Spermatogenesis

Question 1

Is the process of gamete formation from the primordial sex cells.

Answer 1

Gametogenesis

Question 2

The entire process involved in the transformation
of germinal epithelial cells (stem cells) to
spermatozoa.

Answer 2

Spermatogenesis

Question 3

Spermatogenesis occurs in what part of the male reproductive system.

Answer 3

Testis

Question 4

A thick capsule of dense irregular connective tissue enclosing the testis.

Answer 4

Albugineous tunic (tunica albuginea)

Question 5

Are highly convoluted, thick-walled tubules lined by germ cells in various stages of spermatocytogenesis and spermiogenesis, which are collectively referred as spermatogenic series.

Answer 5

Seminiferous tubules (tubuli seminiferi contorti)

Question 6

Proliferative phase whereby spermatogonial cells
multiply by a series of mitotic divisions followed by
the meiotic divisions which produce the haploid (n)
number of chromosomes

Answer 6

Spermatocytogenesis

Question 7

Maturation of the spermatids while they are still in
the adluminal compartment.

Answer 7

Spermiogenesis

Question 8

The ends of seminiferous tubules that will straighten out will become the _

Answer 8

Straight seminiferous tubules (tubuli seminiferi recti)

Question 9

The ends of seminiferous tubules that will straighten out wi

Question 10

Is a very thin fibrous layer encapsulating the seminiferous tubules.

Answer 10

Basement membrane

Question 11

Polyhedral cells found either singly or in groups in the supporting tissue or the interstitial tissue filling the space between the tubules. They are recognized by their small, round nucleus and an acidophilic, often foamy cytoplasm.

Answer 11

Interstitial cells (Leydig cells)

Question 12

Most immature spermatogenic cells, are small, round cells, with dark, round nucleus that lie adjacent to the basement membrane.

Answer 12

Spermatogonia

Question 13

Largest cells in the semineferous tubules whose nuclei of ten show distinct chromatin. They are daughter cells of spermatogonia which have entered the growth phase and like immediately next to them.

Answer 13

Primary spermatocytes

Question 14

Are smaller cells than the primary spermatocytes located towards the lumen. These cells are the results of the first maturation division. They are rarely observed because they undergo the second meiotic division shortly after they arise forming spermatids.

Answer 14

Secondary spermatocytes

Question 15

Round cells with pale nuclei that occur in clusters toward the lumen of the semineferous tubules.

Answer 15

Early spermatids

Question 16

Characterized by small, oval to elongated, dark heads and long, faint tails that project into the lumen. They are eventually released from the semineferous epithelium as spermatozoa.

Answer 16

Late spermatids

Question 17

The mature sperm cells with condensed darkly stained heads and filamentous tails. They are located in the lumen of the semineferous tubules.

Answer 17

Spermatozoa

Question 18

Tall columnar cells interspersed between the spermatogonia that extend from the basement membrane to the lumen of the tubule. They are fewer in numbers than the spermatogenic cells. They are distinguished by a pale oval or triangular nucleolus.

Answer 18

Sertoli cells (sustentacular cells)

Question 19

What is the function of Leydig cell?

Answer 19

Is to produce testosterone for the maintenance of the spermatogenesis.

Question 20

What is the function of Sertoli cells?

Answer 20

Facilitates progression of germ cells to spermatozoa via direct contact and by controlling the environment milleu within the semineferous tubules.

Question 21

Process of spermatogenesis

Answer 21

Primordial Germ Cells > Spermatogonium > Primary spermatocytes > Secondary spermatocytes > Spermatids > Sperm Cells