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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
Define spermiogenesis.
Sex organs produce gametes which are diploid.
Give a schematic representation of spermatogenesis and oogenesis in humans.
During spermatogenesis, spermatogonium grows in size to become ______.
Identify the diploid cell.
First meiotic division is observed in ____________.
By which process sperms released from the seminiferous tubules?
It The cell division in secondary oocyte is suspended at ______.
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.
During spermatogenesis meiosis occurs in ______.
