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प्रश्न
In humans, there are ____________ pairs of chromosomes.
पर्याय
22
23
44
46
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उत्तर
In humans, there are 23 pairs of chromosomes.
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संबंधित प्रश्न
With the help of a neat, labelled diagram describe the human male reproductive system.
Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.
Describe the structure of a seminiferous tubule.
The external layer of connective tissue sheath of human testis is __________.
Give appropriate biological/technical terms for the following:
The accessory gland in human males whose secretion activates the
sperms.
Draw a labelled diagram of L.S. of human testis.
Which one of the following is the correct route that a sperm follows when it leaves the testis of a mammal ?
Given below is a diagram of the lateral section of the testis of a man. Study the same and answer the questions that follow:
(i) Label the parts numbered 1 to 4 of the diagram.
(ii) State the functions of the parts labeled 1 and 3.
(iii)What is the significance of the testes being located in the scrotal sac outside the abdomen?
(vi)What is the role played by the inguinal canal?
(v) What is semen?
Explain the term Vasectomy.
Name the Following
The accessory gland in human males whose secretion activates the sperms.
Give Technical Term:
Name the male gamete of a mammal.
Identify the INCORRECTLY labelled structure in the given diagram of the male reproductive system.
In the male reproductive system, the vasa efferentia opens into the ______.
Occurrence of Leydig’s cells and their secretion is ______.
Match between the following representing parts of the sperm and their functions and choose the correct option.
| Column A | Column B | ||
| A. | Head | i. | Enzymes |
| B. | Middle piece | ii. | Sperm motility |
| C. | Acrosome | iii. | Energy |
| D. | Tail | iv. | Genetic material |
The function of the secretion of prostate gland is to ______.
Answer the following question based on the human male reproductive system:
In which organ sperms are formed?
Answer the following question based on the human male reproductive system:
What is the work of vas deferens?
The packing tissues between the coils of the seminiferous tubules are called as ______.
