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Human Health and Disease

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CBSE Gujarat Board Haryana 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.

Name three important aspects to maintain good health.

(i) Balanced diet (ii) Personal hygiene and (iii) Regular exercise.

What is the significance of ‘Typhoid Mary’ ?

Typhoid Mary was a Typhoid carrier who continued to spread typhoid for several years through food she prepared.

List advantages of good health.

Healthy people are more efficient and productive. good health also brings prosperity and people live long. It also reduces infant and maternal mortality.

What is health ?

It is a state of complete, physical, mental and social well being of a person.

What is disease ?

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

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