Question 13 Cells can regulate their responsiveness to chemical messengers. For

Question

Question 13 Cells can regulate their responsiveness to chemical messengers. For example, a cell that 'wanted' to decrease its physiological response evoked effect. Circle any that apply. by a chemical messenger could theoretically do so by which mechanism(s)? Assume all these are possible, which one could produce the desired A) Degrade a lipophilic first messenger more slowly B) Downregulate the number of receptors for the chemical messenger c) Phosphorylate a molecule in the intracellular signaling pathway to decrease its activity. D) Phosphorylate the receptor so that it has a decreased affinity for the chemical messenger. E) Remove a second messenger more quickly.

Explanation / Answer

ANSWER IS B,D

B. down regulate the no. of receptors for the chemical messenger

d. phosphoryltae the receptors so that it has a decrased affionity for the chemical messenger

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