Which is caused by acetylcholine through nicotinic receptors_____________?
Correct answer: A. Contraction of skeletal muscle
- A. Contraction of skeletal muscle
- B. Decrease of heart rate
- C. Secretion of saliva
- D. Contraction of pupils
Explanation
Acetylcholine acting on nicotinic receptors at the neuromuscular junction produces an end-plate potential that triggers skeletal-muscle contraction. Cardiac slowing, salivation and pupillary constriction are mediated mainly through muscarinic receptors.
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