The calcium release channel in the smooth muscle sarcoplasmic reticulum that is opened by increases in phospholipase C activity is the
A) inositol trisphosphate (IP3) receptor channel.
B) ryanodine receptor.
C) dihydropyridine (DHP) receptor.
D) voltage-gated Ca2+ channel.
E) Ca2+-ATPase.
Answer: : A