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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
Draw a graafian follicle and label antrum and secondary oocyte.
the biological/technical terms for Fixing of developing zygote on the uterine wall.
Explain menstrual cycle in human females.
Sketch the labelled diagram.
Menstrual cycle
Explain the menstruation phases in the menstrual cycle of a human female.
Name the Following
The term used when females stop menstruation at the age of 45-50 years.
Follicle stimulating hormone : Development of oocyte : : Luteinizing hormone : ____________
Why menstrual cycle does not take place before puberty and during pregnancy?
Read the following passage and answer the question that follows:
Rahini and her parents were watching a television programme. 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.
What is first menstruation called? When does it occur?
What are the phases of the menstrual cycle? Indicate the changes in the ovary and uterus.
The menstrual cycle ceases during pregnancy.
Lack of which hormone results in menstrual flow?
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Which hormone is secreted by the developing secondary follicles?
Luteal phase is also known as ____________.
Corpus luteum develops under the influence of ______.
Secretion of progesterone by corpus luteum is initiated by ______.
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. |
If the peak of Hormone A does not appear in the study for Subject 1, which of the following statement is true?
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. |
Which structure in the ovary will remain functional in subject 2?
In case the ova does not fertilize, which of the following events will take place?
Hormones responsible for menstrual cycle are produced from ______.
When does the corpus luteum degenerate?
Menstruation is triggered by an abrupt decline in the amount of ______.
The main function of mammalian corpus luteum is to produce ______.
The growth of corpus luteum is initiated by:
At which stage of the menstrual cycle, both LH and FSH are high?
What are the events taking place in the ovary and uterus during follicular phase of the menstrual cycle.
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
Observe the figure and label it properly.
- Name the hormone that regulates the cycle.
- Name the phases in this cycle.
- What is the duration of ovulation phase?
- What happens if implantation occurs?
- What happens if implantation does not occur?
Describe hormonal control in various phases of the menstrual cycle.
Spermatogenesis is induced by ______.
The graph given below shows the number of primordial follicles per ovary in women at different ages. Study the graph and answer the questions that follow.
- What is the average age of the women at the onset of menopause?
- At what age are maximum primordial follicles present in the ovary, according to the given graph?
Name the following:
The permanent stoppage of menstruation in human females around the age of 45 years.
Name the following:
Two layers of the wall of uterus.
Complete the following table by writing the name of the structure or the function of the given structure:
| Structure | Function | ||
| 1. | Corpus luteum | 1. | ______ |
| 2. | ______ | 2. | Produces male gametes in mass |
| 3. | Leydig cells | 3. | ______ |
| 4. | ______ | 4. | Stores the sperms until they mature and become mobile |
| 5. | Umbilical cord | 5. | ______ |
| 6. | Fallopian tube | 6. | ______ |
The first menstruation is called ______.
What is menarche?
What hormone types control the menstrual cycle?
