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प्रश्न
The following is the illustration of the sequence of ovarian events (a − 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.
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उत्तर
(i) Figure 'f' illustrates ovulation. It represents the ovulatory stage of oogenesis.
(ii) Progesterone is the ovarian hormone released during ovulation. Follicle stimulating hormone (FSH) and Luteinizing hormone (LH) are the pituitary hormone released during ovulation.
(iii) In anticipation of receiving the fertilised egg, the endometrium of the uterus gets thickened and also the blood supply to the endometrium increases.
(iv) In the figure, (c) stage represents the secondary follicle and the (h) stage represents the degenerating corpus luteum.
|
Secondary follicle |
Corpus luteum |
|
It is Surrounded by layers of granulosa cells |
Layers of granulosa cells absent |
|
Presence of theca layer |
No theca layer is present |
(v) Labeled diagram of the human ovum prior to fertilization.
संबंधित प्रश्न
The process of release of the ovum from a mature follicle is called ______.
The process which the sperm undergoes before penetrating the ovum is ____________.
During spermatogenesis, spermatogonium grows in size to become ______.
The principal tail piece of human sperm shows the microtubular arrangement of ______.
Which of the following are called dual gland?
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
Germ cells present in the seminiferous tubules undergo ______
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
Distinguish between human sperm and ovum.
Match List - I with List - IІ.
| List - I | List - II |
| A. Head | I. Enzymes |
| B. Middle piece | II. Sperm motility |
| C. Acrosome | ΙII. Energy |
| D. Tail | IV. Genetic material |
Choose the correct answer from the options given below:
