Spermatogenesis

Question 1

Spermatogenesis occurs in the ____ of the male from the time of sexual maturity onward.

Answer 1

seminiferous tubules

Question 2

These some are self - renewing stem cells and others are already committed to sperm formation, and are found in the periphery of the seminiferous tubules.

Answer 2

spermatogonia

Question 3

The _____ is derived from a committed spermatogonium.

Answer 3

primary spermatocyte

Question 4

The primary spermatocyte undergoes the first meiotic division to produce ____, each with ____ chromosomes.

Answer 4

two secondary spermatocytes; 23

Question 5

Secondary spermatocytes rapidly undergo the second meiotic division, each forming two ____, w/c mature w/out further division into _____.

Answer 5

spermatids; sperm

Question 6

This process of production of a mature sperm from a committed spermatogonium takes about ____ days.

Answer 6

61

Question 7

Normally semen contains _____ sperms per ml.

Answer 7

50 – 100 × 10^6

Question 8

T/F. Sperm production continues, albeit at a reduced rate, into old age, and the total lifetime sperm production of a male exceeds 10^12 .

Answer 8

True.

Question 9

T/F. The numerous replications increase the chance for mutation, & the risk for several single - gene mutations has already been shown to be increased in the offspring of older men.

Answer 9

True.