Module 2: Spermatogenesis

Question 1

Process in which male gamete cells develop into spermatozoa
- Can be divided into multiple stages
- Spermatocytogenesis
- Spermatidogenesis
- Spermiogenesis

Answer 1

Spermatogenesis

Question 2

most primitive cell. Diploid. Located in the basal compartment – all others

Answer 2

Spermatogonia

Question 3

primary and secondary. Undergo meiosis to form spermatids

Answer 3

Spermatocyte

Question 4

spherical, haploid cell. Undifferentiated spermatozoa

Answer 4

Spermatid

Question 5

differentiated haploid cell with potential for motility and fertilization

Answer 5

Spermatozoa

Question 6

Long convoluted tubules that make up a majority of the testicular parenchyma

Answer 6

Seminiferous tubules

Question 7

What is the least mature cell type?

Answer 7

Spermatogonia

Question 8

• This process is quiescent until puberty
  - After puberty, continuous development takes place
  - Various stages of spermatogenesis within the seminiferous tubules

Answer 8

Spermatogenesis

Question 9

These cells either
- Replicate to replenish spematogonia (mitosis)
- Replicate to form the next stage (primary spermatocytes)

Answer 9

Spermatogonia

Question 10

• The largest cell type
• First meiotic division (reductional) takes place after formation

Answer 10

Primary spermatocytes

Question 11

Secondary Spermatocytes
- Formed after the first meiotic division
- These are now ___________________

Answer 11

haploid cells

Question 12

Secondary Spermatocytes
- These undergo the second meiotic division
- Called ___________ after second meiotic division

Answer 12

Spermatids

Question 13

• Spermatid to Spermatozoa is known as ____________
• Morphologic change from a round cell to a spermatozoa

Answer 13

Spermiogenesis

Question 14

• Formation of head, neck, middle piece and tail
• Marked loss of cytoplasm

Answer 14

Spermiogenesis

Question 15

• Are located in most apical aspect of the whole layer

Answer 15

Spermatozoa

Question 16

Leydig Cells are primarily responsible for producing _______________

Answer 16

Testosterone

Question 17

It takes a set period of time for a spermatogonia to develop into a spermatozoa:
Canine approximately _________ days

Answer 17

62

Question 18

It takes a set period of time for a spermatogonia to develop into a spermatozoa:
Bovine approximately __________ days

Answer 18

62

Question 19

It takes a set period of time for a spermatogonia to develop into a spermatozoa:
Equine approximately __________ days

Answer 19

55

Question 20

Stimulate secretion of LH and FSH

Answer 20

GnRH

Question 21

______ –> Leydig cells –> testosterone

Answer 21

LH

Question 22

FSH –> ___________ –> function –> Spermatogenesis

Answer 22

Sertoli cells

Question 23

Estradiol/Testosterone –> ____________

Answer 23

Behavior

Question 24

Testosterone —> ________________

Answer 24

Spermatogenesis

Question 25

Inhibin --> ______ (decreased/increased) FSH

Answer 25

Decreased

Question 26

Activin --> _______ (decreased/increased) FSH

Answer 26

Increased

Question 27

Sertoli cells --> ____________________ --> Increased Testosterone concentration in seminiferous tubules

Answer 27

Androgen binding protein (ABP)