Question

From which part is MSH secreted.
A. Anterior lobe of pituitary
B. Intermediate lobe of pituitary.
C. Posterior lobe of pituitary
D. Lateral lobe of pituitary

Answer 1

Hint: MSH is melanocyte cells stimulating hormone. This hormone is secreted by the pituitary gland. This hormone is also called an intermedin hormone. It regulates the pigmentation of the skin.

Complete step by step answer: MSH hormone has two types MSH alpha and MSH beta. MSH alpha has 13 amino acids and MSH beta has 18 amino acids. This hormone induces melanin pigment to spread. This hormone is responsible for darkening skin color. This hormone is secreted by cells of the intermediate part of the anterior pituitary. The pituitary gland is a pea-shaped small gland that sits in the sella turcica saddle of the sphenoid bone in the brain. The pituitary gland is epidermal in origin. It has two parts adenohypophysis (anterior pituitary) and neurohypophysis (post pituitary). Both adenohypophysis and neurohypophysis are different in origin. Adenohypophysis is developed from the pharyngeal epidermis. Neurohypophysis is developed from the neural epidermis. The anterior pituitary gland has three parts that are pars intermedia (mid pituitary), pars distalis, and pars tuberalis. Pars intermedia secrete MSH.

So, the correct option is B, i.e., intermediate lobe of pituitary.

Note: Hormones secreted by the anterior pituitary are regulated by releasing factors and inhibiting factors of the hypothalamus. Hormones secreted by the anterior pituitary also induce other glands to secrete hormones like the thyroid and adrenal gland.