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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
The fusion of the male and the female gametes is called ______.
Define spermiogenesis.
Draw a labelled diagram of sperm.
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
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Draw a labeled sketch of a spermatozoan.
Expand the acronym.
LH
Select the correct sequence of oogenesis.
Four primary spermatocytes give rise to ______.
Which of the following is diploid?
Which of the following events take place during spermatogenesis?
How many sperms are formed from a secondary spermatocyte?
Acrosome reaction in sperm is triggered by ______.
By which process sperms released from the seminiferous tubules?
It The cell division in secondary oocyte is suspended at ______.
The cell which undergoes meiosis I during spermatogenesis is the ______.
Identify the wrong statement from the following.
Besides activating the egg another role of a sperm is to carry ______ to egg.
Preparation of sperm before penetration of ovum is ______.
Which of the following groups of cells in the male gonad, represent haploid cells?
1st polar body is formed at which stage of oogenesis?
Which of the following are called dual gland?
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 ______.
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. What are the processes through which these events take place?
Draw a neat and labelled diagram of spermatogenesis.
