The plasma membrane Ca^2+ -ATPase is a pump that functions in the primary active

Question

The plasma membrane Ca^2+ -ATPase is a pump that functions in the primary active transport of Ca^2+ out of the cell. What features do you expect of this pump and the cellular environment? Choose all that apply. Check All That Apply It transports Na^+ and K^+ lons It is an antiporter The extracellular Ca^2+ concentration is higher than the Intracellular Ca^2+ concentration it hydrolyzes ATP It is capable of undergoing a conformational change The affinity for Ca^2+ is low when the pump is bound to phosphate It transports Ca^2+ down its concentration gradient

Explanation / Answer

Explanation:

Ca2+ ATPases catalyze ATP-dependent transport of Ca++ away from the cytosol. The calcium ATPase reaction cycle is associated with conformational changes. It function to keep cytosolic [Ca2+] low, allowing Ca2+ to serve as a signal.

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