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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
The human female gonads are ovaries. A maturing egg in the ovary is present in a sac of cells called ______ (1). As the egg grows larger, the follicle enlarges and gets filled with a fluid and is now called the ______ (2) follicle. The process of releasing the egg from the ovary is called ______ (3). The ovum is picked up by the oviducal funnel and fertilization takes place in the ______ (4). In about a weak the blastocyst gets fixed in the endometrium of the uterus and this process is called ______ (5).
Give appropriate biological or technical terms for the following:
The onset of menstruation in a young girl
Name the Following
The onset of menstruation in a young girl at about the age of 13 years.
How many pairs of testis are present in human male?
Explain the ovarian cycle with its different phases.
What is the menstrual cycle?
Find the wrongly matched pair.
Which one of the following events occurs during the secretory phase of the menstrual cycle?
How long does the secretory phase of the menstrual cycle last?
____________ is transformed to corpus luteum during luteal phase of the menstrual cycle.
In the human female, menstruation can be deferred by the administration of ______.
Which one of the following events is correctly matched with the time period in a normal menstrual cycle?
Proliferative phase of menstrual cycle, is also called ______.
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 ______
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?
Give a reason for the following:
The second half of the menstrual cycle is called the luteal phase as well as the secretory phase.
Longest phase of menstrual cycle is ______.
Which of the following statements are correct regarding female reproductive cycle?
- In non-primate mammals cyclical changes during reproduction are called oestrus cycle.
- First menstrual cycle begins at puberty and is called menopause.
- Lack of menstruation may be indicative of pregnancy.
- Cyclic menstruation extends between menarche and menopause.
Choose the most appropriate answer from the options given below:
