Hormones are chemical substances produced in one organ that are released into the bloodstream and affect the function of a target organ. Which of the following conditions is required for the target organ to respond to a particular hormone?
A) Cells in the target organ must modify their plasma membranes to allow the hormone to enter the cytoplasm.
B) The target organ must be the same as the organ that produced the hormone.
C) The target organ must have the opposite mating type of the organ that produced the hormone.
D) The target organ must have receptors that recognize and bind the hormone molecule.

Question

Quizplus · Accepted Answer

The target organ must have receptors that recognize and bind the hormone molecule. This is because hormones act like keys that must fit into specific locks in order to have a physiological effect. Once the hormone binds to its respective receptor, it triggers a cascade of physiological responses within the target organ.

Hormones Are Chemical Substances Produced in One Organ That Are