Part A: How are endocrine and exocrine glands different from each other? Endocri

Question

Part A: How are endocrine and exocrine glands different from each other?

Endocrine glands have no ducts.

Part B:

Exocrine glands secrete hormones. Exocrine glands have specific target organs for their secretions. Exocrine glands are only unicellular in structure.

Endocrine glands have no ducts.

Part B:

Marfan’s syndrome is a disease associated with faulty manufacture of the extracellular protein fibrillin. Since this is a component of elastin, in which of the numbered cells would the damaged gene be expressed?

2 3 4 5 45 6

Explanation / Answer

Part A: Endocrine glands have no ducts.

This is the only correct choice; all other choices are incorrect. Endocrine glands are ductless glands that directly release their messengers (hormones) in to the circulation.

Part B: 2

Fibroblasts secrete fibrillin, which forms a scaffold for the deposition of elastin. Of the choices given in the question, only cell number 2 belongs to the fibroblast-fibrocyte lineage.

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