NEET Foundation Physics Chapter 4 Why Do We Fall Ill Multiple Choice Questions

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Chapter 4 Why Do We Fall Ill Multiple Choice Question And Answers

Direction: Choose the correct option for each questions. There is only one correct response for each question.

Question 1. Cells are the basic units of

  1. human beings
  2. living beings
  3. proteins
  4. well-being

Answer. 2. living beings

Question 2. Cells are made of a variety of which of the following chemical substances?

  1. Proteins
  2. Carbohydrates
  3. Fats or lipids
  4. All the above

Answer. 4. All the above

Question 3. The heart is beating, the lungs are ­breathing, the kidney is filtering urine, the brain is

  1. responding
  2. reacting
  3. thinking
  4. elaborating

Answer. 3. thinking

Question 4. If the kidneys are not filtering urine, poisonous substances will

  1. accumulate
  2. disperse
  3. dissipate
  4. scatter

Answer. 1. accumulate

Question 5. Which of the following is a necessity for cell and tissue functions?

  1. Proteins
  2. Carbohydrates
  3. Fats or lipids
  4. Food

Answer. 4. Food

Read and Learn More NEET Foundation Multiple Choice Questions

Question 6. Good economic conditions and jobs are needed for an individual to maintain

  1. health
  2. wealth
  3. standard of living
  4. reputation

Answer. 1. health

Question 7. A state of physical, mental and social well being is called

  1. wealth
  2. standard of living
  3. reputation
  4. health

Answer. 4. health

Question 8. Which of the following helps to digest the food taken in?

  1. Digestive system
  2. Intestine
  3. Stomach
  4. Kidney

Answer. 1. Digestive system

Question 9. Which of the following is made up of bones and muscles?

  1. Musculoskeletal system
  2. Digestive system
  3. Intestine
  4. Stomach

Answer. 1. Musculoskeletal system

Question 10. Which of the following holds the body parts together and helps the body move?

  1. Digestive system
  2. Intestine
  3. Musculoskeletal system
  4. Stomach

Answer. 3. Musculoskeletal system

Question 11. Signs of disease are what physicians will look for on the basis of

  1. symptoms
  2. causes
  3. digestive system
  4. outside the body

Answer. 1. symptoms

Question 12. Some diseases last for only very short period of time and these are called

  1. chronic diseases
  2. acute diseases
  3. elephantiasis
  4. infectious diseases

Answer. 2. acute diseases

Question 13. Other ailments can last for a long time, even as much as a lifetime and they are called

  1. chronic diseases
  2. acute diseases
  3. elephantiasis
  4. infectious diseases

Answer. 1. chronic diseases

Question 14. An example is the infection causing elephantiasis, which is very common in some parts of

  1. West Indies
  2. Sri Lanka
  3. India
  4. Africa

Answer. 3. India

Question 15. Diseases where microbes are the immediate causes are called

  1. chronic diseases
  2. acute diseases
  3. elephantiasis
  4. infectious diseases

Answer. 4. infectious diseases

Question 16. Some cancers are caused by which of the following?

  1. Liver abnormalities
  2. Lungs abnormalities
  3. Heart abnormalities
  4. Genetic abnormalities

Answer. 1. Liver abnormalities

Question 17. High blood pressure can be caused by excessive weight and

  1. lack of exercise
  2. genetic abnormalities
  3. excessive salt
  4. excessive sodium

Answer. 1. lack of exercise

Question 18. Chronic diseases therefore, have very drastic long-term effects on people’s health as compared to

  1. chronic diseases
  2. acute diseases
  3. elephantiasis
  4. infectious diseases

Answer. 2. acute diseases

Question 19. Marshall and Warren received the Nobel prize for physiology and medicine in

  1. 2001
  2. 2005
  3. 2004
  4. 2003

Answer. 2. 2005

Question 20. Some common examples of diseases caused by viruses are common cold, influenza, dengue fever and

  1. AIDS
  2. typhoid
  3. tuberculosis
  4. anthrax

Answer. 1. AIDS

Question 21. Diseases like typhoid fever, cholera, tuberculosis and anthrax are caused by

  1. Worm
  2. fungi
  3. bacteria
  4. virus

Answer. 3. bacteria

Question 22. Many common skin infections are caused by different kinds of

  1. bacteria
  2. virus
  3. worms
  4. fungi

Answer. 4. fungi

Question 23. Protozoan microbes cause many familiar diseases, such as malaria and

