Describe the two primary types of glands
A) Endocrine glands release their substances into the interstitial fluid; exocrine glands release their secretions into ducts that open onto an epithelial surface.
B) Endocrine glands release their secretions into ducts that open onto an epithelial surface; exocrine glands release their substances into the interstitial fluid.
C) Mucus glands secrete mucus through a duct to the inside surface of body; sweat glands secrete sweat through a duct to the outside surface of the body.
D) Sweat glands secrete sweat through a duct to the outside surface of the body; oil glands secrete sebum through a duct to the outside surface of the body.
E) Endocrine glands release their substances into the interstitial fluid; exocrine glands release their secretions through a duct to the outside surface of the body.
Answer: A
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Endocrine glands
A. lack ducts and secrete their products onto the skin surface. B. possess short ducts and secrete their products directly onto the skin surface. C. secrete mucus directly into a body cavity. D. possess ducts to secrete their products into the bloodstream or into interstitial fluid. E. lack ducts and secrete their products into the bloodstream or into interstitial fluid.