Q. No.In the absence of fertilization, corpus luteum:
1.
Stops secreting progesterone but increases the secretion of estrogen
2.
Stops secreting estrogen but increases the secretion of progesterone
3.
Increases the secretion of both progesterone and estrogen
4.
Degenerates
What happens when a sperm enters the cytoplasm of the secondary oocyte?
1. Release of first polar body
2. Completion of meiosis II
3. Degeneration of polar bodies
4. Dissolution of zona pellucida
Corpus luteum is:
1. Ruptured Graafian follicle
2. Released ovum surrounded by cells
3. Developing follicle
4. Enzyme-secreting structure in the ovary
The cessation of menstrual cycles is called as:
| 1. | Menarche | 2. | Thelarche |
| 3. | Pubarche | 4. | Menopause |
LH surge:
| 1. | is a dramatic sudden increase in the levels of LH during the early part of menstrual cycle and is responsible for ovulation |
| 2. | is a dramatic sudden decrease in the levels of LH during the early part of menstrual cycle and is responsible for ovulation |
| 3. | is a dramatic sudden decrease in the levels of LH during the mid-menstrual cycle and is responsible for ovulation |
| 4. | is a dramatic sudden increase in the levels of LH during the mid-menstrual cycle and is responsible for ovulation |
Zona pellucida is a membrane surrounding:
| 1. | Secondary oocyte | 2. | Secondary follicle |
| 3. | Corona Radiata | 4. | Trophoblast cells |
What ensures that only one sperm can fertilize the ovum?
1. Corona Radiata
2. Ground substance around ovum
3. Zona pellucida
4. Acrosome
Fertilization occurs at:
1. Infundibulum of the fallopian tube
2. Ampullary – isthmic junction of the fallopian tube
3. Fundus of the uterus
4. Body of the uterus
In humans, the sex of the baby is determined:
| 1. | At the time of fertilization and by the father |
| 2. | At the time of fertilization and by the mother |
| 3. | At the time of implantation and by the father |
| 4. | At the time of implantation and by the mother |
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