At an Excitatory Synapse

question 102

Multiple Choice

At an excitatory synapse,

• A)There is increased permeability of the postsynaptic cell 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)Both there is increased permeability of the postsynaptic cell to both Na⁺ and K⁺ and a small hyperpolarization occurs are correct
• E)None of the choices are correct

---

Definitions:

Homogeneous Catalysts

Catalysts that exist in the same phase as the reactants in a chemical reaction, facilitating the reaction without being consumed.

Same Phase

A term referring to substances that are in the same state of matter (solid, liquid, gas) under the same conditions.

Reactants

Initial compounds in a chemical reaction that are depleted as they contribute to the formation of the products.

Exothermic Reactions

Chemical reactions that release energy by light or heat.