Which pairs of substances are released from exocrine glands?A.Glucagon and tearsB.Bile and insulinC.Insulin and digestive enzymesD.Tears and bile
Question
Which pairs of substances are released from exocrine glands?A.Glucagon and tearsB.Bile and insulinC.Insulin and digestive enzymesD.Tears and bile
Solution
Exocrine glands are glands that produce and secrete substances onto an epithelial surface by way of a duct. Examples of exocrine glands include sweat, salivary, mammary, ceruminous, lacrimal, sebaceous, and mucous.
A. Glucagon and tears - Glucagon is a hormone, not a substance released by exocrine glands. It is released by the pancreas, specifically the alpha cells of the islets of Langerhans. Tears, on the other hand, are released by the lacrimal glands, which are exocrine glands. So this pair is not correct.
B. Bile and insulin - Bile is a substance released by the liver and stored in the gallbladder. It is indeed secreted by an exocrine process. Insulin, however, is a hormone released by the pancreas, specifically the beta cells of the islets of Langerhans. It is not secreted by an exocrine process. So this pair is not correct.
C. Insulin and digestive enzymes - As mentioned before, insulin is a hormone, not a substance released by exocrine glands. Digestive enzymes, on the other hand, are released by various exocrine glands in the digestive system, such as the salivary glands and the pancreas. So this pair is not correct.
D. Tears and bile - Both tears and bile are substances released by exocrine glands. Tears are released by the lacrimal glands, and bile is released by the liver and stored in the gallbladder. So this pair is correct.
So, the correct answer is D. Tears and bile.
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