(A) : Energy is required for sodium-potassium pump
(R) : Hydrolysis of adenosine triphosphate to adenosine diphosphate releases energy in cells

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Both A and R are true, R explains A properly

Both A and R are true, R does not explain A

A is true, but R is false

A is false, but R is true

answer is A.

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Detailed Solution

SODIUM-POTASSIUM PUMP :also known as the Na⁺/K⁺ pump or Na⁺/K⁺-ATPase, this is a protein pump found in the cell membrane of neurons (and other animal cells). It acts to transport sodium and potassium ions across the cell membrane in a ratio of 3 sodium ions out for every 2 potassium ions brought in. In the process, the pump helps to stabilize membrane potential, and thus is essential in creating the conditions necessary for the firing of action potentials.

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