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How many types of calcium ion channels are present on ER membrane?(a) 1(b) 2(c) 3(d) 4This question was addressed to me in homework.This question is from Cell Signaling and Signal Transduction in division Cell Signaling and Signal Transduction of Cell Biology

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Correct OPTION is (B) 2

Explanation: Two types of calcium channels are present on the membrane of endoplasmic reticulum – IP3 receptors and RYANODINE receptors. The latter are present primary in excitable CELLS like cardiac cells.



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