Observation

The expected answers are as follows: 

Many candidates attempted this question and their performance was fair. In part(a) many candidates correctly stated effects of drug addiction. In part (b) majority of the candidates could not explain narcotics and hallucinogens.  In part (c) (i) many candidates correctly named diseases that affect the respiratory system. In part (c) (ii) many candidates could not state differences between inspiration and expiration in humans.
However, the expected answers are as follows:

. (a)      EFFECTS OF DRUG ADDICTION         

• it may lead to death
• mental disorder/lunacy/hallucination
• damage of vital organs e.g. liver, heart, lungs and kidney
• destruction of property
• diseases may set in
• waste of money/ selling valuable properties/ poverty
• abnormal behaviour/explained or named

(b)       EXPLANATION OF TYPES OF DRUGS
                                                                                            
(i) NARCOTICS
These are drugs; that induce sleep, relieve severe pain, huge thirst, sexual urge and fear. 

Examples

• heroin
• morphine
• codeine
• opium

                       
(ii) HALLUCINOGENS
These are drugs; capable of provoking changes of perception, thinking, self awareness and emotions

Examples

• L.S.D.,
• marijuana/hemp
• mescaline
• psilocybin

                                                                                                                                   
(c) (i) DISEASES THAT AFFECT RESPIRATORY SYSTEM

• whooping cough
• asthma
• bronchitis
• hay fever
• laryngitis
• influenza
• cold / catarrh
• pneumonia
• pharyngitis
• measles
• diphtheria
• small pox
• meningitis
• tuberculosis / T.B.
• lung cancer
• emphysema

           
(c) (ii) DIFFERENCES BETWEEN INSPIRATION AND EXPIRATION IN HUMANS