Signaling molecules that activate cell surface receptors are essentially the same as those that activate intracellular receptors.

Question

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Signaling molecules that activate cell surface receptors are typically different from those that activate intracellular receptors. Cell surface receptors are activated by molecules that cannot penetrate the plasma membrane, such as hormones, neurotransmitters, and growth factors. In contrast, intracellular receptors are activated by molecules that can cross the plasma membrane, such as steroid hormones and nitric oxide.

Signaling Molecules That Activate Cell Surface Receptors Are Essentially the Same