  1. kala-azar
  2. penicillin
  3. typhoid
  4. malaria

Answer. 1. kala-azar

Question 24. Each and everyone of us have also come across intestinal worm infections, as well as diseases like elephantiasis caused by different species of

  1. bacteria
  2. virus
  3. worms
  4. fungi

Answer. 3. worms

Question 25. The antibiotic penicillin blocks the bacterial processes that build

  1. cell wall
  2. vectors
  3. lymph nodes
  4. cowpox

Answer. 1. cell wall

Question 26. Many microbial agents that can commonly move from an affected person to someone else in a variety of ways are also called

  1. commuting diseases
  2. incommunicable diseases
  3. communicable diseases
  4. communic diseases

Answer. 3. communicable diseases

Question 27. It includes handshakes or hugs or sports, like wrestling, or by any of the other ways in which we touch each other socially, it is called

  1. casual physical contact
  2. formal physical contact
  3. forced physical contact
  4. potential physical contact

Answer. 1. casual physical contact

Question 28. Other than sexual contact, the AIDS virus can also spread through blood-to-blood contact with infected people orfrom an infected mother to her baby during pregnancy or through

  1. hugs
  2. saliva
  3. touches
  4. breast feeding

Answer. 4. breast feeding

Question 29. These animals carry the infecting agents from a sick person to another potential host. These animals are thus the intermediaries and they are called

  1. vectors
  2. nectors
  3. cell wall
  4. lymph

Answer. 1. vectors

Question 30. Which of the following infection comes into the body through sexual organs and spreads to lymph nodes all over the body?

  1. AIDS
  2. Typhoid
  3. Tuberculosis
  4. Anthrax

Answer. 1. AIDS

Question 31. Health is a state of

(1) physical

(2) mental

(3) social well-being

(4) economic

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1), (2) and (4)

Answer. 1. (1), (2) and (3)

Question 32. Diseases are classified depending on their duration.

(1) Acute

(2) Chronic

(3) Mental

(4) Physical

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 4. (1), (2), (3) and (4)

Question 33. Disease may be due to causes like

(1) microscopic

(2) non-infectious

(3) multicellular

(4) infectious

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (2) and (4)
  4. (1), (3) and (4)

Answer. 3. (2) and (4)

Question 34. Infectious agents belong to different ­categories of organisms and may be

(1) unicellular

(2) single cellular

(3) microscopic

(4) multicellular

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 3. (1), (3) and (4)

Question 35. Infectious agents are spread through

(1) air

(2) water

(3) physical contact

(4) vectors

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 2. (1), (2), (3) and (4)

Question 36. Effective prevention of infectious diseases in the community requires that everyone should have access to

(1) air

(2) water

(3) public hygiene

(4) immunization

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (3) and (4)

Answer. 4. (3) and (4)

Question 37. Cells are made of a variety of chemical substances, such as

(1) proteins

(2) carbohydrates

(3) fats

(4) lipids

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (3) and (4)

Answer. 2. (1), (2), (3) and (4)

Question 38. In our organs or tissues, various specialized activities are carried out, such as

(1) heart is beating.

(2) lungs are breathing.

(3) kidney is filtering urine.

(4) brain is thinking.

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (3) and (4)

Answer. 2. (1), (2), (3) and (4)

Question 39. Health means a state of

(1) physical

(2) mental

(3) social well-being

(4) living standard

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (3) and (4)

Answer. 1. (1), (2) and (3)

Question 40. The digestive system helps to digest food taken in from outside the body.

(1) Stomach

(2) Intestines

(3) Kidney

(4) Liver

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 4. (1) and (2)

Question 41. The musculoskeletal system holds the body parts together and it helps the body move, it is made up of

(1) liver

(2) bones

(3) muscles

(4) immune system

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (2) and (3)

Answer. 4. (2) and (3)

Question 42. High blood pressure can be caused by

(1) excessive weight

(2) lack of exercise

(3) musculoskeletal

(4) inflammation

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 4. (1) and (2)

Question 43. Diseases are found in a wide range of such categories of classification, such as

(1) viruses

(2) bacteria

(3) fungi

(4) worms

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 2. (1), (2), (3) and (4)

Question 44. The common examples of diseases caused by viruses are

(1) common cold

(2) influenza

(3) dengue fever

(4) AIDS

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 2. (1), (2), (3) and (4)

Question 45. The diseases caused by bacteria are

(1) typhoid fever

(2) cholera

(3) tuberculosis

(4) anthrax

  1. (1), (2) and (3)
  2. (1), (2), (3) and (4)
  3. (1), (3) and (4)
  4. (1) and (2)

Answer. 2. (1), (2), (3) and (4)

Question 46. Which is a chronic disease?

