Which of the following is NOT true about a chemical functioning in physiological regulation
A)There must be a mechanism to turn off the chemical's action.
B)The chemicals must be secreted by endocrine glands.
C)Target cell must have specific receptor molecules for the chemical.
D)The combination of the chemical and its receptor must cause specific changes to occur in the target cell.

Question

Quizplus · Accepted Answer

While many chemicals involved in physiological regulation are secreted by endocrine glands, not all of them are. Some chemicals are secreted by other glands or even by specific cells within tissues.

Which of the Following Is NOT True About a Chemical