From the following statements which one is untrue about Ca

From the following statements, which one is untrue about Ca+ ? Its is transported into cells via gated channels It is required for all signal transduction in a cell It is required for exocytosis It is stored in the endoplasmic reticulum

Solution

Answer:

It is required for exocytosis

Explanation:

Calcium can act in signal transduction resulting from activation of ion channels or as a second messenger caused by indirect signal transduction pathways such as G protein-coupled receptors. To maintain this low concentration, Ca²⁺ is actively pumped from the cytosol to the extracellular space, the endoplasmic reticulum (ER), and sometimes into the mitochondria. It is transported by the voltage-gated ion channels that are selectively permeable to Ca2+.