Which of the Following Statements About Voltage-Gated Channel Proteins Is

question 64

Multiple Choice

Which of the following statements about voltage-gated channel proteins is true?

• A) If the membrane voltage reaches threshold potential, ions are pumped through the membrane.
• B) If the membrane voltage reaches threshold potential, ions can diffuse through the membrane.
• C) Ions can move through the membrane only if the overall membrane voltage stays the same.
• D) Ions are pumped through the membrane in order to maintain existing membrane voltage.
• E) When the gates close, membrane voltage does not change.

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Definitions:

Vestibule

An entrance or enclosed area leading to other spaces; in anatomy, it refers to spaces within the inner ear and other organs.

Stereocilia

Hairlike projections on the surface of certain cells, such as those in the inner ear, involved in mechanosensing.

Dynamic Equilibrium

A state of balance between continuing processes, often referring to the balance of substances in a biological system or to the balance of forces in a mechanical system.

Gelatinous Mass

A jelly-like substance, often found in the body as part of various structures or tissues.