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Respiration Class 11th Biology | Practice MCQs With Answers For NEET

Practice these important 25 questions from the chapter respiration (biology 11th class).

Diksha Bhatla
updated: 3 Jul 2022

Practice these important 25 questions from the chapter Respiration (Biology 11th class).

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Q.1. Which among the following does not exchange o2 with CO2 through simple diffusion
  1. Earthworms
  2. Earthworms
  3. Sponges
  4. Flatworms
Q.2. Which among the following have well developed respiratory system
  1. Cockroaches
  2. Earthworms
  3. Sponges
  4. Mammals
Q.3. How many lobes are present in right lung
  1. 2
  2. 5
  3. 3
  4. 4
Q.4. Name a sound box which is responsible for sound production
  1. Pharynx
  2. Larynx
  3. Epiglottis
  4. None of the above
Q.5. Thoracic chamber is dorsally formed by
  1. Vertebral column
  2. Sternum
  3. Ribs
  4. Diaphragm
Q.6. Inspiration occurs if the pressure within the lungs is
  1. More than atm pressure
  2. Less tha atm pressure
  3. Equal to atm pressure
  4. None of the above
Q.7. The part starting from external nostril upto terminal bronchioles is known as
  1. Conducting part
  2. Exchange part
  3. Respiratory part
  4. None of the above
Q.8. What is the structural and functional unit of lungs
  1. Bronchioles
  2. Alveoli
  3. Bronchi
  4. Both a and c
Q.9. On an average healthy human breathes how many times per minute
  1. 12-16
  2. 15-16
  3. 20-25
  4. 72
Q.10. What is the inspiratory reserve volume
  1. 2500-3000 ml
  2. 500 ml
  3. 1000-1100 ml
  4. None of the above
Q.11. Volume air inspired or expired during normal respiration is known as
  1. TV
  2. IRV
  3. ERV
  4. RV
Q.12. which among the following is measured by spirometer
  1. Total lung capacity
  2. FRC
  3. RV
  4. TV
Q.13. Pressure contributed by an individual gas in a mixture of gas is known as
  1. Partial pressure
  2. Diffusion pressure
  3. Osmotic pressure
  4. None of the above
Q.14. Solubility of CO2 is how many times higher than O2
  1. 10-15
  2. 30-40
  3. 20-21
  4. 20-25
Q.15. What is the partial pressure of O2 in atmosphere
  1. 156
  2. 159
  3. 94
  4. 40
Q.16. What is the partial pressure of O2 in deoxygenated blood
  1. 45
  2. 40
  3. 95
  4. 43
Q.17. How many percent of co2 is carried by plasma in dissolved form
  1. 6
  2. 7
  3. 20-25
  4. None of the above
Q.18. How many percent of co2 is carried as bicarbonate
  1. 50
  2. 97
  3. 70
  4. 25
Q.19. Every 100ml of deoxy blood delivers approx
  1. 2ml of co2 to alveoli
  2. 3 of co2 to alveoli
  3. 4ml of co2 to alveoli
  4. 7ml of co2 to alveoli
Q.20. RBC contains very high quantity of which enzyme
  1. Carbonic anhydrase
  2. Lysosome
  3. Ligase
  4. None of the above
Q.21. which among the following is caused due to decreased respiratory surface area
  1. Astma
  2. Emphysema
  3. Sclerosis
  4. None of the above
Q.22. Whose role in respiratory rhythm regulation is insignificant
  1. Co2
  2. O2
  3. Both a and b
  4. None of the above
Q.23. Pneumotaxic centre is present in which region of brain
  1. Medulla
  2. Hypothalamus
  3. Pons
  4. None of the above
Q.24. Which type of curve is formed when percent of haemoglobin is plotted against po2
  1. Straight line
  2. Hyperbola
  3. Sigmoid
  4. Parabola
Q.25. which among the following is responsible to shift o2 dissociation curve right
  1. High Pco2
  2. Low pco2
  3. Low H+
  4. None of the above
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