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प्रश्न
Name the hormones involved in regulation of spermatogenesis.
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उत्तर
Hormones that regulate spermatogenesis include GnRH, LH, FSH and androgens. After sexual maturity, spermatogenesis starts due to the secretion of gonadotropin releasing hormone (GnRH) from the hypothalamus of the brain. GnRH acts on the pituitary gland and stimulates secretion of luteinizing hormone (LH) and follicle stimulating hormone (FSH). LH induces the Leydig cells of the testis to produce male sex hormones called androgens. High levels of androgens stimulate the process of spermatogenesis. FSH acts on the Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis.
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संबंधित प्रश्न
Male and female gametes are ______.
The fusion of the male and the female gametes is called ______.
Briefly describe the process of spermatogenesis.
Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.
Multiple choice question.
The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
The glandular accessory organ which produces the largest proportion of semen is ____________.
Mention the differences between spermiogenesis and spermatogenesis.
At what stage of development are the gametes formed in newborn male and female?
Give a schematic representation of spermatogenesis and oogenesis in humans.
Identify the given image and label its parts marked as a, b, c and d
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
Identify the diploid cell.
Formation of ____________ is an indication of the termination of oogenesis.
Which is the correct order of steps occurring during spermatogenesis?
Identify the enzyme released by the sperm which has lytic activity.
Draw a labelled diagram of a Graafian Follicle.
After ovulation, Graafian follicle regresses into ______.
By which process sperms released from the seminiferous tubules?
There is no cell division involved in ______.
Spermiation is the process of the release of sperm from ______.
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
The nutritive cells found in seminiferous tubules are ______.
In oogenesis haploid egg is fertilised by sperm at which stage?
Mark the odd one.
Aquatic animals in which fertilisation occurs in water are said to be
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
Draw a labelled diagram of a section through the ovary.
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:
Which gamete is produced through oogenesis?
