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Somatostatin (GHIH) is secreted by
A. Pituitary
B. Thyroid
C. Pineal
D. Hypothalamus

Last updated date: 13th Jun 2024
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Hint: As we know that Somatostatin is also known as Growth hormone -inhibiting hormone (GHIH), is primarily produced in the digestive and the nervous system.

Complete answer:
Let’s learn about somatostatin and the given options.
Somatostatin is a peptide hormone that regulates the functioning of nervous and endocrine systems by inhibiting the production of various other hormones, like, growth hormone, insulin, gastrin, et cetera. Other functions include prevention of tumor formation by regulating the irregular and uncontrolled cell reproduction, act as a neurotransmitter, and affects neural transmission, et cetera.

Pituitary gland is a pea-sized gland located at the base of the brain. It regulates the functioning of other glands by releasing various hormones, like growth hormone, thyroid-stimulating hormone (TSH), follicle-stimulating hormone, et cetera.

Thyroid gland is present at the base of the neck and regulates metabolism, blood pressure, body temperature, et cetera.

Pineal gland controls the circadian rhythm via production of melatonin.

Hypothalamus is located at the base of the brain, just below the thalamus. It controls the activities of the autonomic nervous system and regulates the release of hormones from pituitary and other glands, and hence, is important for regulating different functions of the body, like hunger, thirst, maintaining homeostasis, and many more.
The neuroendocrine cells in the hypothalamus produce somatostatin (GHIH) that inhibits the secretion of growth hormone, TSH, and other pancreatic hormones.

Therefore, the correct option is (D) hypothalamus.

Note: As we know that the pituitary gland is also known as the ‘master gland’ and produces 8 different hormones including growth hormone, however, GHIH is produced by the hypothalamus.