Both potassium and sodium channels located along the nerve membrane are voltage-gated. This means that they respond to the changes in the voltage by opening and closing the gates to allow the ions to flow in or out of the membrane. When the threshold level is reached and depolarization occurs, how come only the sodium ions begin to rush in? a. The threshold levels for both sodium and potassium channels are equal, but sodium channels are slower to open. b. The threshold levels for both sodium and potassium channels are equal, but potassium channels take longer to open. c. The threshold level for the potassium channels is lower than the sodium channels. d. The threshold level for the potassium channels is higher than the sodium channels.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Both potassium and sodium channels located along the nerve membrane are voltage-gated. This means that they respond to the changes in the voltage by opening and closing the gates to allow the ions to flow in or out of the membrane.

When the threshold level is reached and depolarization occurs, how come only the sodium ions begin to rush in?

a. The threshold levels for both sodium and potassium channels are equal, but sodium channels are slower to open.
b. The threshold levels for both sodium and potassium channels are equal, but potassium channels take longer to open.
c. The threshold level for the potassium channels is lower than the sodium channels.
d. The threshold level for the potassium channels is higher than the sodium channels.
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