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प्रश्न
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
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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.
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संबंधित प्रश्न
Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase.
Explain the events that occur in a graafian follicle at the time of ovulation and thereafter.
Explain the ovarian and uterine events that occur during a menstrual cycle in a human female under the influence of pituitary and ovarian hormones respectively.
Choose the correct answer from the four options given below :
On which day of the menstrual cycle does ovulation take place ?
Multiple Choice Question:
The onset of menstruation in the female is termed
Meanrch, menstrual cycle, and menopause are controlled by ______.
Read the following passage and answer the question that follows:
Rahini and her parents were watching a television programme. 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.
What is first menstruation called? When does it occur?
In humans, the menstrual cycle is generally of ______.
The temporary endocrine gland in humans is ______.
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______.
The mammalian corpus luteum produces ______.
Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?
Level of which hormones are at their highest during the luteal phase (second half of the cycle) of the menstrual cycle?
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
The peak observed in Subject 1 and 2 is due to ______
In case the ova does not fertilize, which of the following events will take place?
When does the corpus luteum degenerate?
In the figure given below, parts A and B show the level of hormones which influence the menstrual cycle. Study the figure and answer the questions that follow:
- Name the organs which secrete the hormones represented in parts A and B.
- State the impact of the hormones in part B on the uterus of the human female during 6 to 15 days of the menstrual cycle.
Which of the following statement is correct?
Name the following:
Two layers of the wall of uterus.
Longest phase of menstrual cycle is ______.
