Increased Cytosolic [Ca²⁺] Involved in Signaling Can Originate from

Multiple Choice

Increased cytosolic [Ca²⁺] involved in signaling can originate from

A) Influx from the extracellular fluid through channels on the plasma membrane
B) Efflux from the mitochondria into the cytosol
C) Efflux from stores in the endoplasmic reticulum through RyR or IP₃ receptors
D) Release from binding sites within the cytosol
E) A and C are correct