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प्रश्न
Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase.
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उत्तर
(a) The menstrual cycle is the reproductive cycle in all primates and begins at puberty (menarche).
- Menses takes place on the 3rd–5th day of the menstrual cycle of 28 days.
- The production of LH is considerably reduced.
- This causes degeneration of the corpus luteum and reduction in the production of progesterone and oestrogen.
- The uterine endometrium breaks down and menstruation starts.
- Cells of the endometrium, secretions, blood and the unfertilised ovum constitute menstrual flow.
During this phase, the levels of ovarian and pituitary hormones are low.
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संबंधित प्रश्न
the biological/technical terms for Fixing of developing zygote on the uterine wall.
Complete the following by filling in the blanks 1 to 5 with appropriate words:
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).
Multiple Choice Question:
The onset of menstruation in the female is termed
Why menstrual cycle does not take place before puberty and during pregnancy?
Painful menstruation is termed as ____________.
How long does the secretory phase of the menstrual cycle last?
____________ is transformed to corpus luteum during luteal phase of the menstrual cycle.
Secretion of progesterone by corpus luteum is initiated by ______.
The enlarged mature follicle bursts to release the egg.
What does the Latin term 'mensis' mean in the context of the menstrual cycle?
