Question

The hormone insulin is secreted by

• A. Hypothalamus
• B. Thymus
• C. $\beta$- cells of islet of Langerhans
• D. Pituitary

Answer 1

Answer: (C)

$\beta$- cells of islet of Langerhans

A. Hypothalamus is present in the forebrain. This gland secretes hormones that regulate the synthesis and secretion of hormones of pituitary gland.

B. Thymus gland is associated with the development of immune system and present on the dorsal side of heart.

C. ββ-cells of islet of Langerhans are part of pancreas and secrete insulin hormone which regulate blood glucose levels.

D. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.

So, the correct answer is 'ββ- cells of islet of Langerhans'.