Upon binding of a single first messenger to a plasma membrane, thousands of second messengers may becomeactivated. This effect is known as
A) receptor down-regulation.
B) receptor up-regulation.
C) amplification.
D) humoral stimuli.
E) synergism.

Question

Quizplus · Accepted Answer

Amplification occurs when a small number of first messenger molecules binding to a cell surface receptor trigger a large intracellular response, resulting in the activation of many second messenger molecules. This allows for a greater cellular response to a small initial signal.

Upon Binding of a Single First Messenger to a Plasma