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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.
संबंधित प्रश्न
Describe the role of pituitary and ovarian hormones during the menstrual cycle in a human female.
Explain the events that occur in a graafian follicle at the time of ovulation and thereafter.
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).
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.
Explain the role of hormones during the menstrual cycle.
Describe the phases of the menstrual cycle and their hormonal control.
State the names of four hormones which control menstrual cycle.
Write the answers to the following questions by observing the figure below.
- What does the figure above show?
- Which organs are involved in this process?
- Which hormones are involved in this process?
- After how many days do these changes happen again?
- Explain your opinion about the statement that a woman's body is impure while the above process is going on.
Read the following passage and answer the question that follows:
Rahini and her parents were watching a television program. 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.
Do you think that Rahini’s objection towards her parents was correct? If so, Why?
The menstrual cycle ceases 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.
During which phase of the menstrual cycle does the endometrium thicken up to 8-10 mm?
Progesterone peaks during which phase of the menstrual cycle?
In humans, the menstrual cycle is generally of ______.
How long does the secretory phase of the menstrual cycle last?
Calculate the number of spermatozoa produced by a single primary spermatocyte.
When does ovulatory phase occur?
Corpus luteum develops under the influence of ______.
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______.
Withdrawal of which of the following hormones is the immediate cause of menstruation?
In the human female, menstruation can be deferred by the administration of ______.
Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.
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. |
The peak observed in Subject 1 and 2 is due to ______
When does the corpus luteum degenerate?
Menstrual flow occurs due to lack of ______.
A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.
Spermatogenesis is induced by ______.
Write a short note on Secretory Phase.
Choose the odd one out from the following terms and name the category to which the others belong:
Name these:
4 phases of the menstrual cycle.
Match Column I and Column II with respect to the menstrual cycle.
| Column I | Column II |
|---|---|
| i. Menstrual phase | c. Secretion of inhibin |
| ii. Follicular phase | b. Development of the primary follicle |
| iii. Ovulatory phase | a. Rapid secretion of LH |
| iv. Secretory phase | d. Secretion of estrogen |
Choose the correct option.
