Hormone X activates the cAMP second messenger system in its target cells. The greatest response by a target cell would come from applying a molecule of cAMP to the extracellular fluid surrounding the cell.
<h3>
What is cAMP?</h3>
This is an intracellular second messenger molecule, which regulates activity of hormonal action.
the cAMP stands for cyclic adenosine monophosphate.
<h3>
What is a second messenger molecule?</h3>
The molecules that transfer the signal received from the cell surface to the target hormone are called the second messenger molecules.
Learn more about extracellular fluid here:- brainly.com/question/7938474
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A. the surface of the ocean. They need light for photosynthesis so they cannot live on the bottom of the ocean.
Answer:С) Cells from two organisms combine.
Explanation:Only in sexual reproduction 2 germ cell combine to a organisms
