes. C. scrotum and root of the penis. D. scrotum and dorsal side of the penis. E. scrotum and ventral side of the penis.
The membrane on the surface of a lung is called the
A) parietal pericardium. B) parietal pleura. C) visceral pleura. D) visceral pericardium.
A telomere is a type of hormone that controls the cell cycle
Indicate whether the statement is true or false
What is occurring when a muscle experiences an involuntary quick movement?
a. Twitch contraction. b. Tetanic contraction. c. Isotonic contraction. d. Isometric contraction.