Place the Following Intracellular Events of the Beta 2 Receptor

question 15

Multiple Choice

Place the following intracellular events of the Beta 2 receptor stimulation in order.
I.Phosphodiesterase breaks down cyclic 3',5'-AMP into 5'-AMP
II.Adenylate cyclase combines with magnesium and ATP to form cyclic 3',5'-AMP
III.Cyclic 3',5'-AMP results in bronchial smooth muscle relaxation
IV.Beta-2 stimulation causes the formation of adenylate cyclase

• A) I, II, III, IV
• B) III, IV, I, II
• C) IV, II, III, I
• D) IV, III, II, I

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