Which Statement About Communication Signals in Animals Is True

Multiple Choice

Which statement about communication signals in animals is true?

A) Most intercellular communication occurs by signals that enter cells by endocytosis.
B) Endocrine signals can be distributed through the circulatory system.
C) Endocrine glands secrete their products into ducts.
D) Endocrine cells release hormones into ducts.
E) Hormones influence only the activities of adjacent cells.