Male Repro Histology

Question 1

Describe histology of rete testes

Answer 1

Collagenous “Swiss cheese”

Tubules lined by flattened/cuboidal epithelium

Question 2

Seminiferous tubules are surrounded by _______ / _______ cells, which are a type of ______ _______.

Answer 2

Peritubular/Boundary cells

Smooth muscle

Question 3

Order cells of the testes by susceptibility to damage

Answer 3

Sperm > spermatogonia > Sertoli cells > Leydig cells

Question 4

3 Steps of Spermatogenesis

Answer 4

1) SpermatoCYTOgenesis
- Spermatogonia -> Spermatocytes -> round spermatid (mitosis -> meiosis)
2) Spermiogenesis
- round spermatid -> elongated spermatid
3) Spermiation
- Elongated spermatid enter lumen of seminiferous tubules

Question 5

The granules in the nucleus of spermatogonia consist of _______

Answer 5

Chromatin

Question 6

Secretory products of Sertoli cells

Answer 6

1) Anti-mullerian hormone / mullerian-inhibiting substance

2) Androgen binding protein

Question 7

Secretory products of Leydig cells

Answer 7

1) Testosterone
2) Estrogens

Under control of Lutenizing Hormone (LH)

Question 8

Histological appearance of Efferent Ducts

Answer 8

Pseudostratified columnar epithelium lined by smooth muscle

Question 9

Histological appearance of Epididymis

Answer 9

Principal cells w/ LONG stereocilia (immotile) lined by smooth muscle

Question 10

Where does sperm become motile?

Answer 10

Epididymis

Question 11

Histological appearance of Ductus Deferens

Answer 11

Pseudostratified columnar epithelium w/ long stereocilia lined by 3 layers of smooth muscle: longitudinal - circular - longitudinal

Question 12

The histology of vesicular glands resembles that of _______, except there are only ___ layers of smooth muscle (instead of 3)

Answer 12

Ductus Deferens; 2 (longitudinal outside and circular inside)

Question 13

Functions of vesicular gland secretions

Answer 13

1) Form sperm coagulum
2) Regulate sperm motility
3) Suppress immune function in female genitals

Question 14

The glands within the prostrate gland are _________.

Answer 14

Tubuloalveolar

Question 15

In the dog prostate, the lining of the excretory ducts transitions from _______ to ______ epithelium.

Answer 15

Simple columnar to transitional

Question 16

A histological feature unique to the prostate gland is the

Answer 16

corpora amylacea (eosinophilic concretions)

Question 17

The glands within the bulbourethral gland are ______ in most animals but _______ within the cat and pig.

Answer 17

Tubulo-alveolar; compound tubular

Question 18

The secretions of the prostate gland:

Answer 18

Liquify coagulated semen

Question 19

A major difference between the prostate gland of the dog and the cat is:

Answer 19

The dog’s prostate gland completely encircles the urethra, whereas the cat’s prostate gland is only dorsal to the urethra

Question 20

Describe the lining of the urethra

Answer 20

Transitional [from bladder through prostate) -> columnar

Question 21

The visceral vaginal tunic is made up of which cell type?

Answer 21

Mesothelium

Question 22

What connects the seminiferous tubules to the rete testis?

Answer 22

Straight tubules / Tubuli recti

Question 23

Straight tubules / Tubuli Recti

Answer 23

• B/t seminiferous tubules and rete testes

- Lined by cuboidal epithelium and have a small lumen

Question 24

Which 2 structures travel with the ductus deferens?

Answer 24

• Pampiniform plexus

- Cremaster muscle

Question 25

Describe Sertoli cell nucleus

Answer 25

- Prominent nucleolus | - Oval PERPENDICULAR to basement membrane

Question 26

Ejaculatory ducts are found near _____ and combine _____ and ______.

Answer 26

Prostate gland | Seminal vesicle ducts and ductus deferens

Question 27

How does the lining of the urethra change?

Answer 27

Transitional near prostate, columnar along penis, stratified squamous at distal penis