Testis is not the source for which of the following?
Correct Answer: Dihydrotestosterone
Description: Ref:1. Peil GK. Male reproductive system, in: Textbook of medical physiology. 2nd eel. Ahuja publishing house. 2011; 54: 448-449W F Gartong. The Gonads: Development & Function of the Reproductive System. In: Review of Medical Physiology. 21st eel. California: McGraw-Hill Companies; 2003.Explanation:Leydig cell mainly secretes testosterone.Dehydroepiandrosterone. Androstenodioneare also secreted from leydig cell.Dihydrotestosterone is a testosterone metabolite. It induces the formation of male external genitalia and male secondary sex characteristicsLeydig cellsPrimary cells of steroidogenesis; Present in interstitial space between seminiferous tubules; rich in mitochondria <& EPRSecretes testosterone, DHEA, AndrostenodioneActivity is more in- 8-15 week of IUL - hCG; 3-5 months of post natal (infantile testosterone surge); Onset of puberty - maximum; Basal secretion till senescenceSertoli CellFunctions of sertoli cellGerm cell development - structural supportNourishment & growth of spermatidPhagocytosis (residual bodies during maturation)Formation of tubular fluidSupport spermiation - secrete plasminogen activatorEndocrine function- Inhibin. Follistatin -| FSH- Activin - | FSH- MIS (Mullerian Inhibiting Substance) - 8th week of IUL- Estrogen - from androgen by aromataseIt has FSH. testosterone (receptors) sensitivitySecretory functions- Androgen binding Protein (ABP) - binds with DHT. testosterone & transport to epididymis- H- Y antigen - development of gonads and Plasminogen activatorBlood Testis Barrier (BTB)Paracrine effect on leydig cell
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now