Why Does the Plant Alkaloid Nicotine Cause Skeletal Muscle Contraction

Multiple Choice

Why does the plant alkaloid nicotine cause skeletal muscle contraction?

A) Nicotine causes presynaptic action potentials.
B) Nicotine blocks postsynaptic nicotinic acetylcholine receptors.
C) Nicotine is an agonist at postsynaptic muscarinic acetylcholine receptors.
D) Nicotine is an agonist at postsynaptic nicotinic acetylcholine receptors.
E) Nicotine increases presynaptic calcium channel function, increasing transmitter release.