In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:
Correct answer: B. Pepsin
- A. Trypsin
- B. Pepsin
- C. Chymotrypsin
- D. Amylase
- E. Lipase
Explanation
Secretin is a hormone that primarily stimulates the pancreas to release digestive enzymes such as trypsin, chymotrypsin, amylase, and lipase. These enzymes are crucial for the digestion of proteins, carbohydrates, and fats in the small intestine. However, pepsin is an enzyme produced in the stomach and is not under the regulatory influence of secretin. Instead, pepsinogen (the inactive form of pepsin) is activated in the acidic environment of the stomach. Therefore, blocking secretin production affects all listed pancreatic enzymes but does not influence pepsin levels. Hence, the correct answer is Pepsin, as it would not be affected by the blockage of secretin.
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About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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