The NMDA receptor controls ________ that is normally blocked by ________.
A) the input to the hippocampus; presynaptic inhibition
B) a potassium channel; magnesium ions
C) the presynaptic membrane potential; GABA
D) a calcium channel; magnesium ions
E) a chloride channel; sodium ions

Question

Quizplus · Accepted Answer

The NMDA receptor controls a calcium channel that is normally blocked by magnesium ions. When the cell is sufficiently depolarized, the magnesium ions are expelled and calcium ions can enter the cell, leading to synaptic plasticity and long-term potentiation. Option A is incorrect because the NMDA receptor does not control presynaptic inhibition. Option B is incorrect because the NMDA receptor does not control a potassium channel. Option C is incorrect because the NMDA receptor does not control the presynaptic membrane potential or GABA release. Option E is incorrect because the NMDA receptor does not control a chloride channel or sodium ions.

The NMDA Receptor Controls ________ That Is Normally Blocked by ________

The NMDA Receptor Controls That Is Normally Blocked by