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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.
Name the function of the following:
Corpus luteum
Explain the events that occur in a graafian follicle at the time of ovulation and thereafter.
The Graafian follicle, after ovulation turns into a hormone producing issue called Corpus callosum.
Give a significant point of difference between the oestrous and menstrual cycles.
Define the following term :
Ovulation
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Menarche is the stoppage of menstruation.
Multiple choice question.
Rupturing of follicles and discharge of ova is known as _______.
The menstrual cycle ceases during pregnancy.
All occur during follicular phase of menstrual cycle, EXCEPT
Which one of the following is the correct matching of the events occurring during 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 ______
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. |
Subject 2 has a higher level of hormone B, which is ______
Define ovulation.
Which of the following events is not associated with ovulation in human females?
The main function of mammalian corpus luteum is to produce ______.
About which day in a normal human menstrual cycle does rapid secretion of LH (Popularly called LH Surge) normally occurs?
Why are menstrual cycles absent during pregnancy?
Given below is a group of terms. In the group, one pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Follicular phase: 5-12 days:: Luteal phase : ______ days.
What condition can cause a temporary stop in the menstrual cycle besides pregnancy?
