50 Health & Lifestyle Quiz Questions & Answers

Below are 50 health & lifestyle quiz questions with the correct answer and a short explanation for each. Use them to revise, host a quiz night, or prepare for competitions — then challenge yourself with the timed, interactive version on QuizOxa.

Health & Lifestyle Quiz Questions and Answers

Q1. How many bones are in an adult human body?

✅ Answer: 206

💡 An adult human body has 206 bones. Babies are born with around 270 bones, which fuse together as they grow.

Q2. What is the largest organ in the human body?

✅ Answer: Skin

💡 The skin is the largest organ, covering about 22 square feet in adults and weighing around 8 pounds.

Q3. How many chambers does the human heart have?

✅ Answer: 4

💡 The heart has 4 chambers: two upper atria and two lower ventricles.

Q4. What is the recommended daily water intake for adults?

✅ Answer: 2-3 liters

💡 Health authorities recommend 2-3 liters (8-10 glasses) of water daily for adults.

Q5. Which vitamin is produced when skin is exposed to sunlight?

✅ Answer: Vitamin D

💡 Vitamin D is synthesized in the skin when exposed to UVB rays from sunlight.

Q6. What is the normal human body temperature?

✅ Answer: 37°C

💡 The normal human body temperature is approximately 37°C (98.6°F).

Q7. Which blood type is known as the universal donor?

✅ Answer: O-

💡 O-negative blood can be given to anyone regardless of their blood type, making it the universal donor.

Q8. How many hours of sleep do adults need per night?

✅ Answer: 7-9 hours

💡 The National Sleep Foundation recommends 7-9 hours of sleep per night for adults.

Q9. What does BMI stand for?

✅ Answer: Body Mass Index

💡 BMI (Body Mass Index) is calculated by dividing weight (kg) by height (m²) and is used to classify weight status.

Q10. Which nutrient is the body's primary source of energy?

✅ Answer: Carbohydrates

💡 Carbohydrates are broken down into glucose, the body's primary and preferred source of energy.

Q11. What is the smallest bone in the human body?

✅ Answer: Stapes

💡 The stapes (stirrup bone) in the middle ear is the smallest bone, measuring about 3mm.

Q12. What is the largest bone in the human body?

✅ Answer: Femur

💡 The femur (thigh bone) is the largest and strongest bone in the body.

Q13. How many teeth do adults have?

✅ Answer: 32

💡 Adults typically have 32 teeth, including the 4 wisdom teeth.

Q14. Which organ removes toxins from the blood?

✅ Answer: Liver

💡 The liver is the body's primary detoxification organ, filtering blood and breaking down toxins.

Q15. What is cholesterol?

✅ Answer: A waxy fat-like substance in blood

💡 Cholesterol is a waxy substance found in blood. The body needs it, but high levels of LDL ('bad') cholesterol can clog arteries.

Q16. What causes scurvy?

✅ Answer: Lack of Vitamin C

💡 Scurvy is caused by a deficiency of Vitamin C, leading to fatigue, gum disease, and bleeding.

Q17. What is the normal resting heart rate for adults?

✅ Answer: 60-100 bpm

💡 A normal resting heart rate for adults is 60-100 beats per minute (bpm).

Q18. Which mineral is essential for strong bones?

✅ Answer: Calcium

💡 Calcium is the primary mineral for bone and teeth formation.

Q19. What is diabetes?

✅ Answer: A condition where the body can't properly process blood sugar

💡 Diabetes is a chronic condition where the body either doesn't produce enough insulin (Type 1) or can't use it effectively (Type 2).

Q20. How many liters of blood does an adult body contain?

✅ Answer: 4-5 liters

💡 An average adult has about 4.5-5.5 liters of blood circulating through their body.

Q21. What is the WHO?

✅ Answer: World Health Organization

💡 The WHO (World Health Organization) is a UN agency responsible for international public health.

Q22. What does CPR stand for?

✅ Answer: Cardiopulmonary Resuscitation

💡 CPR (Cardiopulmonary Resuscitation) is an emergency procedure combining chest compressions and rescue breaths.

Q23. Which food group provides the most protein?

✅ Answer: Meat and legumes

💡 Meat, poultry, fish, eggs, and legumes are the richest sources of protein.

Q24. What is a calorie?

✅ Answer: A unit of energy in food

💡 A calorie is a unit of energy that the body uses from food as fuel.

Q25. What is the function of white blood cells?

