Question

A molecule is applied to a cell and the intracellular Ca2+ concentration is found to transiently rise. You are curious to understand the mechanism of this molecule so you remove all of the Ca2+ from outside the cell but find that the same effect is observed. You conclude that the molecule is probably having this effect because it sets into motion a chain of events that includes…
A.activation of adenylyl cyclase.
B.increasing the intracellular concentration of cAMP.
C.activation of phospholipase C.
D.blocking the Na+/K+ pump.
E.activation of a phosphodiesterase.

Answer 1

Answer:

The correct answer is option C.

Explanation:

Phospholipase C comes in the category of membrane-associated enzymes, which plays an essential role in the cell physiology of eukaryotes, mainly in the process of signal transduction. One of the general features of the phospholipase C pathway is that it enhances the concentration of calcium within the cell's cytoplasm.  

With the stimulation of phospholipase C within a cell, calcium generally gets discharged from the intracellular compartments, which eventually results in the upsurge of calcium levels within the cell's cytoplasm.