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प्रश्न
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Hyaluronidase.
- Is it an enzyme or simply a protein?
- What is its function?
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उत्तर
- Hyaluronidase is an enzyme.
- The acrosome at the top of the head of the sperm secretes an enzyme (hyaluronidase), which facilitates entry of the sperm into the egg by dissolving the wall of the ovum.
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संबंधित प्रश्न
State whether the following statements are TRUE (T) or FALSE (F):
Rewrite the wrong statement by correcting only one word either at the beginning or at the end of the sentence.
Fertilisation occurs in vagina.
State whether the following statements are TRUE (T) or FALSE (F):
Rewrite the wrong statement by correcting only one word either at the beginning or at the end of the sentence.
Nutrition and oxygen diffuse from the mother’s blood into the foetus’s blood through amnion.
Describe the functions of placenta
The circulatory system of the fetus and that of the mother are never connected directly. What are the advantages?
Differentiate
Uterus and Urethra.
The diagram given below is that of a developing human foetus in the womb. Study the same and then answer the questions that follow:
- Name the parts '1' to '5' indicated by guidelines.
- What term is given to the period of development of the foetus in the womb?
- How many days does the foetus take to be fully developed?
- Mention two functions of the parts labelled ‘2’ other than its endocrine function.
- Name the hormone (anyone) produced by the part labelled ‘2’.
- What is the function of the part marked ‘3’?
Study the diagram given below and then answer the questions that follow:
(i) Name the parts labeled 1 and 2. State the function of each part.
(ii) State any one function of the amniotic fluid.
(iii) What is the role of the umbilical cord in the development of the fetus?
(iv) Name the part in the diagram which is endocrine in nature.
Write the functional activity of the following structure:
Amnion
Write the functional activity of the following structure:
Placenta
How are carbon dioxide and urea, excreted by the foetus, removed?
