📚 What is the Function of Inhibin in the Testes?
Inhibin is a glycoprotein hormone secreted by the Sertoli cells in the testes. Its primary function is to regulate sperm production by inhibiting Follicle-Stimulating Hormone (FSH) release from the pituitary gland. Here's a quick study guide:
Quick Study Guide
- 🔬 Inhibin is produced by Sertoli cells in the testes.
- 🧪 Inhibin primarily inhibits the secretion of Follicle-Stimulating Hormone (FSH) from the anterior pituitary gland.
- 🧬 FSH stimulates spermatogenesis, so inhibin helps regulate the rate of sperm production.
- ⚖️ Inhibin acts via a negative feedback loop: increased sperm production leads to increased inhibin, which reduces FSH, thus stabilizing sperm production.
- 📈 Inhibin B is the primary form of inhibin in males and is a reliable marker of Sertoli cell function.
Practice Quiz
- Which cells in the testes produce inhibin?
- Leydig cells
- Sertoli cells
- Germ cells
- Epithelial cells
- What is the primary hormone inhibited by inhibin?
- Luteinizing Hormone (LH)
- Testosterone
- Follicle-Stimulating Hormone (FSH)
- Growth Hormone (GH)
- What is the main function of FSH in males?
- Stimulating testosterone production
- Inhibiting spermatogenesis
- Stimulating spermatogenesis
- Regulating body temperature
- Through what mechanism does inhibin regulate FSH secretion?
- Positive feedback
- Negative feedback
- Direct stimulation
- Indirect stimulation
- Which form of inhibin is predominantly found in males?
- Inhibin A
- Inhibin B
- Inhibin C
- Inhibin D
- What is a clinical significance of inhibin B levels in males?
- Marker of Leydig cell function
- Marker of Sertoli cell function
- Marker of germ cell function
- Marker of pituitary function
- If inhibin levels are high, what is the likely effect on FSH secretion?
- Increased FSH secretion
- Decreased FSH secretion
- No change in FSH secretion
- Unpredictable effect on FSH secretion
Click to see Answers
- B
- C
- C
- B
- B
- B
- B