Advertisements
Advertisements
Question
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
Solution
Menstrual cycle is regulated by hypothalamus through the pituitary gland. At the end of menstrual phase, the pituitary FSH gradually increases resulting in follicular development within the ovaries. As the follicles mature, Estrogen secretion increases resulting in a surge in (FSHe and LH) The surge of LH15 responsible for ovulation. LH also gonadotropins induces luteinisation. This leading to the formation of corpus luteum. Corpus luteum secretes progesterone and source estrogen which help in maintaining the interine endometrium for implantation.
APPEARS IN
RELATED QUESTIONS
Explain the role of pituitary and the ovarian hormones in menstrual cycle in human females
Define the following term :
Ovulation
Give appropriate terms for each of the following process:
Fixing of developing zygote (blastocyst) on the uterine wall.
What is menstrual cycle? Describe it in brief.
Secretion of progesterone by corpus luteum is initiated by ______.
Ovulation in the human female normally takes place during the menstrual cycle ______.
The growth of corpus luteum is initiated by:
In the figure given below, parts A and B show the level of hormones which influence the menstrual cycle. Study the figure and answer the questions that follow:
- Name the organs which secrete the hormones represented in parts A and B.
- State the impact of the hormones in part B on the uterus of the human female during 6 to 15 days of the menstrual cycle.
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.
