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प्रश्न
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?
उत्तर
- The menstrual cycle is a natural process, controlled by four hormones. Those four hormones are follicle-stimulating hormone (FSH), luteinizing hormone (LH), estrogen, and progesterone.
- The cycle consists of three phases-menstrual phase, the proliferative phase, and secretory phase.
- 14 days.
- If the embryo is implanted, repetition of this cycle is temporarily stopped till the parturition and thereafter period of breastfeeding.
- If oocyte is not fertilized within 24 hours, corpus luteum becomes inactive and transforms into corpus Albicans. Due to this, secretion of estrogen and progesterone stops completely. Endometrium starts to degenerate in absence of these two hormones.
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संबंधित प्रश्न
Describe the changes that occur in ovaries and uterus in human female during the reproductive cycle.
Name the function of the following:
Corpus luteum
the Biological/technical term for Complete stoppage of menstrual cycle in females
Give a significant point of difference between Oestrous and Menstrual cycle.
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.
Observe the figure and answer the questions given below.
a) What does the above figure indicate?
b) Which human organs are involved in this process?
c) Name the hormones responsible for this process.
d) After how many days these repetitive changes take place?
e) ‚A woman should stay away from others, as her body is impure during this process.‛ What is your opinion about this statement? Elaborate it.
Explain the role of hormones during the menstrual cycle.
Explain the menstruation phases in the menstrual cycle of a human female.
Name the Following
The onset of menstruation in a young girl at about the age of 13 years.
Give Technical Term:
The phase in the menstrual cycle in which the remnant of a follicle in the ovary turns to corpus luteum.
How many pairs of testis are present in human male?
Follicle stimulating hormone : Development of oocyte : : Luteinizing hormone : ____________
Painful menstruation is termed as ____________.
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.
In humans, the menstrual cycle is generally of ______.
Mainly which type of hormones control the menstrual cycle in human beings?
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. |
For subject 2 it is observed that the peak for hormone B has reached the plateau stage. After approximately how much time will the curve for hormone B descend?
What are the events taking place in the ovary and uterus during follicular phase of the menstrual cycle.
Spermatogenesis is induced by ______.
