What Happens to an Action Potential at an Excitatory Synapse

question 338

Multiple Choice

What happens to an action potential at an excitatory synapse

• A)The postsynaptic neuron depolarizes the presynaptic cell membrane.
• B)The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to both Na⁺ and K⁺.
• C)The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K⁺ only.
• D)A small hyperpolarization occurs.

---

Definitions:

Sister Chromatids

Duplicated DNA structures connected by a centromere, identical genetic information, formed during the S phase of the cell cycle.

Nuclear Envelope

A double-membrane structure that encloses the nucleus in eukaryotic cells, separating the contents of the nucleus from the cytoplasm.

Plasma Membrane

The lipid bilayer membrane that surrounds the cytoplasm of a cell, regulating the passage of substances in and out of the cell.

Sister Chromatids

Identical copies of a chromosome, connected by a centromere, produced during DNA replication and present in a cell prior to cell division.