What is the method of testing for HIV and is it accurate?       111
How are babies preserved in incubators?                         112
What is artificial blood?                                       113
How does blood clot?                                            115
What is the difference between human and animal blood?          117
What differentiates blood groups?                               119
What is the basis behind human blood grouping?                  120
How long can we survive without oxygen?                         121
Why is the air we breathe out on a cold day visible?            121
Why do people not get cancer in the heart?                      122
Why is alcohol used in cough syrups?                            123
What causes blood sugar in diabetic patients?
How is it initiated?                                            124
What chemical (in tablets) causes sedation and
how does it work?                                               126
What does ‘Schedule-H drug’ printed on medicine
bottles indicate?                                               127
Why do doctors prescribe some medicines after food and
some before food?                                               128
What is dry eye syndrome? Would it help to have an air
purifier in the house?                                          129
What causes myopia? Can it be cured with the
latest medical techniques?                                      130
What causes common fever?                                       131
Why do we shiver when it is cold?                               132
Does bleeding the patient actually help any medical condition?  133
Why do people get cramps and how does massage help?             134
Will I grow up to be short like my mother or tall
like my father?                                                 135
How to beat the heat during summer?                             136
What is dandruff?                                               137
How does antidandruff shampoo work?                             138
It is said that we should eat fruit and vegetables and not
too much fat. But Inuit eat fat, meat and fish.
Why don’t they get heart disease or scurvy?                     138
Why do people catch colds and flu more often in the winter?
Are viruses transmitted more easily in damp air, is the
resistance of the population reduced by the cold and lack
of sunlight, or do the viruses simply take advantage of
the greater time we spend indoors with each other?              140
Why do doctors check for the pulse and heart beat during
consultation? What does it indicate and why is it felt only
on the wrist and neck regions?                                  140
What is atrial fibrillation?                                    141
What are blue babies?                                           143
What causes hiccups?                                            144
Why is vaccination against malaria difficult?                   145
Why do moles form on the human body?                            147
What is a mole? Do animals have them as well?                   149
Sharing a needle is said to spread AIDS virus. Mosquitoes
also use a needle like proboscis to suck blood from
our body. Therefore will not mosquitoes spread AIDS
just as they spread malaria?                                    149
How does regular physical exercise improve our muscles?         150
Why does nose get blocked while crying?                         152
How do pain balms work?                                         153
What is pain? How is it measured?                               154
Why does one perspire after hard work?                          155
How does scratching stop itching?                               156
Why do we sweat when tense or when overcome by fear?            157
What is a keloid and how do you get one?                        158
What causes pimples in teenagers?                               159
Why does it itch when a wound starts healing?                   160
Why do wounds caused by rusting metal sheets
become septic?                                                  160
When applying tincture or dettol on wounds why
does one experience a burning sensation?                        161
What is colour blindness? How is it caused?                     162
Why do we dream?                                                162
Why do people walk in sleep?                                    163
Why should we not sleep north-south?                            165
Why do we feel sleepy after heavy meals?                        166
Why do some people gnash their teeth during sleep?              167
Why do we sneeze?                                               167
Why don’t we sneeze when we sleep?                              167
Do any animals besides people snore?                            168
Why do we snore?                                                168
Why do wisdom teeth emerge later than other teeth?              170
Why does the body temperature rise when we get angry?           170
Why does our temperature go up when we are ill?                 171
How does the body normally maintain the temperature at
98 degree Fahrenheit?                                           173
Why does urine become yellow in colour when we take
certain medicines or tonics?                                    174
Doctors advise us to eat leafy vegetables and tomatoes
which contain vitamins and essential nutrients.
Accordingly we cook and eat them. My doubt is will not
these nutrients be destroyed when we cook them?
If so, how else should we eat them?                             175
Why does Vitamin B alone occur in a variety?                    176
What induces vomiting while swinging?                           177
What induces vomiting while travelling or seeing
from a height?                                                  177
Why is yawn contagious?                                         178
How do bacteria develop resistance?                             178
What is cloning?                                                179
Why does voice differ from person to person?                    180
How is it that blind men have better listening and
feeling capabilities? Is it true that if there is a
handicap, other faculties work better?                          181