Nicotinic receptors bind
A. acetylcholine and allow sodium ions to enter the cell.
B. acetylcholine and allow chloride ions to exit the cell.
C. norepinephrine and allow potassium entry, thereby exciting the cell.
D. muscarine and increase the contractility of intestinal muscle.
E. norepinephrine and can either stimulate or inhibit the cell.
Answer: A
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