  1. Tuberculosis
  2. Night blindness
  3. Cholera
  4. Rickets

Answer. 3. Cholera

Question 47. Which one is not a sexually transmitted disease?

  1. AIDS
  2. Gonorrhoea
  3. Syphilis
  4. Diabetes

Answer. 4. Diabetes

Question 48. Which one is not a bacterial disease?

  1. TB
  2. Typhoid
  3. Pneumonia
  4. Poliomyelitis

Answer. 4. Poliomyelitis

Question 49. AIDS can be transmitted through

  1. Blood transfusion
  2. Pregnant mother to foetus
  3. Sexual contact
  4. All the above

Answer. 4. All the above

Question 50. Which one of the following is a deficiency disease?

  1. Diabetes
  2. Malaria
  3. Goitre
  4. Tetanus

Answer. 3. Goitre

Question 51. Which is not an infectious disease?

  1. Diabetes
  2. TB
  3. Leprosy
  4. Typhoid

Answer. 1. Diabetes

Question 52. Which disease is caused due to deficiency of a hormone?

  1. Chickenpox
  2. Diabetes
  3. AIDS
  4. Malaria

Answer. 2. Diabetes

Question 53. Common cold is a/an

  1. genetic disorder
  2. acute disease
  3. chronic disease
  4. deficiency disease

Answer. 2. acute disease

Question 54. Choose the wrong statement.

  1. High blood pressure is caused by excessive weight and lack of exercise
  2. Cancers can be caused by genetic abnormalities
  3. Peptic ulcers are caused by eating acidic food
  4. Acne is not caused by staphylococcl

Answer. 4. Acne is not caused by staphylococcl

Question 55. We should not allow mosquitoes to breed in our surroundings because they

  1. multiply very fast and cause pollution
  2. are vectors for many disease
  3. bite and cause skin disease
  4. are not important insects

Answer. 2. are vectors for many disease

Question 56. Which one of the following causes kala-azar?

  1. Ascaris
  2. Trypanosoma
  3. Leishmania
  4. Bacteria

Answer. 3. Leishmania

Question 57. Which disease is not transmitted by mosquitoes?

  1. Dengue
  2. Malaria
  3. Brain fever or encephalitis
  4. Pneumonia

Answer. 4. Pneumonia

Question 58. Which one of the following is not important for individual health?

  1. Living in clean space
  2. Good economic condition
  3. Social equality and harmony
  4. Living in a large and well furnished house

Answer. 4. Living in a large and well furnished house

Question 59. Which one of the following is not a viral disease?

  1. Dengue
  2. AIDS
  3. Typhoid
  4. Influenza

Answer. 3. Typhoid

Question 60. Which one of the following is not a ­bacterial disease?

  1. Cholera
  2. Tuberculosis
  3. Anthrax
  4. Influenza

Answer. 4. Influenza

Question 61. The technique of providing immunity by vaccination was first developed by

  1. Robert koch
  2. Alexender fleming
  3. William harvey
  4. Edward Jenner

Answer. 4. Edward Jenner

Question 62. ‘Penicillin’ a life saving antibiotic, was discovered by

  1. Alexander Fleming
  2. Edward Jenner
  3. H.G. Khorana
  4. William Harvey

Answer. 1. Alexander Fleming

Question 63. For which disease ‘oral’ vaccine is given?

