What term describes a gland with a duct that opens to the external environment such as mucous, saliva, sweat, and breast milk?

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Study for the Leaving Certificate Biology Test. Prepare with flashcards and multiple-choice questions. Each question includes hints and explanations to enhance learning. Get ready to excel in your exam!

Multiple Choice

What term describes a gland with a duct that opens to the external environment such as mucous, saliva, sweat, and breast milk?

Explanation:
Glands that have a duct to the outside or to a body surface are exocrine glands. Their secretions are released through these ducts, which is why you find mucous, saliva, sweat, and milk ultimately on surfaces or outside the body. Endocrine glands lack ducts and release hormones directly into the bloodstream. Some organs, like the pancreas, have both functions (mixed glands). So the term for a gland with a duct to the external environment is exocrine gland.

Glands that have a duct to the outside or to a body surface are exocrine glands. Their secretions are released through these ducts, which is why you find mucous, saliva, sweat, and milk ultimately on surfaces or outside the body. Endocrine glands lack ducts and release hormones directly into the bloodstream. Some organs, like the pancreas, have both functions (mixed glands). So the term for a gland with a duct to the external environment is exocrine gland.

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