Health and Hygiene Quiz - ICSE Class 8 Science

Free practice quiz: Health and Hygiene (ICSE Class 8 Science). 50 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 8 Science practice quiz has 50 multiple-choice questions on Health and Hygiene, and 50 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is the primary function of antibodies in the human immune system?

   1. To transport oxygen to tissues
   2. To neutralize or eliminate pathogens
   3. To produce energy for cellular processes
   4. To regulate blood sugar levels
   Show answer

   Answer: B. To neutralize or eliminate pathogens

   Antibodies are Y-shaped proteins produced by B cells (a type of white blood cell) that are specific to particular antigens found on pathogens. They bind to these pathogens, marking them for destruction by other immune cells or directly neutralizing their harmful effects.

2. Which of the following is a non-communicable disease that is often linked to lifestyle factors such as poor diet and lack of exercise?

   1. Tuberculosis
   2. Malaria
   3. Diabetes Mellitus Type 2
   4. Influenza
   Show answer

   Answer: C. Diabetes Mellitus Type 2

   Type 2 Diabetes Mellitus is a chronic condition where the body doesn't use insulin properly. While genetics play a role, lifestyle factors like obesity, sedentary behavior, and an unhealthy diet significantly contribute to its development.

3. The symptoms of conjunctivitis ('pink eye') often include redness, itching, and discharge from the eyes. This condition is most commonly caused by:

   1. Bacterial or viral infections
   2. Allergic reactions
   3. Exposure to irritants like smoke
   4. All of the above
   Show answer

   Answer: D. All of the above

   Conjunctivitis is inflammation of the conjunctiva, the thin membrane that lines the eyelid and covers the white part of the eye. It can be caused by various factors, including bacteria, viruses, allergies, and irritants.

4. What is the primary function of the alveoli in the lungs?

   1. To filter air and trap dust
   2. To produce mucus to lubricate airways
   3. To facilitate the exchange of oxygen and carbon dioxide
   4. To regulate the temperature of inhaled air
   Show answer

   Answer: C. To facilitate the exchange of oxygen and carbon dioxide

   Alveoli are tiny, thin-walled sacs in the lungs where gas exchange occurs. Oxygen from the inhaled air passes through the alveoli into the bloodstream, while carbon dioxide from the blood passes into the alveoli to be exhaled.

5. Which type of vaccine uses a weakened, live version of a virus or bacterium to stimulate an immune response?

   1. Inactivated vaccine
   2. Toxoid vaccine
   3. Subunit vaccine
   4. Live-attenuated vaccine
   Show answer

   Answer: D. Live-attenuated vaccine

   Live-attenuated vaccines contain a weakened form of the pathogen that can still replicate but does not cause serious illness in people with healthy immune systems. Examples include the MMR (measles, mumps, rubella) vaccine and the chickenpox vaccine.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Persistent coughing, especially at night, accompanied by shortness of breath and wheezing, could be indicative of which respiratory condition?
2. The process of phagocytosis is a crucial mechanism for which type of immune cell?
3. Which of the following is NOT a common mode of transmission for Hepatitis A?
4. The role of vaccines in preventing infectious diseases is to:
5. An individual experiencing persistent, unexplained fatigue, weight loss, and swollen lymph nodes, particularly in the neck and armpits, should consult a doctor to rule out which potential condition?
6. Which of the following dietary components is essential for the proper functioning of the thyroid gland and the production of thyroid hormones?
7. The 'R.I.C.E.' mnemonic, often recommended for soft tissue injuries, stands for Rest, Ice, Compression, and which other element?
8. Which type of bacteria are beneficial and play a vital role in human digestion by synthesizing certain vitamins in the gut?
9. A deficiency in Vitamin D can lead to which skeletal disorder, characterized by soft and weakened bones?
10. The process by which the body maintains a stable internal environment, despite changes in external conditions, is called:
11. When a person has a fever, their body temperature is elevated. Which part of the brain plays a crucial role in regulating body temperature?
12. Which of the following is a primary defense mechanism of the body against pathogens entering through the skin?
13. Food poisoning caused by Salmonella bacteria is typically contracted through:
14. The process of cellular respiration, which releases energy from food molecules, primarily occurs in which organelle?
15. Which of the following is a crucial function of white blood cells (leukocytes) in maintaining health?
16. When exercising, the body needs to increase its oxygen intake. Which system is primarily responsible for this transport of oxygen from the lungs to the body's cells?
17. The ability of the body to resist infection by disease-causing microorganisms is known as:
18. A person with a severe deficiency in Vitamin C is at risk of developing which condition, characterized by bleeding gums, fatigue, and poor wound healing?
19. Which of the following is a correct practice for maintaining oral hygiene?
20. The human body's natural defense mechanism against foreign particles entering the respiratory tract includes:
21. Which type of physical activity is most effective in strengthening the cardiovascular system and improving lung capacity?
22. The 'window period' in the context of infectious diseases refers to:
23. A balanced diet should include adequate amounts of carbohydrates, proteins, fats, vitamins, minerals, and water. Which of these macronutrients is primarily responsible for providing energy?
24. Which chronic respiratory condition is characterized by the gradual destruction of the alveoli, leading to reduced lung function and difficulty breathing?
25. The process of inflammation, while sometimes uncomfortable, is a vital part of the body's defense. What is the primary role of inflammation?
26. Which of the following practices is most effective in preventing the spread of the common cold and flu?
27. The human skeleton provides support, protects organs, and allows for movement. Which mineral is most crucial for the strength and density of bones?
28. The body's circadian rhythm, which regulates sleep-wake cycles, is primarily influenced by:
29. Which of the following is a vector-borne disease, meaning it is transmitted by an insect or other arthropod?
30. A person with a compromised immune system is more susceptible to infections. Which of the following is NOT a factor that would typically weaken the immune system?
31. Which of the following is an example of active immunity?
32. The primary role of the digestive system is to:
33. Which of these is a key characteristic of a zoonotic disease?
34. The feeling of thirst is a signal from the body indicating a need for:
35. Which of the following is a common symptom of iron-deficiency anemia?
36. The human nervous system is comprised of the central nervous system and the peripheral nervous system. Which part is responsible for processing information and making decisions?
37. When exercising vigorously, the body produces lactic acid as a byproduct of anaerobic respiration. What is the role of lactic acid in this process?
38. Which of the following is the most appropriate first-aid step for a minor burn on the skin?
39. The body's internal clock, responsible for regulating sleep-wake cycles, is known as the:
40. Which of the following is NOT a symptom of dehydration?
41. The immune system's ability to distinguish between 'self' (body's own cells) and 'non-self' (foreign invaders) is crucial. What kind of molecules are primarily involved in this recognition process?
42. Which of the following diseases is characterized by the decay of tooth enamel due to the action of acids produced by bacteria metabolizing sugars?
43. The body's primary defense against airborne pathogens entering the nose and mouth involves:
44. A person with a chronic obstructive pulmonary disease (COPD) often experiences:
45. Which of the following is a good source of dietary fiber, important for digestive health?

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