Which of the Following Best Describes the Firing of a Neuron

question 130

Multiple Choice

Which of the following best describes the firing of a neuron (action potential) ?

• A) a change in axonal membrane permeability facilitating an inflow of positive ions
• B) an electrical current initiated in the cell body which flows the length of the axon
• C) the opening of ion channels, promoting a negative charge within the axonal membrane
• D) the transmission of neuronal impulses across the synaptic cleft

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Definitions:

Hyponatremia

A condition characterized by low concentrations of sodium in the blood.

Tetany

A condition characterized by severe muscle cramps and spasms caused by an imbalance in calcium levels or other electrolytes in the body.

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Glands of the endocrine system that release hormones directly into the bloodstream to regulate bodily functions.

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A pair of organs located in the abdominal cavity, responsible for filtering waste from the blood and producing urine.