Question

bio - 201l topic 2: tissues and integument
practice it
lo 2.3. which answer describes an exocrine gland?
endocrine glands have secretions that enter the bloodstream and travel to a distant target organ.
exocrine glands have secretions that leave through a duct that opens indirectly to the internal environment.
exocrine glands have no secretions.
exocrine glands have secretions that leave through a duct that opens directly, or indirectly, to the external environment.
exocrine glands are ductless glands that release secretions directly into surrounding tissues and fluids.

Explanation:

Exocrine glands secrete substances through ducts that open directly or indirectly to the external environment. For example, sweat glands secrete sweat to the skin - surface (external environment). The first option describes endocrine glands, the second is incorrect as ducts open to external not internal environment, the third is wrong as they do secrete substances, and the fifth describes endocrine (duct - less) glands.

Answer:

Exocrine Glands have secretions that leave through a duct that opens directly, or indirectly, to the external environment.