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Which of the following is not an example of an exocrine gland?
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4. Tissues & Histology
Glandular Epithelial Tissue
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Exocrine glands differ from endocrine glands in that exocrine glands:
A
Secrete their products into ducts that deliver them to an epithelial surface or lumen
B
Produce only lipid-based hormones and have no role in producing enzymes or mucus
C
Release their products directly into the bloodstream or interstitial fluid
D
Lack secretory cells and instead rely on filtration across capillary walls
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Step 1: Understand the basic difference between exocrine and endocrine glands. Exocrine glands secrete their products through ducts, while endocrine glands release hormones directly into the bloodstream.
Step 2: Recall that exocrine glands produce substances such as enzymes, mucus, and other secretions that need to be delivered to specific surfaces or cavities, not directly into the blood.
Step 3: Recognize that endocrine glands produce hormones, which are chemical messengers released into the interstitial fluid and then absorbed into the bloodstream to reach target organs.
Step 4: Evaluate each option by matching it with the known characteristics of exocrine glands: they secrete through ducts, produce enzymes or mucus, and do not release products directly into the blood.
Step 5: Conclude that the correct distinguishing feature of exocrine glands is that they secrete their products into ducts that deliver them to an epithelial surface or lumen.
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