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Which of the following statements about leak ion channels is true?

A. Leak ion channels open in response to changes in the membrane potential.
B. Leak ion channels are always open.
C. Leak ion channels open in response to neurotransmitters or other channels.
D. Leak ion channels are closed until opened by specific signals.
E. All of these statements are correct.

Answer :

Final answer:

Leak ion channels are always open, allowing a constant flow of ions across the neuron's membrane. They are different from voltage-gated and ligand-gated channels which require specific triggers to open. The correct answer is option B.

Explanation:

The true statement about leak ion channels is that they are always open, which is option B. Leak channels are persistently open, similar to revolving doors that are never locked, allowing a constant flow of ions across the neuron's membrane. This is in contrast to other types of ion channels such as voltage-gated ion channels which open in response to changes in membrane potential, reaching a specific threshold, or ligand-gated channels which open due to the binding of a chemical like a neurotransmitter.

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