Question

Cholecystokinin and enterocrinin are secreted by

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

Answer 1

The correct option is A Intestine

Cholecystokinin is secreted from the duodenum and causes contraction of gall bladder and secretion of pancreatic juice into duodenum. Enterocrinin is secreted from duodenum and stimulates release of alkaline mucus from the intestinal glands.

• Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.
  
• Adrenal cortex is part of adrenal gland and secretes glucocorticoids (cortisol,) mineralocorticoids (aldosterone) and sexocorticoids (androgens).
• Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.
  

Hence, cholecystokinin and enterocrinin are secreted from duodenum (part of small intestine).

So, the correct answer is 'Intestine'.