Free Why Do We Fall Ill? 03 Practice Test - 9th Grade
Question 1
Elephantiasis is an example of an acute disease.
True
False
SOLUTION
Solution : B
An acute disease is a disease that follows a short course. Elephantiasis refers to a parasitic infection that causes extreme swelling in the arms and legs. The disease is caused by the filarial worm, which is transmitted via the female culex mosquito. Ailments that last for a long time, even as much as a lifetime, are called chronic diseases. Elephantiasis can last for a very long time and has long-term effects on the body. Therefore, it is a chronic disease.
Question 2
Choose the correct statement from the following.
Antibiotics can kill bacteria and virus that cause an infection.
Many antibiotics are produced by bacteria.
Antibiotics enhance immunity and strengthen pathogen-fighting ability.
Antibiotics have no side effects.
SOLUTION
Solution : B
Antibiotics are substances produced by some bacteria or fungi, or can even be produced synthetically. Antibiotics works against the pathogenic bacteria. Anitibiotics disrupt the cell wall formation in them and thus, kill the bateria and stop their multiplication.
Antibiotics work only against bacteria and simply attack them. They are not responsible for the strengthening of immune system. They have multiple side effects like diarrhea, nausea, vomiting, rash, stomach upset etc.
Question 3
What are the most common means by which diseases such as common cold and influenza spread?
Breathing in germs in the air
Hand-to-face contact
Stress
SOLUTION
Solution : A and B
The most common way to catch infectious illnesses like cold and influenza is through droplet infection through air. Touching the mouth, nose, or eyes with hands that are contaminated with disease-causing germs is another common way to get infected by these diseases.
Question 4
The specific cells that specialise in killing infecting microbes are known as ___.
SOLUTION
Solution : A
The immune system of our body is specialised in killing the infecting organisms with the help of immune cells. These cells go into action each time when infecting microbes enter the body.
Question 5
Penicillin does not have any affect on human cells. Why?
SOLUTION
Solution : A
The antibiotic penicillin blocks the bacterial processes that build the cell wall. Due to the lack of cell wall, the organism dies easily. Human cells don’t have a cell-wall. So penicillin cannot have such an effect on human cells.
Question 6
Infectious diseases can be prevented by using immunisation.
SOLUTION
Solution : A
Effective prevention of infectious diseases in the community is achieved through access to public hygiene and immunisation.
A community with the availability of the better hospitals and resources like vaccines to improve immunity, medicines, clean environment etc. eliminates the disease first hand and contributes to the eradication of the infectious diseases effectively and permanently.
Question 7
What is the main reason that prevents some people from getting a particular disease whereas others are easily affected?
SOLUTION
Solution : A
The ability of an organism to resist disease, either through the activities of specialized blood cells or antibodies produced by them is termed as immunity.Some people are more immune against certain diseases than other people. Thus, immunity is responsible for giving protection against certain diseases to some people.
Question 8
Principles of treatment of a disease is only based on killing the cause of the disease.
SOLUTION
Solution : B
There are the following two ways to treat a disease.
1. Kill the cause of the disease: Each microbe undergoes some specific biochemical life process which helps them to survive. The intake of certain drugs that block these biochemical processes can help in killing the microorganism causing the disease. Antibiotics serve the purpose.
2. Reduce the effect of the disease: Medicines are provided to reduce the pain or bring down the fever. In other words, symptomatical treatment may help to reduce the impact of a disease, but it might not outright cure it. Illness like the common cold does not have a cure, hence, treating symptoms symptomatically will alleviate the discomfort or illness to an extent.
Question 9
Choose the communicable diseases from the following.
SOLUTION
Solution : A, C, and D
Diseases that spread from one person to another are called communicable diseases. They are usually caused by pathogens. They can be transmitted by physical contact with an infected person or through vectors or other agents. E.g. Malaria, AIDS, chickenpox, etc. Cancer, on the other hand, is a non-communicable disease.
Question 10
_________is a lung disease that makes us ill for a long period, resulting in weight loss and continuous tiredness.
SOLUTION
Solution : B
∙ A chronic condition is a human health condition that is persistent or otherwise long-lasting in it's effects. Tuberculosis is one such chronic disease. Other chronic diseases include cancer, diabetes, etc.
∙ Acute diseases occur suddenly and last only for a few days. E.g., Common cold, heart attack, etc.
∙ Congenital diseases, also called birth defects, can be acquired during the development of embryo or from genetic makeup of parents. E.g. Heart defects, down's syndrome, etc.
∙ Dietary diseases are caused due to deficiency or excesses of nutrients in the diet. E.g. Obesity, malnutrition, cardiovascular disorders, etc.