Practice Respiratory System RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Biology question set covers important concepts related to the human respiratory system, respiratory organs, breathing and the exchange of gases.
The questions cover important areas such as the nose, nasal cavity, pharynx, larynx, trachea, bronchi, lungs, alveoli, diaphragm, breathing mechanism, inhalation and exhalation, exchange of oxygen and carbon dioxide, and cellular respiration. These concepts are important for General Science and Biology preparation for Railway examinations.
Start practicing Respiratory System RRB PYQs with answers and explanations and strengthen your Railway Biology preparation.
41
The maximum amount of air that can be exhaled after maximal inspiration is called _____.
RRB JE
27/05/2019 (Shift-I)
2019
✓ Answer:DLung volume
The source key gives D, lung volume. The precise physiological term is vital capacity, which is not offered among the options.
42
During inhalation, lungs are filled with air due to:
RRB Group-D
31/10/2018 (Shift-I)
2018
✓ Answer:CLung inflation
The diaphragm contracts and the thoracic cavity expands during inhalation, lowering pressure and causing the lungs to inflate as air enters.
43
A protruding part of the throat associated with the growing voice box in boys is called:
RRB NTPC (Stage-I)
11/04/2016 (Shift-I)
2016
✓ Answer:DAdam's apple
The Adam's apple is the visible prominence of the thyroid cartilage of the larynx. It often becomes more prominent during male puberty.
44
Exhalation occurs by _____.
RRB Group-D
19/09/2018 (Shift-III)
2018
✓ Answer:BLung deflation
During quiet exhalation, the diaphragm relaxes and elastic recoil reduces lung volume, pushing air out.
45
Our lungs contain _____ cells.
RRB NTPC (Stage-I)
29/04/2016 (Shift-II)
2016
✓ Answer:D300 million
The source key gives 300 million. The question appears to refer to the traditional estimate of alveoli, not the total number of lung cells; alveoli are multicellular air sacs.
46
The breathing process involves _____.
RRB Group-D
30/10/2018 (Shift-III)
2018
✓ Answer:AInspiration and expiration
Breathing consists of inspiration, when air enters the lungs, and expiration, when air leaves.
47
Which of the following is included in exhaled air?
RRB NTPC (Stage-I)
16/04/2016 (Shift-I)
2016
✓ Answer:DNitrogen
The source key selects nitrogen. However, exhaled air also contains water vapour, making both C and D valid under the wording provided.
48
In the human body, the respiratory pigment is _____.
RRB Group-D
27/09/2018 (Shift-III)
2018
✓ Answer:BHaemoglobin
Haemoglobin in red blood cells binds oxygen reversibly and transports respiratory gases.
49
During each breathing cycle, when air is taken in and thrown out, the lungs always contain some amount of air so that there is sufficient time for oxygen to be absorbed and carbon dioxide to be released. What is this amount of air called?
RRB Group-D
05/09/2022 (Shift-II)
2022
✓ Answer:DResidual volume
The source answer is residual volume. Strictly, residual volume is the air remaining after maximal forced expiration; air remaining after normal expiration is functional residual capacity.
50
Inflammation of the mucous membrane is called _____.
RRB NTPC (Stage-I)
19/04/2016 (Shift-I)
2016
✓ Answer:ABronchitis
The intended answer is bronchitis, meaning inflammation of the lining of the bronchi. The question is incomplete because it does not specify which mucous membrane.
Each question includes the correct answer and a clear explanation, helping you understand the concept behind the answer and revise important Biology topics effectively. Practising Respiratory System Previous Year Questions can also help you become familiar with the types of Biology questions asked in RRB examinations.
Whether you are preparing for RRB NTPC Respiratory System PYQ, RRB Group D Respiratory System PYQ, RRB JE Respiratory System PYQ, RRB ALP Respiratory System PYQ, or RRB Technician Respiratory System PYQ, practice these previous year questions regularly to strengthen your Biology preparation.
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