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Assertion Reason Test: Breathing & Exchange of Gases - NEET MCQ


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11 Questions MCQ Test - Assertion Reason Test: Breathing & Exchange of Gases

Assertion Reason Test: Breathing & Exchange of Gases for NEET 2024 is part of NEET preparation. The Assertion Reason Test: Breathing & Exchange of Gases questions and answers have been prepared according to the NEET exam syllabus.The Assertion Reason Test: Breathing & Exchange of Gases MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion Reason Test: Breathing & Exchange of Gases below.
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Assertion Reason Test: Breathing & Exchange of Gases - Question 1

A: Pneumotaxic centre controls the rate of respiration.

R: Primarily, it controls the switch-off point of inspiration.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 1
Pneumotaxic centres are switched off centres of inspiration.

Assertion Reason Test: Breathing & Exchange of Gases - Question 2

A: Asthmatic patients use bronchiodilator drugs as well as inhalers for symptomatic relief.

R: Asthma is characterized by the spasm of smooth muscles in bronchioles' wall due to allergen.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 2
Asthma is an allergic reaction.

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Assertion Reason Test: Breathing & Exchange of Gases - Question 3

A: Major part of carbon dioxide is transported in the form of sodium bicarbonate.

R: 0.3 ml of carbon dioxide is transported per 100 ml of blood in a dissolved state in plasma of blood.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 3

Only 7% of CO2 is transported in a dissolved state in plasma of blood.

Assertion Reason Test: Breathing & Exchange of Gases - Question 4

A: In cockroach, inspiration is a passive process.

R: Expansion of the abdominal cavity allows the space of expansion of the tracheal trunk. As a result, air enters through the spiracle.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 4
In cockroach, inspiration is a passive process.

Assertion Reason Test: Breathing & Exchange of Gases - Question 5

A: Diffusion of carbon dioxide is 20 times faster than oxygen.

R: It is due to the difference in partial pressure as well as solubility of diffusing gases.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 5

Solubility of CO2 is 20 times faster than O2.

Assertion Reason Test: Breathing & Exchange of Gases - Question 6

A: The passage starting with the external nostrils up to the terminal bronchiole constitute the respiratory part.

R: The respiratory part transports the air to the alveoli, clears it from the foreign material, humidified and brings the air to body temperature.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 6
The passage starting with the external nostrils up to the terminal bronchiole constitute the conducting part.

Assertion Reason Test: Breathing & Exchange of Gases - Question 7

A: Normal expiration during quiet breathing, unlike inspiration, is a passive process because no muscular contractions are involved.

R: Normal expiration results from the elastic recoil of the chest wall and lungs.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 7
Normal expiration in humans is due to relaxation of muscles.

Assertion Reason Test: Breathing & Exchange of Gases - Question 8

A: Human blood always contains more CO2 than blood oxygen.

R: Solubility coefficient of CO2 is more than O2.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 8

In 100 ml oxygenated blood, the amount of O2 is about 20 ml while CO2 is about 48 ml.

Assertion Reason Test: Breathing & Exchange of Gases - Question 9

A: When a person starts doing exercise, rate and depth of breathing increase even before changes in pO2, pCO2 or H+ concentration.

R: The main stimulus for these quick changes is input from the proprioreceptors, which monitor joints and muscles' movements.

Assertion Reason Test: Breathing & Exchange of Gases - Question 10

A: Emphysema is a chronic obstructive disease of the lung, causing irreversible distension and loss of alveoli elasticity.

R: Emphysema is preventable if chronic exposure to smoke (cigarette and others) and pollutants is avoided.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 10
Emphysema is due to inflation of alveoli.

Assertion Reason Test: Breathing & Exchange of Gases - Question 11

A: 100 ml of venous blood has 14.4 ml of O2, i.e. it is still 75% saturated with oxygen in normal condition.

R: About 4.6 ml of O2, i.e. 25% diffuses from arterial blood into the tissue during exercise.

Detailed Solution for Assertion Reason Test: Breathing & Exchange of Gases - Question 11

Because during normal conditions, oxygen demand in tissue is low.

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