Spermatogenesis (-iogenesis)

Question 1

When does sperm mature?

Answer 1

At puberty (Spermatogonia –> Spermatozoa)

Question 2

Explain Primordial germ cells to spermatids

Answer 2

PGCs form spermatogonial cells, some form type A spmtg. cells, divide to form type B spmtg., divide to form primary spermatocytes, and secondary after meiosis 1, and spermatids after meiosis 2

Question 3

Where are spermatogonia and spermatids during maturation?

Answer 3

Embedded in Sertoli cell recesses, joined by cytoplasmic bridges due to no cytokinesis

Question 4

What regulates spermatogenesis? How?

Answer 4

LH, stimulates testosterone prod. in Leydig cells, which binds to Sertoli cells promoting spermatogenesis (FSH also helps)

Question 5

What is Spermiogenesis?

Answer 5

Spermatids are transformed into Spermatozoa

Question 6

What happens in Spermiogenesis?

Answer 6

Acrosome is formed, Nucleus condenses, Neck-middle-tail formed, cytoplasm sheds as residual bodies (phag. by sertoli cells)

Question 7

Where do spermatozoa go?

Answer 7

Enter seminiferous tubules, traveling to epididymis where they gain full mobility