spermatogenesis

Question 1

what are the stages of spermatogenesis

Answer 1

1) multiplication
2) growth
3) maturation
4) differentiation

Question 2

describe the processes which occur int he multiplication stage of spermatogenesis

Answer 2

1) cells of the germinal epithelium divide by mitosis to make diploid spermatogonia and more germinal epithelial cells on the outer layer of the seminiferous tubule

Question 3

describe the processes which occur in the growth stage of spermatogenesis

Answer 3

the spermatogonia divide more via mitosis and enlarge making diploid primary spermatocytes

Question 4

describe the processes which occur in the maturation stage of spermatogenesis

Answer 4

1) primary spermatocytes undergo meiosis I making haploid secondary spermatocytes
2) the secondary spermatocytes undergo meiosis II to produce haploid spermatids

Question 5

describe the processes which occur in the differentiation stage of spermatogenesis

Answer 5

the haploid spermatids differentiate into spermatozoa- forming their midpiece and tails
throughout this process, they are obtaining nutrients through Sertoli cells

Question 6

what are Sertoli cells and their function

Answer 6

1) provides sperm with nutrients

2) protects the sperm from the male immune system as they are genetically different (23 chromosomes vs 46)

Question 7

when does spermatogenesis start

Answer 7

puberty

Question 8

when in the human life cycle does spermatogenesis stop

Answer 8

end of life/ death

Question 9

how many gametes are produced after spermatogenesis

Answer 9

4

Question 10

what is the precise location of the production

Answer 10

the seminiferous tubules- germinal epithelium

Question 11

list the accessory cells during spermatogenesis

Answer 11

Sertoli cells