Which of the following statement best describes endocrine glands?
They secrete their products into ducts.
They release their secretions on an internal surface.
They secrete chemicals into blood.
They include the salivary glands.
Correct Answer : C
Blood then carry them to target cells or organs throughout the body. Hormones are chemical messengers that help to regulate various physiological processes such as growth, metabolism, and reproduction. Unlike exocrine glands (option a), which secrete their products into ducts that carry them to external surfaces such as the skin or digestive tract, endocrine glands have no ducts and release their secretions directly into the circulatory system. Salivary glands (option d) are exocrine glands that secrete saliva into ducts leading to the mouth. Option b is also incorrect as it does not accurately describe endocrine glands.
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