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NEET Exam  >  NEET Test  >  Biology Class 11  >  Test: Breathing & Exchange of Gases-2 - NEET MCQ

Breathing & Exchange of Gases-2 - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: Breathing & Exchange of Gases-2 (12 Questions)

You can prepare effectively for NEET Biology Class 11 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Breathing & Exchange of Gases-2". These 12 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 12 minutes
  • - Number of Questions: 12

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Test: Breathing & Exchange of Gases-2 - Question 1
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The principle of exchange of gases at the lungs is :

Detailed Solution: Question 1

Exchange of gases at the lungs by simple diffusion.

Topic in NCERT: Exchange of gases

Line in NCERT: "exchange of o2 and co2 at the alveoli and tissues occur by diffusion."

Test: Breathing & Exchange of Gases-2 - Question 2
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The regulatory centres for respiration are located in :

Detailed Solution: Question 2

A specialisedcentre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for this regulation. In the pons region of the brain called pneumotaxiccentre can moderate the functions of the respiratory rhythm centre.

Topic in NCERT: Regulation of respiration

Line in NCERT: "respiratory rhythm is maintained by the respiratory centre in the medulla region of brain. a pneumotaxic centre in the pons region of the brain and a chemosensitive area in the medulla can alter respiratory mechanism."

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Test: Breathing & Exchange of Gases-2 - Question 3
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In humans, what is true about RBCs?

Detailed Solution: Question 3

Nearly 20-25 per cent of CO2 is transported by RBCs whereas 70 per cent of it is carried as bicarbonate. About 7 per cent of CO2 is carried in a dissolved state through plasma acc. to ncert textbook.

Topic in NCERT: Transport of carbon dioxide

Line in NCERT: "nearly 20-25 per cent of co2 is transported by rbcs whereas 70 per cent of it is carried as bicarbonate."

Test: Breathing & Exchange of Gases-2 - Question 4
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The exchange of gases in :
i. the alveoli that lowers the pO2 of blood and raises its pCO2 is external respiration
ii. the tissues that lowers the pCO2 of blood and raises its pO2 is internal respiration

Detailed Solution: Question 4

In the alveoli, there is high pO2 , low pCO2 , lesser H+ concentration and lower temperature,

Test: Breathing & Exchange of Gases-2 - Question 5
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Habit of Cigarette smoking can lead to :

Detailed Solution: Question 5

The habit of Cigarette smoking can lead to coughing, emphysema and loss of cilia lining the respiratory tract. It contain nicotine that breaks the wall of alveoli to reduce respiratory surface.

Topic in NCERT: Disorders of respiratory system

Line in NCERT: "emphysema is a chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased. one of the major causes of this is cigarette smoking."

Test: Breathing & Exchange of Gases-2 - Question 6
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An increase in lung ventilation rate is caused by which of the following conditions?

Detailed Solution: Question 6

The increase in carbon dioxide (CO2) levels triggers an increase in the lung ventilation rate as it signals a need for more oxygen to be obtained. This leads to an increased demand for oxygen, which increases respiratory rate and depth.

Topic in NCERT: Regulation of respiration

Line in NCERT: "increase in these substances can activate this centre, which in turn can signal the rhythm centre to make necessary adjustments in the respiratory process by which these substances can be eliminated."

Test: Breathing & Exchange of Gases-2 - Question 7
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If TLC is 5500ml, IRV is 2950ml, ERV is 900ml and TV is 500ml then what will be value of RV ?

Detailed Solution: Question 7

RV = TLC - IRV – ERV– TV. On substituting the values, we get 1150ml.

Topic in NCERT: Respiratory volumes and capacities

Line in NCERT: "residual volume (rv): volume of air remaining in the lungs even after a forcible expiration. this averages 1100 ml to 1200 ml."

Test: Breathing & Exchange of Gases-2 - Question 8
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The correct sequence of respiration is
i) Breathing in oxygen
ii) Transportation of gases by the blood
iii) Diffusion of gases between blood and tissues
iv) Diffusion of gases across alveolar membrane
v) Using of oxygen and releasing of carbondioxide

Detailed Solution: Question 8

Respiration involves breathing or pulmonary ventilation by which atmospheric air is drawn in, Diffusion of gases across alveolar membrane, Transport of gases by the blood, Diffusion of gases between blood and tissues.Utilisation of oxygen by the cells.

