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प्रश्न
Draw a diagram of a mature human sperm. Label any three parts and write their functions.
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उत्तर
- Head: It the flat oval part of the human sperm that contains the nucleus, containing genetic material, and acrosome, a small anterior part which is formed from Golgi complex. It secretes hyaluronidase enzyme which helps in the entry of sperm into the egg.
- Middle Piece: It is the middle, cylindrical portion of the sperm, which contain numerous mitochondria. They provide energy (ATP) to the sperm for its movement.
- Tail: It is the long, tapering structure composed of cytoplasm. It helps in the movement of the sperms inside the uterus.
संबंधित प्रश्न
find odd one from following: Thymine, Cytosine, Adenine, Pepsin.
List the structures, in their correct sequence, through which the sperms must pass from the time they are produced in the testes to the time they leave the urethra.
Describe the functions of the following:
Testis
Given below is the outline of the male reproductive system. Name the parts labelled 1 to 8 and state their functions. Also name the corresponding structure of part (4) in the female reproductive system.
Complete the following sentences with appropriate word:
The surgical sterilization of males is known as _________.
Each testis is connected to the wall of scrotum by short. fibromuscular band called ______.
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is ______.
Which of the following hormone maintains the function of male sex accessory gland and ducts?
Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairs:
| Column I | Column II | ||
| (a) | Leydig Cells | 1. | Lack of thyroxine in children |
| (b) | Stoma | 2. | 12 pairs |
| (c) | Ova | 3. | Testosterone |
| (d) | Cranial nerve | 4. | Diffusion of respiratory gases |
| (e) | Cretinism | 5. | Haploid cells |
| 6. | 31 Pairs | ||
| 7. | Diploid cells |
Name these:
3 male accessory glands in humans.
