Which of these statements describes hormones
A)All are regulated by the hypothalamus.
B)They are secreted by endocrine glands through ducts into the blood.
C)They must combine with specific receptors on their target cells in order to exert their effects.
D)They are produced in a gland and act on target cells in different tissues.

Question

Quizplus · Accepted Answer

Hormones are produced in a gland (or glands) and act on target cells in different tissues. Options A and B are incorrect because not all hormones are regulated by the hypothalamus and not all of them are secreted through ducts into the blood. Option C is partially correct but not all hormones require specific receptors to exert their effects. Some can act on non-specific receptors or have non-receptor-mediated effects.

Which of These Statements Describes Hormones