There are ________ pairs of spinal nerves.
A. 62
B. 31
C. 35
D. 12
E. 24
Answer: B
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Limited branching of preganglionic axons allows for
A. mass activation. B. local and discrete activation. C. rapid changes in numerous structures at once.
The triad, seen as structure D, is composed of
A) the T tubules and the myofibrils.
B) actin and myosin.
C) troponin and tropomyosin.
D) the cisterna of the sarcoplasmic reticulum along with the T tubules.
E) the cisterna of the sarcoplasmic reticulum and the myofilaments.
The greatest percentage of Na+ reabsorption takes place in the
a. proximal tubule b. loop of Henle c. distal tubule d. collecting tubule e. renal pelvis
Neurons have
A) a cell body and collagen fibers. B) connective tissue membranes surrounding them. C) striations and intercalated discs within their cell body. D) cilia along their cell membranes. E) a cell body, dendrites, and an axon.