In Myelinated Axons

question 58

Multiple Choice

In myelinated axons

• A) potassium ions can diffuse into the axon only at sections that are myelinated.
• B) sodium ions can diffuse into the axon only at gaps in the myelin.
• C) sodium ions can diffuse out of the axon only at sections that are myelinated.
• D) All of the answer choices are correct.

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Definitions:

Genetically Predetermined

Describes traits or characteristics that are set by an organism's genetic makeup before birth.

Environmental Influences

Refers to the various physical, social, and cultural factors that shape an individual's development and behavior, such as climate, pollution, and societal norms.

Fat

A macronutrient composed of triglycerides that is used by the body for energy storage and insulation.

Cholesterol

A waxy substance found in the blood and cells of the body, necessary for the formation of cell membranes and certain hormones, but high levels can increase the risk of heart disease.