Select the correct statements with respect to diseases and immunisation from Biology Human Health and Disease Class 12 Nagaland Board
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Class 10 Class 12

Select the correct statements with respect to diseases and immunisation

  • if due to some reason B and T - lymphocytes are damaged, the body will not produce antibodies against a pathogen

  • injection of dead/inactivated pathogens causes passive immunity

  • certain protozoans have been used to mass produce hepatitis B vaccine

  • injection of snake antivenom against snake bite is an example of active immunisation.


A.

if due to some reason B and T - lymphocytes are damaged, the body will not produce antibodies against a pathogen

The primary and secondary immune responses are carried out with the help of two special types of lymphocytes present in our blood, i.e, B - lymphocytes and T- lymphocytes, The B- lymphocytes produce an array ( a range) of proteins in response to pathogens into our blood to fight with them. These proteins are called antibodies. The T- cells themselves do not secrete antibodies but the help B- cells to produce them.

The primary and secondary immune responses are carried out with the help of two special types of lymphocytes present in our blood, i.e, B - lymphocytes and T- lymphocytes, The B- lymphocytes produce an array ( a range) of proteins in response to pathogens into our blood to fight with them. These proteins are called antibodies. The T- cells themselves do not secrete antibodies but the help B- cells to produce them.

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It is a state of complete, physical, mental and social well being of a person.
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What is the significance of ‘Typhoid Mary’ ?

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Name three important aspects to maintain good health.

(i) Balanced diet (ii) Personal hygiene and (iii) Regular exercise.
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List advantages of good health.

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What is disease ?

Malfunctioning of one or more organs characterised by signs and symptoms is called disease.
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