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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
Give the name and function for ‘A’ and ‘B’ from the diagram given below
The process of release of the ovum from a mature follicle is called ______.
Briefly describe the process of spermatogenesis.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
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?
In meiosis, the number of chromosomes becomes ___________.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
The process which the sperm undergoes before penetrating the ovum is ____________.
Formation of ____________ is an indication of the termination of oogenesis.
How many autosomes does a human primary spermatocyte have?
After ovulation, Graafian follicle regresses into ______.
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
Which of the following contains the actual genetic part of a sperm?
At what stage of life is oogenesis initiated in a human female?
Which one is released from the ovary?
Layers of an ovum from outside to inside is ______.
Which of the following is a primary sex organ of female?
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Which cell division is involved in the formation of secondary oocytes?
The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:
Follicular atresia is:
Which of the following cells during gametogenesis is normally diploid?
What is spermatogenesis?
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:
At the onset of puberty, gonadotropin releasing hormone is secreted by ______.
In which structures does spermatogenesis occur?
In which organ does oogenesis take place?
Which of the following phases are shared by both spermatogenesis and oogenesis?