✅ Answer: Fight infections and diseases

💡 White blood cells (leukocytes) are part of the immune system, defending the body against infections.

Q26. Which disease is caused by a deficiency of iron?

✅ Answer: Anemia

💡 Iron-deficiency anemia occurs when the body lacks enough iron to produce hemoglobin.

Q27. What is the main function of the kidneys?

✅ Answer: Filter blood and produce urine

💡 The kidneys filter blood, removing waste and excess water to produce urine.

Q28. How many chromosomes do humans have?

✅ Answer: 46

💡 Humans have 46 chromosomes arranged in 23 pairs.

Q29. What is mental health?

✅ Answer: Emotional, psychological, and social well-being

💡 Mental health encompasses emotional, psychological, and social well-being.

Q30. What percentage of the human body is water?

✅ Answer: 60-65%

💡 The human body is approximately 60-65% water.

Q31. What is the Heimlich maneuver used for?

✅ Answer: Choking

💡 The Heimlich maneuver (abdominal thrusts) is used to dislodge food or objects from a choking person's airway.

Q32. Which organ is responsible for producing insulin?

✅ Answer: Pancreas

💡 The pancreas produces insulin, a hormone that regulates blood sugar levels.

Q33. What is hypertension?

✅ Answer: High blood pressure

💡 Hypertension (high blood pressure) is when blood pushes too hard against artery walls.

Q34. How many senses do humans typically have?

✅ Answer: 5

💡 Humans have 5 traditional senses: sight, hearing, smell, taste, and touch.

Q35. What is the function of hemoglobin?

✅ Answer: Carry oxygen in red blood cells

💡 Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to all tissues.

Q36. Which vitamin helps in blood clotting?

✅ Answer: Vitamin K

💡 Vitamin K is essential for blood clotting (coagulation).

Q37. What is the primary function of fiber in diet?

✅ Answer: Aid digestion and bowel health

💡 Dietary fiber aids digestion and promotes bowel health.

Q38. What is an antibiotic?

✅ Answer: Medicine that fights bacterial infections

💡 Antibiotics are medicines that fight bacterial infections by killing bacteria or preventing their growth.

Q39. What is the leading cause of death worldwide?

✅ Answer: Cardiovascular disease

💡 Cardiovascular diseases (heart disease and stroke) are the leading cause of death globally.

Q40. What does SPF stand for in sunscreen?

✅ Answer: Sun Protection Factor

💡 SPF (Sun Protection Factor) measures how well a sunscreen protects against UVB rays.

Q41. Which part of the brain controls balance and coordination?

✅ Answer: Cerebellum

💡 The cerebellum, located at the back of the brain, controls balance, coordination, and fine motor movements.

Q42. What is the recommended amount of exercise per week?

✅ Answer: 150 minutes of moderate activity

💡 The WHO recommends at least 150 minutes of moderate-intensity aerobic activity per week for adults.

Q43. What causes a heart attack?

✅ Answer: Blocked blood flow to the heart muscle

💡 A heart attack occurs when blood flow to part of the heart is blocked, usually by a blood clot.

Q44. Which organ stores bile?

✅ Answer: Gallbladder

💡 The gallbladder stores bile produced by the liver. Bile helps digest fats.

Q45. What is the normal blood pressure reading?

✅ Answer: 120/80

💡 A normal blood pressure reading is around 120/80 mmHg.

Q46. What is lactose intolerance?

✅ Answer: Inability to digest lactose (milk sugar)

💡 Lactose intolerance is the inability to fully digest lactose due to a deficiency of the enzyme lactase.

Q47. Which nutrient is essential for healthy vision?

✅ Answer: Vitamin A

💡 Vitamin A is crucial for healthy vision, especially night vision. Found in carrots and sweet potatoes.

Q48. What is a vaccine?

✅ Answer: A substance that stimulates immunity against diseases

💡 A vaccine contains weakened or inactive pathogens that train the immune system to recognize specific diseases.

Q49. How many muscles are in the human body?

✅ Answer: 600+

💡 The human body has over 600 skeletal muscles, making up about 40% of body weight.

Q50. What is the fastest muscle in the human body?

✅ Answer: Eye muscle (orbicularis oculi)

💡 The orbicularis oculi, the muscle that controls blinking, is the fastest muscle.

Ready to Test Yourself?

You've read the answers — now see how many you actually remember. The interactive Health & Lifestyle quiz picks questions at random, adds a countdown timer, and tracks your score.

More Question Sets