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प्रश्न
Name the function of the following:
Corpus luteum
State the main function of the corpus luteum.
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उत्तर
It secretes progesterone, a hormone that prepares the uterus for implantation. If implantation fails, the corpus luteum goes inactive and degenerates. If an embryo is implanted, the corpus luteum continues to release progesterone until the fourth month of pregnancy, when the placenta takes over this function.
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संबंधित प्रश्न
The Graafian follicle, after ovulation turns into a hormone producing issue called Corpus callosum.
Mention one significant difference between Hormones of ovulatory phase and hormones of luteal phase
How can the scientific understanding of the menstrual cycle of human females help as a contraceptive measure?
Give appropriate biological or technical terms for the following:
The onset of menstruation in a young girl
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.
Briefly describe the secretory phase of the menstrual cycle.
Define: Menarche
Give Reasons
The chances of pregnancy to occur are most favourable on or about the 14th day of the menstrual cycle. Explain.
Follicle stimulating hormone : Development of oocyte : : Luteinizing hormone : ____________
Why menstrual cycle does not take place before puberty and during pregnancy?
Answer the following type of question Assertion (A) and Reason (R).
(A) - Ovulation is the release of the ovum from the Graafian follicle.
(R) - It occurs during the follicular phase of the menstrual cycle.
The life of corpus luteum is generally about ______ days in the absence of pregnancy
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 |
Calculate the number of spermatozoa produced by a single primary spermatocyte.
When does ovulatory phase occur?
Identify the INCORRECT statement.
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______.
Secretion of progesterone by corpus luteum is initiated by ______.
Which set is similar?
Level of which hormones are at their highest during the luteal phase (second half of the cycle) of the menstrual cycle?
Corpus luteum ______.
Which one of the following statements is incorrect about menstruation?
Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower.
Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.
Hormones responsible for menstrual cycle are produced from ______.
The menstrual cycle begins with ______
Identify the correct statement from the following:
A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.
What are the events taking place in the ovary and uterus during follicular phase of the menstrual cycle.
The figure show a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic.
Write a short note on Proliferative Phase.
Choose the odd one out from the following terms and name the category to which the others belong:
The onset of menstruation in a human female is called ______.
The enlarged mature follicle bursts to release the egg.
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.
