Hormone X Activates the CAMP Second Messenger System in Its

question 25

Multiple Choice

Hormone X activates the cAMP second messenger system in its target cells. The greatest response by a cell would come from

• A) applying a molecule of hormone X to the extracellular fluid surrounding the cell.
• B) injecting a molecule of hormone X into the cytoplasm of the cell.
• C) applying a molecule of cAMP to the extracellular fluid surrounding the cell.
• D) injecting a molecule of cAMP into the cytoplasm of the cell.
• E) injecting a molecule of activated, cAMP-dependent protein kinase into the cytoplasm of the cell.

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