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प्रश्न
Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces giving the name of the hormones responsible for the events shown.
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उत्तर
- FSH and estrogen
- LH
- Progesterone
APPEARS IN
संबंधित प्रश्न
Draw a graafian follicle and label antrum and secondary oocyte.
Uterus, Parturition, Fertilisation, Gestation, Implantation.
Describe the structure of a Graafian follicle.
Find the wrongly matched pair.
Menstruation begins due to ______.
The temporary endocrine gland in humans is ______.
Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.
Corpus luteum develops from ______.
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.
When does the corpus luteum degenerate?
After ovulation the collapsed ovarian follicle shrinks and becomes filled with cell to form:
At which stage of the menstrual cycle, both LH and FSH are high?
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?
Given below is the diagram depicting the menstrual cycle in human beings. Study it carefully and answer the questions that follow.
- Which phases are indicated by ‘C’ and ‘D’?
- Name the structures labelled ‘F’. What is its role?
- Explain the changes in the level of progesterone during phases ‘C’ and ‘D’.
- Which hormone present in the urine confirms pregnancy in human beings?
- Identify the structure labelled ‘E’. Name the hormone released by it.
Give a reason for the following:
The second half of the menstrual cycle is called the luteal phase as well as the secretory phase.
The egg is passed down through the oviduct by muscular contractions.
The onset of menstruation in women is called ______.
Name these:
4 phases of the menstrual cycle.
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. | ______ |
