Question

Cholecystokinin and duocrinin are secreted by

• A. Thyroid gland
• B. Adrenal cortex
• C. Pancreas
• D. Intestine

Answer 1

The correct option is D

Intestine

The correct option is D.

Explanation of the correct option:

1. Cholecystokinin and duocrinin are gastrointestinal hormones produced by endocrine cells of the intestine.
2. Cholecystokinin is produced from the mucosal epithelium of the small intestine and stimulates the secretion of bile and digestive enzymes from the gall bladder and pancreas.
3. Duocrinin is secreted within the intestine and stimulates the secretion from Brunner’s gland in the duodenum.

Explanation of the incorrect options:

Option A:

The thyroid gland produces and secretes thyroxin (T4) and triiodothyronine (T3).

Option B:

The adrenal cortex produces hormones including aldosterone and cortisol.

Option C:

The pancreas produces insulin, glucagon, and somatostatin hormones.

Final answer: Cholecystokinin and duocrinin are secreted by intestine.