Male Reproductive System

Question 1

Mediation of the emission

Answer 1

Sympathetic (thoracolumbar) adrenergic transmitters

Question 2

What substance found elevated can suggest Sertoli cell tumor?

Answer 2

⬆️ Estradiol

Question 3

Cooling mechanism that favor spermatogenesis

Answer 3

• scrotum itself (skin rugae) ▶️ -4 grades C than abdominal cavity
• spermatic cord ▶️ countercurrent heat exchanger
• cremasteric muscle ▶️ contract - relax

Question 4

How is avoided the retrograde ejaculation of semen into bladder?

Answer 4

SANS ▶️ adrenergic contraction internal sphincter of the bladder

Question 5

Which alteration leads external female genitals structures without the internal ones (vagina ends blindly)?

Answer 5

Testicular feminizing syndrome

*there are testes but receptor to androgens loss function. As MIF exists ▶️ no 🚺 internal organs

Question 6

If you are gonna treat a prostate cancer with GnRH agonist, what must you do first? Why?

Answer 6

• treat first Testosterone receptor antagonist

- can cause a growth in prostate (“big pump up” in testosterone) if you don’t

Question 7

How are the sex steroids, LH, FSH in kallman’s syndrome (⬇️ GnRH)?

Answer 7

⬇️ sex steroids, ⬇️ LH, ⬇️ FSH

Question 8

Why an infusion of GnRH can lead a ⬇️ sex steroids, LH, FSH?

Answer 8

Downregulation of gonadotroph receptors

Question 9

Why an infusion of GnRH can lead a ⬇️ sex steroids, LH, FSH?

Answer 9

Downregulation of gonadotroph receptors