Neurophysiology: practice question

The best answer is A, Acetylcholine. Motor neurons release acetylcholine at the neuromuscular junction, where it activates nicotinic receptors on the muscle end plate and initiates a muscle action potential leading to contraction.

Serotonin has central and gastrointestinal signaling roles.

Dopamine is important in central motor and reward pathways.

GABA is a major inhibitory neurotransmitter in the central nervous system.

It tests Neurophysiology in Physiology. The correct option holds because: Correct: acetylcholine mediates transmission at the skeletal neuromuscular junction.

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology questions on this site to test what stuck.

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.