This figure compares the organization of the somatic motor system and the autonomic nervous system. Identify structure "A" on the above diagram.
A. Autonomic ganglion
B. Postganglionic neuron
C. Somatic motor neuron
D. Effector organ (smooth muscle of GI tract)
E. Preganglionic neuron
Answer: C
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Intracellular fluids have high concentrations of
A. sodium and phosphate ions. B. potassium and phosphate ions. C. sodium and chloride ions. D. chloride and potassium ions.
Which of the following most accurately describes the actions of aldosterone?
A. Aldosterone increases Na+ secretion and K+ reabsorption in the cortical collecting ducts. B. Aldosterone increases Na+ reabsorption and K+ secretion in the proximal tubule. C. Aldosterone decreases Na+ reabsorption and K+ secretion in the cortical collecting ducts. D. Aldosterone increases Na+ secretion and K+ reabsorption in the proximal tubule. E. Aldosterone increases Na+ reabsorption and K+ secretion in the cortical collecting ducts.
Nitrogenous waste in the blood is the result of:
a. fat catabolism b. protein catabolism c. carbohydrate catabolism d. nucleic acid catabolism
Which type of muscle fibers would be utilized for short periods of moderate activity such as jogging?
A. Intermediate-twitch fibers B. Medium-twitch fibers C. Slow-twitch fibers D. Fast-twitch fibers