Down-regulation of a target cell can occur in response to
A)prolonged decrease in the level of a hormone.
B)prolonged increase in the level of a hormone.
C)signals from antagonistic hormone products.
D)signals from the posterior pituitary.

Question

Quizplus · Accepted Answer

Down-regulation occurs when there is a prolonged increase in the level of a hormone, leading to a decrease in the number of receptors on the target cell to reduce its sensitivity to that hormone.

Down-Regulation of a Target Cell Can Occur in Response to