The sympathetic division outflow that results in innervation of the pelvic organs has its spinal cord segment origin at
A. T10?L2.
B. T5?T12.
C. T1?T2.
D. T1?L2.
E. T1?T4.
Answer: A
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How do peripheral proteins contribute to the structure of the plasmalemma?
A) Some may function as catalysts or receptor sites to signal through the plasmalemma. B) Some form channels to permit passage of water molecules, ions, and small water-soluble compounds into and out of the cell. C) They form a structural element by being embedded in the plasmalemma. D) They are attached to only one side of the membrane. E) None of the answers are correct.
Tsh
a. is stimulated by thyrotropin-releasing hormone (TRH). b. is inhibited by T3 and T4. c. increases the rate of thyroid hormone secretion. d. promotes hypertrophy and hyperplasia of thyroid cells. e. all of these answers.
The structures of the female reproductive system that surround the openings to the urethra and vagina comprise the mons pubis.
Answer the following statement true (T) or false (F)
Which statement best describes the all-or-none principle?
A) An action potential happens completely, or it doesn't happen at all. B) All voltage-gated sodium channels will open or none will open. C) All neurons conduct an action potential together, or none do. D) Local, or graded, potentials will always become action potentials.