Physiology MCQ 0002

Sertoli cells in the testis have receptors for:

1. FSH
2. LH
3. Inhibin
4. Testosterone

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The Correct option is A

Explanation with High Yield Facts:

• Sertoli cell (a kind of sustentacular cell) is a 'nurse' cell of the testes which is part of a seminiferous tubule. It is activated by follicle-stimulating hormone, and has FSH-receptor on its membranes. FSH binds to Sertoli cells stimulate testicular fluid production and synthesis of intracellular androgen receptor proteins. Sertoli cells secrete anti- mullerian hormone and activins also.
• LH binds to receptors on interstitial cells of Leydig and stimulates testosterone production, which in turn binds to Sertoli cells to promote spermatogenesis.
• Inhibin is a hormone that inhibits FSH production. It is secreted from the Sertoli cells, located in the seminiferous tubule inside the testes.

Physiology MCQ 0001

Which of the following is correctly matched?

1. B cells – Somatostain
2. D cells – Insulin
3. G cells – Gastrin
4. A cells – rennin

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The Correct option is C

Explanation with High Yield Facts :

• Gastrin is a hormone that stimulates secretion of gastric acid by the parietal cells of the stomach. It is released by G cells in the stomach and duodenum.
• Somatostain- Delta cells (delta-cells or D cells) are somatostatin producing cells. They can be found in the stomach, intestine and the Islets of Langerhans in the pancreas.
• Insulin is synthesized in the pancreas within the beta cells (beta-cells) of the islets of Langerhans. -One to three million islets of Langerhans (pancreatic islets) form the endocrine part of the pancreas, which is primarily an exocrine gland. The endocrine portion only accounts for 2% of the total mass of the pancreas. Within the islets of Langerhans, beta cells constitute 60–80% of all the cells.