Q. No.The simultaneously occurring events during the menstrual cycle are:
1.
peak of LH secretion and menstrual flow
2.
follicular development and the uterus becoming highly secretory
3.
formation of corpus Albicans and an increase in progesterone secretion
4.
Proliferation stage of the uterus and increased estrogen production
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Identify the correct statement regarding menopause:
| 1. | Follicles become less responsive to FSH and LH. |
| 2. | Elevated estrogen levels is the cause. |
| 3. | Marks the beginning of menstrual cycles. |
| 4. | Results when follicles develop but contain no oocytes. |
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An organelle covering the head of animal sperm and containing enzymes that digest the egg cell coating, thus permitting the sperm to enter the egg is called as:
| 1. | nebenkern | 2. | manchette |
| 3. | head | 4. | acrosome |
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Which endometrial stage corresponds to the follicular phase of the menstrual cycle?
| 1. | proliferative | 2. | luteal |
| 3. | secretory | 4. | menstruation |
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The thick transparent glycoprotein membrane surrounding a mammalian ovum before implantation is called:
| 1. | oolemma | 2. | corona radiata |
| 3. | zona pellucida | 4. | cumulus oophorus |
The formation of the three embryonic germ layers is called:
| 1. | morulation | 2. | blastulation |
| 3. | neurulation | 4. | gastrulation |
Chorion in terrestrial vertebrate embryos:
| 1. | prevents desiccation of the embryo |
| 2. | helps in the exchange of oxygen and carbon dioxide with the environment |
| 3. | perform excretory functions |
| 4. | acts as a shock absorber |
The functions of the placenta include:
| I: | Acts as an excretory organ. |
| II: | Acts as a respiratory organ. |
| III: | Acts as an endocrine organ. |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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During cleavage divisions, successive blastomeres:
1. have a decreasing nuclear/cytoplasmic ratio
2. become smaller and smaller
3. grow larger and larger
4. undergo meiotic divisions.
A maturing ovarian follicle consisting of an oocyte surrounded by two or more layers of tall, supporting granulosa cells but lacking an antrum is:
| 1. | Primordial follicle | 2. | Primary follicle |
| 3. | Secondary follicle | 4. | Graafian follicle |
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