Week 10: Histology of the Male Reproductive system

Question 1

Testes functions

Answer 1

1. spermatogenesis

2. steroidogenesis

Question 2

Testosterone:

Answer 2

Essential for spermatogenesis, emryonic develop into male foetus, male pysical characteristics

Question 3

Lobules of testes:

Answer 3

Seminiferous tubules = 150-200um diameter. Site of spermatogenesis.
CT stroma = Leydig cells (steroidogensis)

Question 4

What produces collagen in LP of Seminiferous tubules?

Answer 4

Myoid cells

Question 5

What cells extend thru complete epithelial thickness?

Answer 5

Sertoli cells

Question 6

Spermatogenic cells

Answer 6

Spermatogonia (2n) = immature, rest on basal lamina - divied by mitosis. Spermatocytes (2m-1n) - patchy coloured nucleus, 2 meitoic divisions - into haploid cells.
Spermatids - dark homogenous stained nucleus, differentiate into mature sperm

Question 7

Process by which spermatids differentiate into mature sperm

Answer 7

Spermiogenesis

Question 8

Epididymis features/function

Answer 8

Maturation, motility and storage of sperm. Stereocilia.

Question 9

Spermatogensis stages

Answer 9

Spermatogonia (2n)
Mitosis
1° Spermatocyte (2n)
Meiosis I
2° Spermatocyte (1n)
Meiosis II
Spermatids (1n)
Spermiogenesis
Sperm cells (1n haploid)

Question 10

What cells undergo meisosis 1? Male

Answer 10

primary spermatocyte

Question 11

Prostate gland secretes

Answer 11

Enzymes: PSA, prostatic acid phosphatsie (PAP), fibrinolysin

Question 12

Prostate secretions function:

Answer 12

Liquefies sperm & dissolves cervical mucus

Question 13

Prostae gland histological features

Answer 13

Prostatic concretions, smooth muscle, collagen, fibroblasts

Question 14

How long does it take for sperm to become mature

Answer 14

74 days = non-motile

Question 15

Where do sperm acquire motility

Answer 15

epididymis

Question 16

What is semen

Answer 16

Sperm from seminf t. + fluids from epidy, semial v, porstet, blubouethral

Question 17

What does seminal vesicles produce

Answer 17

fructose, prostaglandins

Question 18

Erection -

Answer 18

1. psymp stimulation - via acetlycoline & nitric oxide relaxes sm in helicene arteries.
2. filling corpera.
3. blood accumulates - due to compression
4. venous outflow also blocked by compression = tumescence

Question 19

Ejaculation

Answer 19

5. Sympathetic stim - causes contraction SM in helicene arteries & ejaculation
6. leads to decreased blood flow
7. lowers pressure in corpora
8. allows blood to drain from corpera