The substance curare, which is used by native South Americans for poisoning the tip of arrowheads,
A) selectively blocks sodium channels.
B) selectively blocks potassium channels.
C) increases levels of acetylcholinesterase.
D) blocks acetylcholine receptors.

Question

Quizplus · Accepted Answer

Curare blocks acetylcholine receptors, preventing the neurotransmitter acetylcholine from binding to its receptors and causing muscle contraction. This leads to paralysis and is the reason why curare is used to immobilize animals during hunting.

The Substance Curare, Which Is Used by Native South Americans