PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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O2-and K+
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K+ and Na+
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Ca+2 and B+3
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Na+1 and Cl
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Detailed explanation-1: -[3][4] The Na+K+-ATPase pump helps to maintain osmotic equilibrium and membrane potential in cells. The sodium and potassium move against the concentration gradients. The Na+ K+-ATPase pump maintains the gradient of a higher concentration of sodium extracellularly and a higher level of potassium intracellularly.
Detailed explanation-2: -Active transport is the energy-requiring process of pumping molecules and ions across membranes against a concentration gradient. The sodium-potassium pump is an active transport pump that exchanges sodium ions for potassium ions.
Detailed explanation-3: -The sodium-potassium pump cycle The sodium-potassium pump transports sodium out of and potassium into the cell in a repeating cycle of conformational (shape) changes. In each cycle, three sodium ions exit the cell, while two potassium ions enter.
Detailed explanation-4: -The tunnel allows ions to cross. One of the channels shown allows Na+ ions to cross and is a sodium channel. The other channel allows K+ ions to cross and is a potassium channel.