Question

Cholecystokinin and duocrinin are secreted by

• A. adrenal cortex
• B. thyroid gland
• C. intestine
• D. pancreas.

Answer 1

The Correct Option is C

The question asks us to identify the source of secretion for the hormones "cholecystokinin" and "duocrinin." Let's understand each option:

1. Adrenal Cortex: The adrenal cortex is a part of the adrenal glands and primarily secretes corticosteroids like cortisol, aldosterone, and androgens. It does not secrete cholecystokinin or duocrinin.
2. Thyroid Gland: This gland produces hormones such as thyroxine (T4) and triiodothyronine (T3), which regulate metabolism. It is not responsible for secreting cholecystokinin or duocrinin.
3. Intestine: The small intestine is an organ in the digestive system, which secretes several hormones, including cholecystokinin and duocrinin. Cholecystokinin plays a crucial role in stimulating the digestion of fats and proteins, while duocrinin aids in stimulating the secretion of digestive enzymes.
4. Pancreas: The pancreas produces insulin, glucagon, and other digestive enzymes. However, it does not secrete cholecystokinin or duocrinin directly.

Based on the functions and secretions associated with each option, it is evident that the correct source of cholecystokinin and duocrinin is the intestine. Therefore, the correct answer is:

Intestine

In conclusion, understanding the function and origin of these hormones led us to the correct option by analyzing the given choices methodically. The intestine is responsible for secreting these specific hormones, which a key player in digestive processes.