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प्रश्न
Given below are the groups of certain substances of particular categories. Mention the category of each group and identify the wrong example giving reason.
Tears, skin, nasal secretion, HCl (in stomach)
उत्तर
Tears, skin, nasal secretion, HCl (in stomach)
Germ-killing secretions. Skin is a wrong example as it is a protective mechanical barrier and prevents the entry of germs in our body.
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संबंधित प्रश्न
Write short (2-3 sentences) note on vaccination.
Define the following:
Immunity
The principle of vaccination is to produce immunity against a disease. Explain.
Name any three vaccines and the diseases for which they provide immunity.
Mention if the following statement id true (T) or false (F).
Vaccine provides the body with active immunity.
Expand the following.
DPT-
State whether true or false. If false, correct the statement.
The process of vaccination was developed by Jenner.
The disease that is eliminated totally by the vaccination process is ______.
Define the following:
Antibiotics
What are recombinant DNA vaccines? Give two examples of such vaccines. Discuss their advantages.
