Biology

Human Health and Disease

Question:

Draw a well-labelled diagram of an antibody

Answer:


ncert-solutions-for-class-12-biology-human-health-and-disease-1

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Human Health and Disease

Q 1.

List the harmful effects caused by alcohol/drug abuse.

Q 2.

How is a cancerous cell different from a normal cell?

Q 3.

What are the various public health measures, which you would suggest as safeguard against infectious diseases?
 

Q 4.

Explain what is meant by metastasis.

Q 5.

What are the various routes by which trans-mission of human immunodeficiency virus takes place?

Q 6.

What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?

Q 7.

In your view what motivates youngsters to take to alcohol or drugs and how can this be avoided?

Q 8.

In which way has the study of biology helped us to control infectious diseases?

Q 9.

What measures would you take to prevent water borne diseases?

Q 10.

Draw a well-labelled diagram of an antibody

Q 11.

The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its fall form:
(a)MALT (b) CMI
(c)AIDS (d)NACO
(e)HIV

Q 12.

Name the primary and secondary lymphoid organs.

Q 13.

Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.

Q 14.

Discuss with your teacher what does ‘a suitable gene' means, in the context of DNA vaccines.

Q 15.

Differentiate the following and give examples of each
(a)Innate and acquired immunity
(b)Active and passive immunity

Q 16.

Hovy does the transmission of each of the following diseases take place?
(a)Amoebiasis (b) Malaria
(c)Ascariasis (d) Pneumonia

Q 17.

Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?