🌿 Biology: Mega Quiz on Respiration & Circulation - 20 Multiple Choice Questions

🌿 Biology: Respiration & Circulation Mega Quiz

Master the Human Body and become a Science Superstar!

1. Which respiratory disease is characterized by an allergy to dust? A. Tuberculosis B. Asthma C. Pneumonia D. Bronchitis

2. What is the alternative name for White Blood Cells (WBCs)? A. Thrombocytes B. Leucocytes C. Erythrocytes D. Plasma

3. Which chambers of the heart pump blood OUT of the heart? A. Atria B. Auricles C. Ventricles D. Valves

4. Assertion: Blood pressure rises during physical activities. Reason: Heart beats faster. A. Both are correct & Reason explains Assertion B. Both are correct but Reason doesn't explain it C. Assertion is correct, Reason is false D. Assertion is false, Reason is true

5. What happens to the percentage of Nitrogen in expired air compared to inspired air? A. It increases B. It decreases C. It remains the same D. It turns into oxygen

6. Where can the pulse be felt most easily in our body? A. The lungs B. Wrist and Neck C. The stomach D. The kneecap

7. What is the term for the volume of air moved in or out in a single breath? A. Tidal Volume B. Vital Capacity C. Residual Volume D. Total Lung Volume

8. What is the function of the 'Cilia' found inside the trachea? A. To pump blood B. To sweep out dust and mucus C. To absorb oxygen D. To produce sound

9. Which muscle helps the lungs by contracting and flattening during inhalation? A. Diaphragm B. Biceps C. Heart muscle D. Trachea

10. Respiration that occurs in the absence of oxygen is called: A. Aerobic respiration B. Anaerobic respiration C. Circular respiration D. Transpiration

11. Why does the windpipe (trachea) NOT collapse when there is no air? A. Due to rings of cartilage B. Because it is made of bone C. Because it is always full of blood D. Because it is glued to the lungs

12. What is the average heart beat per minute for a resting adult? A. 50 - 60 times B. 70 - 80 times C. 100 - 120 times D. 30 - 40 times

13. In case of Dengue fever, which blood component is significantly reduced? A. RBCs B. WBCs C. Platelets D. Plasma

14. Which pigment in RBCs helps in the transport of Oxygen? A. Hemoglobin B. Chlorophyll C. Melanin D. Plasma protein

15. Blood plasma is composed of approximately how much water? A. 50% B. 75% C. 90% D. 10%

16. What is the name of the wall that separates the right and left sides of the heart? A. Septum B. Valve C. Ventricle D. Aorta

17. Which blood vessels carry oxygen-rich blood away from the heart? A. Arteries B. Veins C. Capillaries D. Venules

18. Which vessels have thin walls and contain valves to prevent backflow? A. Arteries B. Veins C. Aorta D. Left Ventricle

19. How are arteries and veins interconnected in the body? A. Through the lungs only B. Through a network of capillaries C. They are not connected D. Through the Septum

20. Which respiratory disease is caused by a bacterial infection of the lungs? A. Tuberculosis B. Asthma C. Bronchitis D. Common Cold

🔬 The Biology Learning Corner (Mistakes Review)