Biology · Textbook solutions

Human Health and Disease

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 25 questions

Exercises

25 q

Ex 7 Q1 $What are the various public health measures, which you would suggest as safeguard against infectious diseases?$
Ex 7 Q2 $In which way has the study of biology helped us to control infectious diseases?$
How does the transmission of each of the following diseases take place?
Ex 7 Q3 (a) $Amoebiasis$
Ex 7 Q3 (b) $Malaria$
Ex 7 Q3 (c) $Ascariasis$
Ex 7 Q3 (d) $Pneumonia$
Ex 7 Q4 $What measure would you take to prevent water-borne diseases?$
Ex 7 Q5 $Discuss with your teacher what does 'a suitable gene' means, in the context of DNA vaccines.$
Ex 7 Q6 $Name the primary and secondary lymphoid organs.$
The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its full form:
Ex 7 Q7 (a) $MALT$
Ex 7 Q7 (b) $CMI$
Ex 7 Q7 (c) $AIDS$
Ex 7 Q7 (d) $NACO$
Ex 7 Q7 (e) $HIV$
Differentiate the following and give examples of each:
Ex 7 Q8 (a) $Innate and acquired immunity$
Ex 7 Q8 (b) $Active and passive immunity$
Ex 7 Q9 $Draw a well-labelled diagram of an antibody molecule.$
Ex 7 Q10 $What are the various routes by which transmission of human immuno-deficiency virus takes place?$
Ex 7 Q11 $What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?$
Ex 7 Q12 $How is a cancerous cell different from a normal cell?$
Ex 7 Q13 $Explain what is meant by metastasis.$
Ex 7 Q14 $List the harmful effects caused by alcohol/drug abuse.$
Ex 7 Q15 $Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?$
Ex 7 Q16 $Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.$
Ex 7 Q17 $In your view what motivates youngsters to take to alcohol or drugs and how can this be avoided?$