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Biology Question on chemical coordination and integration

MSH is secreted by:

A

Anterior lobe of pituitary

B

Middle lobe of pituitary

C

Posterior lobe of pituitary

D

Endostyle

Answer

Middle lobe of pituitary

Explanation

Solution

The pituitary gland consists of distinct sections, each responsible for producing specific hormones:

  • The middle lobe, known as the pars intermedia, releases melanocyte-stimulating hormone (MSH), which influences skin pigmentation by acting on melanin-containing cells.
  • The anterior lobe of the pituitary gland produces a range of hormones, including prolactin, growth hormone, FSH, LH, TSH, and ACTH.
  • The posterior lobe of the pituitary gland secretes oxytocin and vasopressin.
  • The pineal gland, a separate structure, produces melatonin, a hormone that plays a role in regulating sleep-wake cycles.

So, the correct option is (B): Middle lobe of pituitary