Changes in GnRH pulse frequency in females is controlled by circulating levels of
1. Estrogen and progesterone
2. Estrogen and inhibin
3. Progesterone only
4. Progesterone and inhibin
The amnion of mammalian embryo is derived from
1. Mesoderm and trophoblast
2. Endoderm and mesoderm
3. Ectoderm and mesoderm
4. Ectoderm and endoderm
What is the correct sequence of sperm formation?
1. Spermatid, Spermatocyte, Spermatogonia, Spermatozoa
2. Spermatogonia, Spermatocyte, Spermatozoa, Spermatid
3. Spermatogonia, Spermatozoa, Spermatocyte, Spermatid
4. Spermatogonia, Spermatocyte, Spermatid, Spermatozoa
Which one of the following statements is false in respect of viability of mammalian sperm?
1. Viability of sperm is determined by its motility.
2. Sperms must be concentrated in a thick suspension.
3. Sperms are viable for only up to 24 hours.
4. Survival of sperm depends on the pH of the medium and is more active in alkaline medium.
Ovulation in the human female normally takes place during the menstrual cycle
1. just before the end of the secretory phase.
2. at the beginning of the proliferative phase.
3. at the end of the proliferative phase.
4. at the mid-secretory phase.
Bartholin’s glands are situated
1. On the sides of the head of some amphibians.
2. At the reduced tail end of birds.
3. On either side of vagina in humans.
4. On either side of vas deferens in humans.
The human fetus develops limbs and digits by the end of:
1. First month of pregnancy
2. Second month of pregnancy
3. Fifth month of pregnancy
4. Sixth month of pregnancy
The main function of mammalian corpus luteum is to produce:
1. Oestrogen only
2. progesterone
3. human chorionic gonadotropin
4. relaxin only
1. | Increase in oestrogen and progesterone ratio |
2. | Synthesis of prostaglandins |
3. | Release of oxytocin |
4. | Release of prolactin |
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. |