Question

The following is the illustration of the sequence of ovarian events "$a$" to "$i$" in a human female:
(a) Identify the figure that illustrates corpus luteum and name the pituitary hormone that influences its formation.
(b) Specify the endocrine function of corpus luteum. How does it influence the uterus? Why is it essential?
(c) What is the difference between "$d$" and "$e$"?
(d) Draw a neat labelled sketch of Graafian follicle.

Answer 1

a) Figure 'g' represents the degenerating corpus luteum. Hormone LH from pituitary stimulates its formation.

b) Corpus luteum is responsible for the secretion of the hormone progesterone. Progesterone is essential for maintaining the thickening of the wall of the uterus which is required for the implantation of the fertilized ovum and also throughout the pregnancy.

c) Figure 'd' represents developing secondary follicle while figure 'e' represents mature tertiary follicle.

d) The figure given above shows the labelled sketch of Graafian follicle.