Multiple Choice
Which of the following membrane ion channels in the neuron are always open?
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11. Nervous Tissue and Nervous System
Ions - Sodium and Potassium
Multiple Choice
Which of the following statements best describes the resting membrane state in the neuron?
A
Only the voltage-gated K+ are closed.
B
All of the voltage-gated Na+ and K+ channels are closed.
C
Only the voltage-gated K+ channels are open.
D
Only the voltage-gated Na+ channels are closed.
E
Only the voltage-gated Na+ channels are open.
Verified step by step guidance1
Understand the concept of the resting membrane potential in neurons, which is the electrical potential difference across the neuron's plasma membrane when the neuron is not actively sending a signal.
Recognize that during the resting state, the neuron's membrane is polarized, meaning there is a difference in charge between the inside and outside of the cell.
Identify the role of ion channels in maintaining the resting membrane potential. Specifically, focus on the voltage-gated Na+ (sodium) and K+ (potassium) channels.
Recall that during the resting state, the voltage-gated Na+ and K+ channels are typically closed. This prevents the movement of these ions across the membrane, helping to maintain the resting potential.
Conclude that the statement 'All of the voltage-gated Na+ and K+ channels are closed' best describes the resting membrane state in the neuron, as it reflects the condition necessary to maintain the resting membrane potential.
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