Topic in NCERT: Respiration

Line in NCERT: "the first step in respiration is breathing by which atmospheric air is taken in (inspiration) and the alveolar air is released out (expiration). exchange of o2 and co2 between deoxygenated blood and alveoli, transport of these gases throughout the body by blood, exchange of o2 and co2 between the oxygenated blood and tissues and utilisation of o2 by the cells (cellular respiration) are the other steps involved."

Test: Breathing & Exchange of Gases-2 - Question 9
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Which statement is correct about respiratory volumes?

Detailed Solution: Question 9

The correct statement regarding respiratory volumes is Option C. Tidal Volume (TV) is indeed the volume of air inspired or expired during a normal respiration, which typically averages about 500 mL. This volume represents the air moved during each breath cycle under resting conditions, not involving forced breathing. Options A, B, and D incorrectly describe the other respiratory volumes, misrepresenting their definitions and typical respiratory mechanics.

Topic in NCERT: Respiratory volumes and capacities

Line in NCERT: "tidal volume (tv): volume of air inspired or expired during a normal respiration. it is approx. 500 ml."

Test: Breathing & Exchange of Gases-2 - Question 10
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Assertion (A) and Reason (R):
Assertion (A): The Partial Pressure of Carbon Dioxide (pCO2) in deoxygenated blood is higher than in oxygenated blood.
Reason (R): Carbon dioxide levels increase in the blood as it collects CO2 from the tissues before reaching the lungs for gas exchange.

Detailed Solution: Question 10

Option A is correct as both the Assertion and the Reason are true, and the Reason is indeed the correct explanation for the Assertion. Deoxygenated blood has a higher pCO2 because it reflects the CO2 levels after the blood has collected carbon dioxide from the tissues, where it is released as a waste product of metabolism. The elevated pCO2 then drives the diffusion of CO2 from the blood into the alveoli in the lungs, facilitating its exhalation. This process is crucial for maintaining the balance of gases and pH in the body.

Topic in NCERT: Transport of gases

Line in NCERT: "at the tissue site where partial pressure of co2 is high due to catabolism, co2 diffuses into blood (rbcs and plasma) and forms hco3 and h+."

Test: Breathing & Exchange of Gases-2 - Question 11
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Which statement is incorrect about the transport of gases in the blood?

Detailed Solution: Question 11

The incorrect statement regarding the transport of gases in the blood is Option c. The enzyme carbonic anhydrase is not absent in RBCs; rather, it is highly abundant and plays a critical role in facilitating the rapid conversion of carbon dioxide and water into bicarbonate and hydrogen ions. This reaction is vital for the efficient transport of carbon dioxide from tissues back to the lungs. The presence of carbonic anhydrase in RBCs greatly enhances the blood’s capacity to carry carbon dioxide, which is primarily transported as bicarbonate.

Topic in NCERT: Transport of gases

Line in NCERT: "rbcs contain a very high concentration of the enzyme, carbonic anhydrase and minute quantities of the same is present in the plasma too."

Test: Breathing & Exchange of Gases-2 - Question 12
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Assertion (A) and Reason (R):
Assertion (A): The Inspiratory Capacity (IC) is calculated by adding the Tidal Volume (TV) to the Expiratory Reserve Volume (ERV).
Reason (R): Inspiratory Capacity represents the total volume of air a person can inspire after a normal expiration.

Detailed Solution: Question 12

Option D is correct because the Assertion is false and the Reason is true. Inspiratory Capacity (IC) is indeed the total volume of air a person can inspire after a normal expiration, but it is calculated by adding Tidal Volume (TV) and the Inspiratory Reserve Volume (IRV), not the Expiratory Reserve Volume (ERV). This error in the Assertion highlights a misunderstanding of the components that make up Inspiratory Capacity, which are TV and IRV, not TV and ERV.

Topic in NCERT: Respiratory volumes and capacities

Line in NCERT: "inspiratory capacity (ic): total volume of air a person can inspire after a normal expiration. this includes tidal volume and inspiratory reserve volume (tv+irv)."

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About this NEET Practice Test

This test contains 12 MCQs on Breathing & Exchange of Gases-2 with detailed solutions for each question. It is part of the Biology Class 11 course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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