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True or false: The same signal molecule can induce different responses in different target cells.
Extracellular signals alter the activity of diverse cell _________ to alter cellular behavior.
Extracellular signal molecules can bind to ______________ receptors or _____________ receptors and enzymes.
Steroid hormones bind intracellular receptors that act as _________________________ proteins.
True or false: Gases such as NO are the only signal molecules that can cross the plasma membrane.
What are the three basic classes of cell surface receptors?
G-protein-linked, Ion-channel-linked, and Enzyme-linked
Cyclic AMP is synthesized by ____________, and degraded by __________________
adenyl cyclase; cyclic AMP phosphodiesterase
Cyclic AMP concentration rises rapidly in response to which extracellular signal?
Activation of a _______________________ directs assembly of an intracellular complex.
receptor tyrosine kinase
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