At a neuromuscular junction
A)actin and myosin filaments slide past one another.
B)troponin and tropomyosin exchange places.
C)neurotransmitters are released.
D)intercalated discs are synthesized.

Question

Quizplus · Accepted Answer

At a neuromuscular junction, neurotransmitters (such as acetylcholine) are released from the synaptic terminal of a motor neuron, which then binds to receptors on the muscle fiber, leading to muscle contraction. Choice A refers to the sliding filament theory of muscle contraction, which occurs after the release of neurotransmitters. Choices B and D are not relevant to neuromuscular junctions.

At a Neuromuscular Junction