5 Written Questions
5 Matching Questions
- Spermatogonial phase
- Penile Trebeculi
- Seminiferous tubules
- Spermatocyte phase (meiosis)
- a Spermatogonia give rise to primary spermatocytes
Stem cells divide to replace themselves and give rise to committed spermatogonia.
Dark type A -stem cells - self renewing population
Pale type A - committed - divide to increase their number
Type B - differentiated type A cells
- b smooth muscle between venous spaces
when these contract it occludes blood to the penis, causing flacidity.
- c Largest accessory gland.
About the size and shape of a walnut.
- d Each testicular lobule contains 1 to 4 highly convoluted seminiferous tubules.
Tubules are separated by connective tissue, stroma, that contains interstitial cells of Leydig. (produce testosterone)
Seminiferous tubules are composed of seminiferous epithelium surrounded by a tunica propria (3-5 layers of myoid cells, peritubular cells).
- e Primary spermatocytes undergo 2 meiotic divisions to produce haploid spermatids
Type B spermatogonia divide by mitotic division to give rise to primary spermatocytes.
Primary spermatocytes replicate their DNA before beginning meiosis and therefore have 4n chromosomes, twice normal.
Meiotic division results in haploid, 22 chromosomes and X or Y.
Cells derived from 1st meiotic division called secondary spermatocytes. They cannot be seen in sections because they immediately enter the 2nd meiotic division.
5 Multiple Choice Questions
- 1 ventral mass, the corpus spongiosum
sits on the bottom of the penis
Urethra located in corpus spongiosum.
Helicine arteries supply blood.
- Epithelium is pseudostratified columnar with stereocilia.
- radical prostectomy in which the entire prostate is removed.
The one side effect that most men wish to avoid is erectile dysfunction due to damage to the cavernous nerves.
- Epididymal lining is pseudostratified with stereocilia.
- Secretion is viscous, whitish yellow fluid with high fructose, which is a principle metabolite of the sperm.
5 True/False Questions
Ductus deferens (muscular layers) → Epithelium is pseudostratified columnar with stereocilia.
Male Reproductive Microanatomy components → Testes
Bulbourethral glands (Cowper's glands)
Clinical Note: Benign Prostatic Hyperplasia → ...
Prostatic Adenocarcinoma Anastamoses → Prostate cancer (from the peripheral section) spreads to the vertebral column via anastomoses between the prostatic venous plexus and the internal vertebral (Batson's) plexus.
Prostate Sections → Peripheral zone - 70%: Site of carcinomas
Central zone - 25% : Resistant to CA and inflammation
Transitional zone - site of benign prostatic hypertrophy (BPH)
Periurethral zone : Involve is later stages of BPH