Which of the following statements correctly describes the motor end plate?
A)It contains receptor sites that are capable of binding curare.
B)It contains the neurotransmitter acetylcholine on its membrane.
C) It experiences an increase in permeability to cations when combined with acetylcholine.
D) It is a junction between two motor neurons.

Question

Quizplus · Accepted Answer

The motor end plate contains nicotinic receptors that bind with acetylcholine and cause an increase in permeability to cations such as sodium and calcium, leading to depolarization and muscle contraction. Choice A is incorrect because curare is a competitive inhibitor that blocks nicotinic receptors, preventing muscle contraction. Choice B is incorrect because acetylcholine is the neurotransmitter released by motor neurons at the motor end plate, not present on the membrane itself. Choice D is incorrect because the motor end plate is the junction between a motor neuron and a muscle fiber, not between two motor neurons.

Which of the Following Statements Correctly Describes the Motor End