Advertisements
Advertisements
प्रश्न
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
Advertisements
उत्तर
Menstrual cycle is regulated by hypothalamus through the pituitary gland. At the end of menstrual phase, the pituitary FSH gradually increases resulting in follicular development within the ovaries. As the follicles mature, Estrogen secretion increases resulting in a surge in (FSHe and LH) The surge of LH15 responsible for ovulation. LH also gonadotropins induces luteinisation. This leading to the formation of corpus luteum. Corpus luteum secretes progesterone and source estrogen which help in maintaining the interine endometrium for implantation.
APPEARS IN
संबंधित प्रश्न
Describe the roles of pituitary and ovarian hormones during the menstrual cycle in a human female.
Sketch the labelled diagram.
Menstrual cycle
Define: Menarche
Explain the menstruation phases in the menstrual cycle of a human female.
Follicle stimulating hormone : Development of oocyte : : Luteinizing hormone : ____________
Read the following passage and answer the question that follows:
Rahini and her parents were watching a television program. An advertisement flashed on the screen which was promoting the use of sanitary napkins. Rahini’s parents suddenly changed the channel, but she objected to her parents and explained the need and importance of such an advertisement.
Do you think that Rahini’s objection towards her parents was correct? If so, Why?
What are the phases of the menstrual cycle? Indicate the changes in the ovary and uterus.
The luteal phase of the menstrual cycle is also called the secretory phase. Give reason.
Find the wrongly matched pair.
Explain the various phases of the menstrual cycle.
During which phase of the menstrual cycle does the endometrium thicken up to 8-10 mm?
Identify the phase of the menstrual cycle during which there is a peak in the level of progesterone.
Progesterone peaks during which phase of the menstrual cycle?
Match the Columns.
| Column I | Column II | ||
| i. | Proliferative phase | a. | Breakdown of the endometrial lining |
| ii. | Secretory phase | b. | Follicular phase |
| iii. | Menstruation | c. | Luteal phase |
Corpus luteum develops under the influence of ______.
Which one of the following statements is incorrect about menstruation?
Hormones responsible for menstrual cycle are produced from ______.
Answer the following questions by observing the diagram of menstrual cycle:
- What is the period of menstruation?
- On which day does ovulation occur during the menstrual cycle?
- In the menstrual cycle which reproductive organs undergo changes?
- Which period is said to be the period of regeneration of endometrium?
- Which period is said to be the period of secretions of glands in endometrium?
The enlarged mature follicle bursts to release the egg.
On approximately which day of the menstrual cycle does ovulation occur?
