K⁺ Leak Channels Are Found in the Plasma Membrane

question 45

Multiple Choice

K⁺ leak channels are found in the plasma membrane.These channels open and close in an unregulated, random fashion.What do they accomplish in a resting cell?

• A)They set the K⁺ concentration gradient to zero.
• B)They set the membrane potential to zero.
• C)They disrupt the resting membrane potential.
• D)They keep the electrochemical gradient for K⁺ at zero.

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Definitions:

Tertiary Carbon

A carbon atom bonded to three other carbon atoms.

Secondary Carbon

A carbon atom that is attached to two other carbon atoms in an organic molecule.

Equatorial

Refers to the positions on a cyclic molecule that are more outwardly directed around the ring, often leading to reduced steric strain.

1,1,3-Trimethylcyclohexane

An organic compound consisting of a cyclohexane ring substituted with three methyl groups at the 1, 1, and 3 positions.