1. The brain is the central control center of the nervous system. What is its main function?
A. To pump blood to all parts of the body.
B. To filter waste products from the blood.
C. To process information, control thoughts, emotions, and body movements.
D. To produce hormones that regulate growth and metabolism.
2. What is the primary function of antibodies produced by the immune system?
A. To transport oxygen.
B. To carry nutrients.
C. To neutralize or mark specific pathogens for destruction.
D. To help blood clot.
3. Which nutrient is essential for building and repairing tissues, such as muscles?
A. Carbohydrates
B. Vitamins
C. Minerals
D. Proteins
4. Why is it important to drink enough water daily?
A. To build muscle mass.
B. To aid in digestion, regulate body temperature, and transport nutrients.
C. To strengthen bones.
D. To increase energy levels.
5. What is the role of the lungs in the respiratory system?
A. To digest food and absorb nutrients.
B. To exchange gases, taking in oxygen and releasing carbon dioxide.
C. To transport blood and vital substances.
D. To filter waste products from the blood.
6. Which of the following is a key function of the skeletal system?
A. To pump blood throughout the body.
B. To produce digestive enzymes.
C. To provide structural support, protect organs, and enable movement.
D. To filter harmful substances from the blood.
7. What is the primary role of the endocrine system?
A. To transport oxygen and nutrients.
B. To produce and secrete hormones that regulate various body functions.
C. To filter waste products from the blood.
D. To facilitate gas exchange in the lungs.
8. Which system is responsible for breaking down food and absorbing nutrients?
A. Circulatory system
B. Respiratory system
C. Digestive system
D. Nervous system
9. Which of the following is a function of the digestive system?
A. To transport oxygen to the bodys cells.
B. To break down food into nutrients that can be absorbed.
C. To protect the body from diseases.
D. To enable movement and support the body.
10. Which type of nutrient is crucial for maintaining healthy bones and teeth?
A. Iron
B. Vitamin C
C. Calcium
D. Fiber
11. What is the function of the heart in the circulatory system?
A. To filter waste from the blood.
B. To pump blood to all parts of the body.
C. To transport oxygen to the lungs.
D. To produce antibodies.
12. What is the primary role of the immune system?
A. To break down food into absorbable nutrients.
B. To transport oxygen and carbon dioxide.
C. To defend the body against pathogens like bacteria and viruses.
D. To regulate body temperature and fluid balance.
13. What is the importance of a balanced diet for maintaining good health?
A. It provides only energy for daily activities.
B. It ensures the body receives all necessary nutrients for growth, repair, and proper functioning.
C. It solely focuses on preventing infections.
D. It only helps in maintaining a healthy weight.
14. What is the purpose of the nervous system?
A. To provide structural support and protect organs.
B. To digest food and absorb nutrients.
C. To coordinate bodily functions and respond to stimuli.
D. To transport oxygen and carbon dioxide.
15. What is the main role of red blood cells?
A. To fight off infections.
B. To transport oxygen from the lungs to the bodys tissues.
C. To help blood clot.
D. To carry nutrients to cells.
16. The skin is the largest organ of the body. What is one of its crucial functions?
A. To produce red blood cells.
B. To regulate blood sugar levels.
C. To act as a protective barrier against the environment and regulate body temperature.
D. To digest food and absorb nutrients.
17. What is the main function of white blood cells in the human body?
A. To carry oxygen to tissues.
B. To clot blood and stop bleeding.
C. To fight infections and protect the body from pathogens.
D. To transport nutrients and hormones.
18. Which part of the digestive system is primarily responsible for absorbing most of the nutrients from digested food?
A. Stomach
B. Esophagus
C. Small intestine
D. Large intestine
19. What is the function of platelets in the blood?
A. To transport oxygen.
B. To fight infections.
C. To help blood clot at the site of an injury.
D. To carry nutrients to cells.
20. Which organ produces bile, essential for fat digestion?
A. Stomach
B. Pancreas
C. Liver
D. Gallbladder
21. What is the significance of regular physical exercise for human health?
A. It primarily strengthens bones and prevents fractures.
B. It improves cardiovascular health, strengthens muscles, and boosts mood.
C. It is solely responsible for nutrient absorption.
D. It helps the body eliminate waste products through sweat.
22. Which of the following is a disease related to the respiratory system?
A. Diabetes
B. Asthma
C. Anemia
D. Arthritis
23. Which type of nutrient provides the body with energy and helps absorb fat-soluble vitamins?
A. Proteins
B. Carbohydrates
C. Fats
D. Vitamins
24. Which organ filters waste products from the blood and produces urine?
A. Liver
B. Kidneys
C. Pancreas
D. Spleen
25. What is the primary function of the circulatory system in the human body?
A. To break down food into smaller molecules for absorption.
B. To transport oxygen, nutrients, and waste products throughout the body.
C. To control and coordinate all body activities and respond to stimuli.
D. To protect the body from foreign invaders and diseases.
