One Form of Receptor Desensitization Can Be Mediated by Negative

question 28

Multiple Choice

One form of receptor desensitization can be mediated by negative feedback involving phosphorylation of the receptor itself by a kinase activated downstream of a second messenger.The phosphorylated receptor likely:

• A)would be resensitized by a kinase.
• B)would activate heterotrimeric G proteins at a faster rate.
• C)would be unable to bind ligand.
• D)could be resistant to desensitization if Ser/Thr phosphatases were acting on the same receptor,

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