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प्रश्न
Explain the role of pituitary and the ovarian hormones in menstrual cycle in human females
उत्तर
Menstrual cycle starts with menstrual flow (3 to 5 days), caused due to the breakdown of the endometrium of the uterus, which is followed by the follicular phase. In this phase, the primary follicles mature into the Graffian follicles. This causes the regeneration of the endometrium.
These changes are brought about by ovarian and pituitary hormones.
• In this phase, the release of gonadotropins (LH and FSH) increases. This causes follicular growth and the growing follicles produce oestrogen.
• The LH and FSH are at their peak in the middle of the cycle (14th day), and cause the rupture of the Graffian follicles to release ovum. This phase is called the ovulatory phase.
• The remains of the Graffian follicles get converted into the corpus luteum, which secretes progesterone for the maintenance of the endometrium.
APPEARS IN
संबंधित प्रश्न
Uterus, Parturition, Fertilisation, Gestation, Implantation.
Briefly describe the secretory phase of the menstrual cycle.
Give Reasons
Missing of menses is the first indication of pregnancy.
Why menstrual cycle does not take place before puberty and during pregnancy?
Choose the correct order of phases of the menstrual cycle.
Ovulation in the human female normally takes place during the menstrual cycle ______.
Corpus luteum ______.
Exit from the cell cycle and remain dormant for long time by a cell is represented by one of the following phases of the cell cycle:
When does the corpus luteum degenerate?
Complete the following table by writing the name of the structure or the function of the given structure:
| Structure | Function | ||
| 1. | Corpus luteum | 1. | ______ |
| 2. | ______ | 2. | Produces male gametes in mass |
| 3. | Leydig cells | 3. | ______ |
| 4. | ______ | 4. | Stores the sperms until they mature and become mobile |
| 5. | Umbilical cord | 5. | ______ |
| 6. | Fallopian tube | 6. | ______ |
