The following glands below are purely exocrine, except;[Fill in the blank]

Question

BlackTom AI · Accepted Answer

The question asks: The following glands below are purely exocrine, except; [Fill in the blank].

Option a: Lacrimal glands. These are classic exocrine glands because they secrete tears onto the surface of the eye via ducts; there is no endocrine secretion involved. Therefore, this option describes a purely exocrine gland.

Option b: Pancreas. The pancreas has a dual role: its acinar cells secrete digestive enzymes (an exocrine function) through ducts, while the islets of Langerhans secrete hormones like insulin and glucagon (an endocrine function). This mixed (endo-exocrine) nature means it is not purely exocrine, which makes this the correct choice for the question.

Option c: Parotid glands. The parotid gland is a major salivary gland that secretes saliva through ducts and does not have an endocrine component. It is purely exocrine.

Option d: Sebaceous glands. Sebaceous glands secrete sebum into hair follicles or skin surfaces via ducts, serving a protective lubricating function; they are exocrine.

Option e: Ceruminous glands. Ceruminous glands in the external ear canal produce earwax (cerumen) via ducts, which is an exocrine secretion.

In summary, each of the glands in options a, c, d, and e functions solely through exocrine secretions, whereas the pancreas performs both exocrine and endocrine roles. This mixed functionality is what makes the pancreas the exception to the statement.

The following glands below are purely exocrine, except;[Fill in the blank]单项选择题

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