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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
Name the functions - Acrosome of sperm.
What is gamete formation?
The male sex hormone testosterone is secreted from ____________.
At what stage of development are the gametes formed in newborn male and female?
Describe the structure of the human ovum with a neat labelled diagram.
Expand the acronym.
LH
During spermatogenesis, spermatogonium grows in size to become ______.
Complete the analogy.
1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.
The secondary oocyte enter into the fallopian tube through the ______.
Identify the diploid cell.
Which of the following occurs during maturation phase of spermatogenesis?
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
The immature male germ cells differentiates into ______ at the end of meiosis I.
Four primary spermatocytes give rise to ______.
Which of the following is diploid?
Extrusion of second polar body from egg nucleus occurs ______.
Identify the wrong statement from the following.
Spermiation is the process of the release of sperm from ______.
Gray crescent is the area ______.
The nutritive cells found in seminiferous tubules are ______.
Which of the following contains the actual genetic part of a sperm?
Layers of an ovum from outside to inside is ______.
Which of the following are called dual gland?
The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n = 50 shall be:
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
At the onset of puberty, gonadotropin releasing hormone is secreted by ______.
