Under most conditions, NMDA receptors do NOT respond to their neurotransmitter because:
A) magnesium ions block the passage of calcium through the receptor's channel.
B) too many sodium ions enter through the AMPA channels.
C) any recent depolarization of the membrane inactivates the NMDA receptors.
D) the channel can open only when the potassium concentration inside the neuron exceeds a certain high level.

Question

Quizplus · Accepted Answer

NMDA receptors are blocked by magnesium ions under most conditions, preventing calcium from passing through the channel and activating the receptor.

Under Most Conditions, NMDA Receptors Do NOT Respond to Their