Which of the Following Events Occurs Last

question 71

Multiple Choice

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.

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