  1. TB
  2. Typhoid
  3. Pertusis
  4. Poliomyelitis

Answer. 2. Typhoid

Question 64. ‘BCG’ vaccine is given to infants for ­protection against

  1. Diarrhoea
  2. Cholera
  3. Pneumonia
  4. Tuberculosis

Answer. 4. Tuberculosis

Question 65. You are aware of Polio Eradication Programme in your city. Children are ­vaccinated because

  1. vaccination kills the polio causing microorganisms
  2. prevents the entry of polio causing organism
  3. It creats immunity in the body
  4. All the above

Answer. 3. It creats immunity in the body

Question 66. The chemicals that kill or stop the growth of certain kinds of microbes are called

  1. vaccines
  2. microbes
  3. antibiotics
  4. fungi

Answer. 3. antibiotics

Question 67. Penicillium is a/an

  1. antibiotic
  2. vaccine
  3. alga
  4. fungus

Answer. 4. fungus

Question 68. The diseases that can be transmitted through body fluids are

  1. AIDS and hepatitis B
  2. TB and typhoid
  3. influenza and cholera
  4. cholera and rabies

Answer. 1. AIDS and hepatitis B

Question 69. ‘Congential diseases’ are those which:

  1. are these since birth
  2. are inherited
  3. are transmitted easily
  4. are fatal

Answer. 2. are inherited

Question 70. Widal test helps to diagnose

  1. Tetanus
  2. Tuberculosis
  3. Typhoid
  4. Whooping cough

Answer. 3. Typhoid

Question 71. DPT Vaccine is for

  1. Diptheria, Polio, Tetanus
  2. Diptheria, Pertussis, Tetanus
  3. Diptheria, Pertussis, Typhoid
  4. Diptheria, Pertussis, Tuberculosis

Answer. 2. Diptheria, Pertussis, Tetanus

Question 72. World TB day is celebrated on

  1. March 21
  2. March 24
  3. March 30
  4. March 18

Answer. 2. March 24

Question 73. Polio is caused due to

  1. bacteria
  2. virus
  3. fungi
  4. helminthes worm

Answer. 2. virus

Question 74. The Pulse Polio Programme is organized in our country for

  1. eradicating polio
  2. spreading polio
  3. curing polio
  4. none of these

Answer. 1. eradicating polio

Question 75. AIDS day is celebrated on

  1. 5th June
  2. 1st October
  3. 11th July
  4. 1st December

Answer. 4. 1st December

Question 76. ______ depicts the notion of being well.

  1. Health
  2. Disease-free
  3. Infectious body
  4. Healthy agent

Answer. 1. Health

Question 77. ______ refers to the state of absence of comfort to perform daily activities. It depends on the individual only.

  1. Disease-free person
  2. Health-free body
  3. Non-healthy body
  4. Healthy body

Answer. 1. Disease-free person

Question 78. ______ is defined as an abnormal condition that disturbs or modifies the performance of vital functions of the body.

  1. Disease
  2. Health
  3. Infection
  4. Infectious agent

Answer. 1. Disease

Question 79. The vital intrinsic factors responsible for ill health of humans are ______.

  1. genetic disorders
  2. environmental hazards
  3. pathogenic agents
  4. protein malfunctioning

Answer. 1. genetic disorders

Question 80. ______ are the disease causing external agents, which enter our body from outside environment.

  1. Extrinsic factors
  2. Internal factors
  3. External factors
  4. Genetic factors

Answer. 1. Extrinsic factors

Question 81. Which disease is caused by virus?

  1. AIDS
  2. TB
  3. Scabies
  4. Dengue fever

Answer. 1. AIDS

Question 82. Whooping cough is caused due to which of the following disease?

  1. Bacillus anthracis
  2. Bordetella pertussis
  3. Salmonella typhi
  4. Clostridium tetani

Answer. 2. Bordetella pertussis

Question 83. Plasmodium causes which of the following disease?

  1. Kala-azar
  2. Dengue fever
  3. Sleeping sickness
  4. Pyorrhea

Answer. 2. Dengue fever

Question 84. Which of the following is an airborne disease?

  1. Influenza
  2. Typhoid
  3. AIDS
  4. Gonorrhoea

Answer. 1. Influenza

Question 85. Which of the following disease is transmitted due to louse?

  1. Malaria
  2. Filariasis
  3. Epidemic typhus
  4. Typhoid

Answer. 3. Epidemic typhus

Question 86. ______ are the examples of sexually-transmitted diseases.

  1. AIDS
  2. Cholera
  3. Typhoid
  4. Malaria

Answer. 1. AIDS

Question 87. ______ are the prominent examples of airborne diseases.

  1. Tuberculosis
  2. Malaria
  3. Gonorrhoea
  4. Syphilis

Answer. 1. Tuberculosis

Question 88. Elephantiasis is a ______.

  1. worm infection
  2. protozoan disease
  3. airborne disease
  4. waterborne disease

Answer. 1. worm infection

Question 89. Anthrax is caused by ______.

