Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
- Phase C is the ovulation phase, while Phase D is the luteal phase.
- The Corpus Luteum is the structure identified with the label F. The Corpus Luteum produces progesterone, which promotes a healthy environment for the developing fetus.
- Progesterone levels are very low or negligible in phase C, while they are highest in phase D.
- The hormone present in the urine that confirms pregnancy in human beings is hCG [Human Chorionic Gonadotropin hormone].
- The structure labeled as 'E' is identified as a Graafian follicle, and the hormone released by it is estrogen.
APPEARS IN
संबंधित प्रश्न
Draw a graafian follicle and label antrum and secondary oocyte.
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).
Define Amenorrhea
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.
Name the Following
The onset of menstruation in a young girl at about the age of 13 years.
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?
Corpus luteum develops under the influence of ______.
The correct sequence of hormone secretion from the beginning of menstruation is ______.
Secretion of progesterone by corpus luteum is initiated by ______.
Proliferative phase of menstrual cycle, is also called ______.
