Which Statement About Hormones Is False

Multiple Choice

Which statement about hormones is false?

A) Hormones are analogous to on-off switches.
B) Hormones are secreted by endocrine glands.
C) Hormone levels are determined by the relative rates of hormone release and hormone removal from the blood stream.
D) Hormones act over a period of time,as measured by their half-life.
E) Several receptors may mediate actions of a single hormone.