  1. bacteria
  2. virus
  3. fungi
  4. protozoan

Answer. 1. bacteria

Question 90. Which of the following is the causative agent of typhoid?

  1. Treponema pallidum
  2. Salmonella typhi
  3. Vibrio cholerae
  4. Bacillus anthracis

Answer. 2. Salmonella typhi

Question 91. Which of the following is the first cell to reach the site of infection?

  1. Microphages
  2. Neutrophil
  3. RBC
  4. Neuron

Answer. 2. Neutrophil

Question 92. If a person encounters ______ once in life, he develops immunity against it for life time.
Answer. Small pox

Question 93. In which disease the virus enters the respiratory tract and affects epithelial lining of mucus membrane?

  1. Influenza
  2. Rabies
  3. Jaundice
  4. Hepatitis

Answer. 1. Influenza

Question 94. Headache, nausea followed by hydrophobia develops in ______.
Answer. Rabies

Question 95. In ______ disease, the virus enters the CNS and destroys motor nerve leading to paralysis mainly in legs.
Answer. Polio

Question 96. Which of the following disease affects our lungs?

  1. AIDS
  2. Rabies
  3. Polio
  4. Tuberculosis

Answer. 4. Tuberculosis

Question 97. The BCG vaccine is given for the immunity against which disease?

  1. Hepatitis
  2. Jaundice
  3. Tuberculosis
  4. Malaria

Answer. 3. Tuberculosis

Question 98. Malaria is caused due to which of the following?

  1. Protozoa
  2. Anopheles mosquito
  3. Both a and b
  4. None of these

Answer. 4. None of these

Question 99. Plasmodium is an example of which of the following?

  1. Virus
  2. Bacteria
  3. Protozoa
  4. Worm

Answer. 3. Protozoa

Question 100. Diarrhea, cholera, typhoid are the diseases that have one thing in common that is

  1. all of them are caused by bacteria.
  2. all of them is transmitted by contaminated food and water.
  3. all of them are cured by antibiotics.
  4. all the above

Answer. 4. all the above

Question 101. HIV virus attacks which one of the following cells in our body?

  1. Red blood cells
  2. White blood cells
  3. Liver cell
  4. Long cell

Answer. 4. Long cell

Question 102. Penicillin is a drug that involves which of the following?

  1. Interfere in the biological pathway of bacteria.
  2. An antibiotic that can kill bacteria.
  3. Both (a) and (b)
  4. None of the above

Answer. 4. None of the above

Question 103. Which of the following disease is caused due to worm?

  1. Tetanus
  2. Rabies
  3. Sleeping sickness
  4. Filariasis

Answer. 4. Filariasis

Question 104. Which of the following is a bacteria?

  1. Plasmodium
  2. Trypanosome
  3. Rabies virus
  4. Salmonella typhi

Answer. 2. Trypanosome

Question 105. Which one of the following is not a viral disease?

  1. Dengue
  2. AIDS
  3. Typhoid
  4. Influenza

Answer. 3. Typhoid

Question 106. Which one of the following is not a bacterial disease?

  1. Cholera
  2. Tuberculosis
  3. Anthrax
  4. Influenza

Answer. 4. Influenza

Question 107. Which one of the following disease is not transmitted by mosquito?

  1. Brain fever
  2. Malaria
  3. Typhoid
  4. Dengue

Answer. 3. Typhoid

Question 108. Which one of the following disease is caused by bacteria?

  1. Typhoid
  2. Anthrax
  3. Tuberculosis
  4. Malaria

Answer. 4. Malaria

Question 109. Which one of the following diseases is caused by protozoans?

  1. Malaria
  2. Influenza
  3. AIDS
  4. Cholera

Answer. 1. Malaria

Question 110. Which one of the following has a long term effect on the health of an individual?

  1. Common cold
  2. Chicken pox
  3. Chewing tobacco
  4. Stress

Answer. 3. Chewing tobacco

Question 111. Which of the following can make you ill if you come in contact with an infected person?

  1. High blood pressure
  2. Genetic abnormalities
  3. Sneezing
  4. Blood cancer

Answer. 3. Sneezing

Question 112. AIDS cannot be transmitted by

  1. sexual contact
  2. hugs
  3. breast feeding
  4. blood transfusion

Answer. 2. hugs

Question 113. Making anti-viral drugs is more difficult than making anti-bacterial medicines because

  1. viruses make use of host machinery.
  2. viruses are on the border line of living and non-living.
  3. viruses have very few biochemical mechanisms of their own.
  4. viruses have a protein coat.

