Cells Can Increase Their Responsiveness to an External Chemical Regulator

question 25

Multiple Choice

Cells can increase their responsiveness to an external chemical regulator by

• A) increasing the number of their transmembrane receptors by exocytosis.
• B) decreasing the number of their transmembrane receptors by endocytosis.
• C) uncoupling their receptors from the second message generator.
• D) increasing the number of their transmembrane receptors by endocytosis.
• E) mutating their extracellular receptors so that the affinity for the chemical regulator is reduced.

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