A patient has high levels of hormones.To adapt to the high hormone concentrations,the patient's target cells have the capacity for:
A) Negative feedback
B) Positive feedback
C) Down-regulation
D) Up-regulation

Question

Quizplus · Accepted Answer

High concentrations of hormone decrease the number of receptors; this is called down-regulation; thus,the cell can adjust its sensitivity to the concentration of the signaling hormone.
Adaptation to high hormone concentration is the process of down-regulation.Negative feedback regulates hormone release.
Adaptation to high hormone concentration is the process of down-regulation.Positive feedback regulates some forms of hormone release.
Up-regulation is a response to low concentrations of hormone,thus increasing the number of receptors per cell.

A Patient Has High Levels of Hormones