Answer. 3. viruses have very few biochemical mechanisms of their own.

Question 114. Which one of the following causes kala-azar?

  1. Ascaris
  2. Trypanosoma
  3. Leishmania
  4. Bacteria

Answer. 3. Leishmania

Question 115. If you live in a overcrowded and poorly ventilated house, it is possible that you may suffer from which of the following diseases?

  1. Cancer
  2. AIDS
  3. Airborne diseases
  4. Cholera

Answer. 3. Airborne diseases

Question 116. Which of the following disease is not transmitted by mosquitoes?

  1. Dengue
  2. Malaria
  3. Brain fever or encephalitis
  4. Pneumonia

Answer. 4. Pneumonia

Question 117. Which one of the following is not important for an individual’s health?

  1. Living in clean space.
  2. Good economic condition.
  3. Social equality and harmony.
  4. Living in a large and well-furnished house.

Answer. 4. Living in a large and well-furnished house.

Question 118. Choose the incorrect statement from the following.

  1. High blood pressure is caused by excessive weight and lack of exercise.
  2. Cancers can be caused by genetic abnormalities.
  3. Peptic ulcers are caused by eating acidic food.
  4. Acne in not caused by staphylococci.

Answer. 3. Peptic ulcers are caused by eating acidic food.

Question 119. We should not allow mosquitoes to breed in our surroundings because they

  1. multiply very fast and cause pollution.
  2. are vectors for many diseases.
  3. bite and cause skin diseases.
  4. are not important insects.

Answer. 2. are vectors for many diseases.

Question 119. You are aware of the ‘Polio Eradication Programme’ in your city. Children are vaccinated because

  1. vaccination kills the polio causing microorganisms.
  2. prevents the entry of polio causing organism.
  3. it creates immunity in the body.
  4. all the above

Answer. 3. it creates immunity in the body.

Question 120. Viruses, which cause hepatitis, are transmitted through

  1. air
  2. water
  3. food
  4. personal contact

Answer. 2. water

Question 121. Vectors can be defined as

  1. animals carry the infecting agents from sick person to another healthy person.
  2. microorganisms which cause many diseases.
  3. infected person.
  4. diseased plants.

Answer. 1. animals carry the infecting agents from sick person to another healthy person.

Question 122. State any two conditions essential for health.
Answer: The two conditions essential for good health are as follows.

  • State of physical, mental and social well-being.
  • Better surroundings or environment.

Question 123. State any two conditions essential for being free of disease.
Answer: The two conditions essential for being free of disease are as follows.

  • Personal and domestic hygiene.
  • Clean environment and surroundings.

Question 124. Define the term ’health’. Discuss the conditions essential to maintain good health.
Answer: Health can be defined as the state of complete physical, social and mental well-being.

  • Availability of clean drinking water.
  • Availability of sufficient and nutritious food.
  • Social equality.
  • Proper sanitation.

Question 125. What are intrinsic and extrinsic factors?
Answer: The disease-causing factors that are the components of our body are termed as intrinsic factors. The disease causing external agents, which enter our body from outside are called extrinsic factors.

Question 126. What do you understand by the term disease?
Answer: Disease is defined as an abnormal condition that disturbs or modifies the performance of vital functions of the body.

Question 127. Disease is defined as a ______ that disturbs or modifies the performance of vital functions of the body.
Answer. Abnormal condition

Question 128. What are the diseases caused by internal ­factors of the body?

  1. Organic
  2. Inorganic
  3. Chronic
  4. Acute

Answer. 1. Organic

Question 129. Which disease takes place in children with hyposecretion of thyroid?

  1. Myxoedema
  2. Cretinism
  3. Exophthalmia goitre
  4. Tetany

Answer. 2. Cretinism

Question 130. Find the odd one out from the following.

  1. Scurvy
  2. Beriberi
  3. Anaemia
  4. Haemophilia

Answer. 4. Haemophilia

Question 131. Which disease occurs due to the ­deficiency of protein?

  1. Goitre
  2. Bleeding disease
  3. Marasmus
  4. Beriberi

Answer. 3. Marasmus

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