NMDA receptors are blocked by _____ ions unless the membrane is depolarized.

Name: NMDA receptors are blocked by _____ ions unless the membrane is depolarized.
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NMDA receptors have a magnesium ion block that can only be removed when the membrane is sufficiently depolarized, allowing calcium influx. Sodium and potassium ions do not directly affect the magnesium block on the NMDA receptor. Although calcium does play a role in the activation of the receptor, it is not responsible for the magnesium block.

NMDA Receptors Are Blocked by _____ Ions Unless the Membrane