Which of the following statements correctly describes endocrine glands?
A)They produce hormones into the ducts.
B)They act locally on nearby tissues.
C) They all can pass through the plasma membrane.
D) They are all controlled by the nervous system.

Question

Quizplus · Accepted Answer

Endocrine glands are ductless glands that secrete hormones directly into the bloodstream to be carried to target organs or tissues throughout the body. They do not secrete hormones into ducts. Hormones produced by endocrine glands act on distant target tissues and organs, rather than locally on nearby tissues. Some hormones can pass through the plasma membrane, but not all. Endocrine glands are not all controlled by the nervous system; some are regulated by other factors, such as other hormones or changes in blood levels.

Which of the Following Statements Correctly Describes Endocrine Glands