Which of the following events occurs last? A) IP₃ (inositol triphosphate) is produced. B) Epinephrine combines with membrane-bound receptor on smooth muscle cell. C) Calmodulin binds to the enzyme that phosphorylates myosin and cross-bridges form. D) IP₃ stimulates Ca²⁺ release from the endoplasmic reticulum. E) Ca²⁺ binds with calmodulin.

Question

Quizplus · Accepted Answer

Calmodulin binding to the enzyme that phosphorylates myosin and the formation of cross-bridges occur after the intracellular calcium levels have increased, which is a result of the events listed in the other options.

Which of the Following Events Occurs Last