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प्रश्न
Describe the structure of a Graafian follicle.
Explain the structure of a Graafian follicle.
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उत्तर
- The Graafian follicle is a mature ovarian follicle.
- The secondary oocyte is positioned off to the side and is surrounded by a layer called zona pellucida, which is not made of cells and is produced by the oocyte’s vitelline membrane.
- There are three layers covering the Graafian follicle. They are as follows:
- Theca externa is the name for the outermost protective and fibrous covering.
- Inner to it is cellular theca interna which produces the hormone estrogen.
- Inner to the theca interna are the follicular cells from the membrane granulosa.
- From the membrane granulosa, the cells differentiate into discus proligerus and the corona radiata cells.
- Cumulus oophorus is the term used for the oocyte and surrounding granulosa cells.
- A fluid-filled cavity called the antrum lies between the oocyte and the membrane granulosa.
- It is filled with a fluid called liquor folliculi.
संबंधित प्रश्न
What is menstrual cycle?
Mention one significant difference between Hormones of ovulatory phase and hormones of luteal phase
Give Reasons
The chances of pregnancy to occur are most favourable on or about the 14th day of the menstrual cycle. Explain.
The luteal phase of the menstrual cycle is also called the secretory phase. Give reason.
Mainly which type of hormones control the menstrual cycle in human beings?
The endometrium in the female is the lining of ______.
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
The peak observed in Subject 1 and 2 is due to ______
The graph given below shows the number of primordial follicles per ovary in women at different ages. Study the graph and answer the questions that follow.
- What is the average age of the women at the onset of menopause?
- At what age are maximum primordial follicles present in the ovary, according to the given graph?
The egg is passed down through the oviduct by muscular contractions.
Match Column I and Column II with respect to the menstrual cycle.
| Column I | Column II |
|---|---|
| i. Menstrual phase | c. Secretion of inhibin |
| ii. Follicular phase | b. Development of the primary follicle |
| iii. Ovulatory phase | a. Rapid secretion of LH |
| iv. Secretory phase | d. Secretion of estrogen |
Choose the correct option.
