Which of the Following Occurs at an Excitatory Synapse

question 4

Multiple Choice

Which of the following occurs at an excitatory synapse

• A)There is increased permeability of the subsynaptic membrane to both Na⁺ and K⁺.
• B)A small hyperpolarization occurs.
• C)An action potential in the presynaptic neuron always causes an action potential in the postsynaptic neuron.
• D)The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K⁺ only.

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Definitions:

Opiate Drugs

Narcotic drugs derived from opium or opium-like compounds, used medically to relieve pain but can lead to addiction.

Tolerance

The process of becoming less responsive to a specific amount of a substance or stimulus after repeated exposure.

Dependence

A condition characterized by a physical or psychological need for a substance or behavior, often leading to compulsive use.

Legal Drugs

Substances that are permitted by law for sale and consumption, which can include prescription medications, over-the-counter drugs, and certain recreational drugs.