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

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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 saliva and sweat?

Explanation:
Exocrine glands are the glands that have ducts carrying their secretions to the outside of the body or into a body cavity. The key feature is that their products reach the external environment through a duct, which fits examples like saliva from salivary glands and sweat from sweat glands. Endocrine glands, in contrast, release hormones directly into the bloodstream and lack ducts. Mixed glands have both features, but the description given—secretions leaving via a duct to the exterior—is best matched by exocrine glands. Glandular tissue is just tissue that forms glands and doesn’t specify how secretions are released.

Exocrine glands are the glands that have ducts carrying their secretions to the outside of the body or into a body cavity. The key feature is that their products reach the external environment through a duct, which fits examples like saliva from salivary glands and sweat from sweat glands. Endocrine glands, in contrast, release hormones directly into the bloodstream and lack ducts. Mixed glands have both features, but the description given—secretions leaving via a duct to the exterior—is best matched by exocrine glands. Glandular tissue is just tissue that forms glands and doesn’t specify how secretions are released.

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