A. | Gonadotropin LH stimulates synthesis and secretion of Androgen |
B. | Gonadotropin releasing hormone from hypothalamus |
C. | Androgen stimulates spermatogenesis |
D. | Gonadotropin FSH helps in the process of spermiogenesis |
E. | Gonadotropins from anterior pituitary gland |
1. | (E), (A), (D), (B), (C) | 2. | (C), (A), (D), (E), (B) |
3. | (B), (E), (A), (C), (D) | 4. | (D), (B), (A), (C), (E) |
1. | In spermiogenesis, spermatids are formed, while in spermiation, spermatozoa are formed. |
2. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatids are formed. |
3. | In spermiogenesis, spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation, spermatozoa are formed. |
4. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules. |
1. | Is produced by granulosa cells in the ovary and inhibits the secretion of FSH |
2. | Is produced by granulosa cells in the ovary and inhibits the secretion of LH |
3. | Is produced by nurse cells in the testes and inhibits the secretion of LH |
4. | Inhibits the secretion of LH, FSH and prolactin. |
Which one of the following statements about human sperm is correct?
1. | The acrosome has a conical, pointed structure used for piercing and penetrating the egg, resulting in fertilization. |
2. | The sperm lysins in the acrosome dissolve the egg envelope, facilitating fertilization. |
3. | The acrosome serves as a sensory structure, leading the sperm towards the ovum. |
4. | The acrosome serves no particular function. |
Seminal plasma in humans is rich in:
1. | fructose, calcium and certain enzymes |
2. | fructose and calcium but has no enzymes |
3. | glucose and certain enzymes but has no calcium |
4. | fructose and certain enzymes but poor in calcium |
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:
1. | spermatocyte-spermatogonia- spermatid-sperms |
2. | spermatogonia-spermatocyte-spermatid-sperms |
3. | spermatid-spermatocyte-spermatogonia-sperms |
4. | spermatogonia-spermatid-spermatocyte-sperms |
1. primary spermatocytes
2. secondary spermatocytes
3. spermatids
4. spermatogonia