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NEET UG Breathing and Exchange of Gases — practice questions — page 3

Explore 107 free Breathing and Exchange of Gases questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Breathing and Exchange of Gases questions and exercises with answers

Showing questions 61–90 of 107.

Roughly how much air does a healthy man inspire or expire per minute at rest?Read the answer and worked solution →What is the average inspiratory reserve volume (IRV)?Read the answer and worked solution →What is the average residual volume (RV) of human lungs?Read the answer and worked solution →Inspiratory capacity (IC) is the sum of:Read the answer and worked solution →Functional residual capacity (FRC) equals:Read the answer and worked solution →Total lung capacity (TLC) can be written as:Read the answer and worked solution →A person has TV 500 mL, IRV 2500 mL and ERV 1000 mL. What is the vital capacity?Read the answer and worked solution →If ERV is 1000 mL and RV is 1200 mL, what is the functional residual capacity?Read the answer and worked solution →What are the primary sites of gas exchange in human lungs?Read the answer and worked solution →By what process are O2 and CO2 exchanged at the alveoli and tissues?Read the answer and worked solution →What is the partial pressure of oxygen in atmospheric air?Read the answer and worked solution →Compared with oxygen, how soluble is carbon dioxide?Read the answer and worked solution →What type of epithelium lines the alveoli in the diffusion membrane?Read the answer and worked solution →How much of blood oxygen is carried dissolved in plasma?Read the answer and worked solution →In what form is about 70 per cent of blood carbon dioxide carried?Read the answer and worked solution →About what share of carbon dioxide travels dissolved in plasma?Read the answer and worked solution →At most, how many O2 molecules can one haemoglobin molecule carry?Read the answer and worked solution →What shape does the oxygen dissociation curve of haemoglobin have?Read the answer and worked solution →Which conditions favour oxyhaemoglobin formation?Read the answer and worked solution →How much O2 does 100 ml of oxygenated blood deliver to tissues normally?Read the answer and worked solution →Which enzyme in RBCs speeds up the reaction of CO2 with water?Read the answer and worked solution →Carbamino-haemoglobin forms most readily when:Read the answer and worked solution →Where is the respiratory rhythm centre of the brain located?Read the answer and worked solution →The pneumotaxic centre, which moderates the rhythm centre, lies in the:Read the answer and worked solution →The chemosensitive area near the rhythm centre responds mainly to:Read the answer and worked solution →Peripheral CO2 and H+ receptors lie on which vessels?Read the answer and worked solution →How important is oxygen in regulating the human respiratory rhythm?Read the answer and worked solution →In which chronic disorder are alveolar walls damaged, reducing the respiratory surface?Read the answer and worked solution →What is a major cause of emphysema?Read the answer and worked solution →About how large is the anatomical dead space of an adult human?Read the answer and worked solution →

Worked practice questions

Roughly how much air does a healthy man inspire or expire per minute at rest?

  1. 500 to 800 mL
  2. 1000 to 1500 mL
  3. 6000 to 8000 mL
  4. 20000 to 25000 mL
Show answer and solution

Correct answer: C. 6000 to 8000 mL

A tidal volume near 500 mL at 12 to 16 breaths a minute gives about 6000 to 8000 mL per minute.

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What is the average inspiratory reserve volume (IRV)?

  1. 500 mL to 600 mL
  2. 1000 mL to 1100 mL
  3. 2500 mL to 3000 mL
  4. 1100 mL to 1200 mL
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Correct answer: C. 2500 mL to 3000 mL

The extra air a person can draw in by forcible inspiration averages 2500 to 3000 mL.

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What is the average residual volume (RV) of human lungs?

  1. 6000 mL to 8000 mL
  2. 1100 mL to 1200 mL
  3. 2500 mL to 3000 mL
  4. 150 mL to 200 mL
Show answer and solution

Correct answer: B. 1100 mL to 1200 mL

About 1100 to 1200 mL of air stays in the lungs even after the most forceful expiration.

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