The Book Refers to the Axon Membrane as a "Gatekeeper

question 114

Multiple Choice

The book refers to the axon membrane as a "gatekeeper." This means that the membrane:

• A) determines whether an action potential will pass through the axon.
• B) controls the balance of positive and negative ions in the interior and the exterior of the axon.
• C) operates in an all-or-none fashion: if it opens, neurotransmitters may pass through, and if it does not open, they may not.
• D) uses the nodes of Ranvier to allow some ions to move out of the axon and neurotransmitters to move into the axon.

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Definitions:

Elastic

Elasticity in economics refers to the responsiveness of demand or supply to changes in price or income.

Completely Inelastic

Describes a situation where the demand or supply for a good or service does not change in response to changes in price.

Inelastic

Describes a situation where the demand or supply for a good or service is relatively unresponsive to changes in price.

Elastic

Describes a situation in economics where the supply or demand for a good or service significantly changes in response to changes in price.