In human during fertilization a sperm firstly comes in contact with which layer of ovum?
1. zona pellucida
2. vitelline membrane
3. Jelly coat
4. zona radiate
The middle piece of the sperm contains:
1. proteins
2. centriole
3. nucleus
4. mitochondria
1. | These seminiferous epithelium contains only proliferative cells |
2. | Functional compartmentalization of the seminiferous epithelium depends on tight junctions |
3. | The interstitial tissue contains few capillaries |
4. | The seminiferous epithelium contains numerous capillaries |
Extrusion of the second polar body from the egg nucleus occurs:
1. | simultaneously with the first cleavage |
2. | after entry of sperm but before fertilization |
3. | after fertilization |
4. | before entry of sperm into the ovum |
Select the correct sequence for the transport of sperm cells in the male reproductive system:
1. | Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal → Urethra → Urethral meatus |
2. | Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra |
3. | Seminiferous tubules → Rete testis → Vasa efferentia → Epididymus → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus |
4. | Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra |
The extra embryonic membranes of the mammalian embryo are derived from
1. Trophoblast
2. Inner cell mass
3. Formative cells
4. Follicle cells
In the 28 day human ovarian cycle, the duration of luteal phase is approximate?
1. 14 days
2. 28 days
3. 30 days
4. 5 days