The following is the illustration of the sequence of ovarian events (a to i) in a human female.

i) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.

(ii) Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event.

(iii) Explain the changes that occur in the uterus simultaneously in anticipation.

(iv) Write the difference between c and h.

(v) Draw a labeled sketch of the structure of a human ovum prior to fertilization.

Solution

(i) Figure 'f' illustrates ovulation. It represents the ovulatory stage of oogenesis.

(ii) The changes that cause ovulation are because of the change in level of the pituitary and ovarian hormones. The pituitary secrets two hormones called Follicle stimulating hormone (FSH) and Luteinizing hormone (LH). Estrogen is the ovarian hormone released during ovulation. The FSH and LH stimulate follicular development and secretion of estrogen from the primary follicles, the rapid secretion of LH induces graffian follicles to release and release ovum.

(iii) In anticipation of receiving the fertilised egg the primary follicles in the ovary grow to become graffian follicles and simultaneously the endometrium of the uterus regenerates and through proliferation and the blood supply is increased.

(iv) In the figure, (c) stage represents the secondary follicle and the (h) stage represents the degenerating corpus luteum.

Secondary follicle	Corpus luteum
1.It is found in the menstrual stage	1.It is found in the luteal stage.
2.It is Surrounded by layers of granulosa cells	2.Layers of granulosa cells are absent
3.Theca layer is present.	3.No theca layer is present

(v) Labeled diagram of the human ovum prior to fertilization.

Some More Questions From Human Reproduction Chapter

For Daily Free Study Material Join wiredfaculty

Human Reproduction

Some More Questions From Human Reproduction Chapter

The middle piece of human sperm contains :

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

Scrotum communicates with abdominal cavity through :

How many spermatozoa or sperms are present in human ejaculate ?

Acrosome is a part of:

Humans are :

Menstrual cycle occurs in :

Spermatozoa are produced in the .................. tubules of testes while ova are formed in the .................. of ovaries.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Location