The Depolarization Phase of an Action Potential Is Punctuated by the Closing

question 45

Multiple Choice

The depolarization phase of an action potential is punctuated by the closing of inactivation gates in the voltage gated sodium ion channels.All of the following are consequences of this inactivation except one.Choose the statement below that is not a consequence of the closing of inactivating gates.

• A) This allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell.
• B) This allows for the one way transmission of action potential down the axon.
• C) This limits the frequency of action potentials down the axon.
• D) This stops the depolarization of the axon membrane.

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Definitions:

Mammalian Nephrons

The functional units of the kidney in mammals, responsible for filtering blood to produce urine, regulating water, and soluble substances in the blood.

Glomerular Filtration

Protein-free plasma forced out of glomerular capillaries by blood pressure enters Bowman’s capsule.

Plasma

Fluid portion of blood.

Blood

Circulatory fluid of a closed circulatory system. Of vertebrates, fluid connective tissue consisting of plasma and cellular components (red cells, white cells, platelets) that form in bones.