Insulin secretion is inhibited by:

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ATI The Medical Surgical Endocrine Test Questions

Question 1 of 5

Insulin secretion is inhibited by:

Correct Answer: D

Rationale: Somatostatin inhibits insulin secretion from β cells. CCK, amino acids, glucagon, and glucose stimulate it.

Question 2 of 5

Which of the following substances decreases the activity of hormone-sensitive lipase:

Correct Answer: D

Rationale: Prostaglandin E inhibits hormone-sensitive lipase, reducing lipolysis, while adrenaline, thyroxine, and TSH stimulate it; serotonin has minimal direct effect.

Question 3 of 5

Regarding protein digestion and absorption, which is TRUE?

Correct Answer: D

Rationale: Most amino acids are absorbed via Na^+-dependent transporters in the gut lumen; pepsinogens need acid, and carboxy peptidases are distinct enzymes.

Question 4 of 5

Defective osteoclasts leads to:

Correct Answer: B

Rationale: Defective osteoclasts impair bone resorption, causing osteopetrosis (dense bones); other conditions involve different mechanisms.

Question 5 of 5

Which statement accurately describes endocrine glands?

Correct Answer: A

Rationale: Endocrine glands secrete directly into the bloodstream, whereas exocrine glands secrete via a duct.

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