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प्रश्न
In humans, there are ____________ pairs of chromosomes.
विकल्प
22
23
44
46
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उत्तर
In humans, there are 23 pairs of chromosomes.
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संबंधित प्रश्न
Draw a labelled diagram of L.S. of human testis.
Differentiate
Urinogenital duct and Ureter.
Name the Following
The structure in which testes are present in man.
Write the functional activity of the following structure:
Seminiferous tubules
Find an odd one out.
The spermatozoa from seminiferous tubules pass into ______.
The ejaculatory ducts open into the ______.
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is ______.
Temperature of the scrotum which is necessary for the functioning of testis is always ______ around below body temperature.
The function of the secretion of prostate gland is to ______.
Vasa efferentia exist in between:
Give reason: Testes are located outside the body cavity in scrotal sacs.
List two roles of the Testis in the human reproductive system.
Answer the following question based on the human male reproductive system:
In which organ sperms are formed?
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 |
Draw a labelled diagram of the male reproductive system.
State very briefly the chief function of the following:
Prostate gland
State very briefly the chief function of the following:
Sperm duct (vas deferens)
Given below is a group of terms. In the group, one pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Follicle cells : Ova :: ______ : Sperms.
