NCERT Breathing Exchange Gases model,mock,sample exam,mcqs NEET

Breathing and Exchange of Gases Mock Test-8

Question No:1

Number of RBCs per unit volume of blood is likely to be higher in a person living at high altitudes, because

[A] air is clean and unpolluted
[B] more sunshine is available
[C] air is less dense
[D] vegetation gives out more O2

Question No:2

Wheezing sound is produced in

[A] Asthma
[B] Emphysema
[C] Silicosis
[D] Pneumonia

Question No:3

Major cause of emphysema is

[A] cigarette smoking
[B] allergy
[C] wine consumption
[D] viral infection

Question No:4

Match the column:
Column A Column B
1) Asthma – A. Inflammation of bronchi and bronchioles
2) Emphysema – B. Chronic disorder in which alveolar walls
are damaged due to which respiratory surface is decreased
3) Occupational Respiratory Disorders – C. Long exposure of chemicals can give rise to inflammation leading to fibrosis (proliferation of fibrous tissues)

[A] 1-A, 2-B, 3-C
[B] 1-B.2-A, 3-C
[C] 1-C.2-A, 3-B
[D] 1-0,2-B, 3-A

Question No:5

Emphysema is a

[A] Cardiovascular disease
[B] Pulmonary disease
[C] Renal disease
[D] Pain in lungs

Question No:6

Which of the following is incorrect about occupational respiratory disorder?

[A] It occur in some industries, especially those involving grinding or stone-breaking
[B] Long exposure in such industries leading to fibrosis (proliferation of fibrous tissues)
[C] Workers in such industries can be protected from these disorders by wearing protective masks
[D] It is an allergic disease always

Question No:7

Respiratory control centre lies in

[A] pons
[B] medulla oblongata
[C] both
[D] cerebellum

Question No:8

Two friends are eating together in a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to the improper movement of

[A] tongue
[B] epiglottis
[C] diaphragm
[D] neck

Question No:9

Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

[A] One can breathe out air totally without oxygen
[B] One can breathe out air through Eustachian tubes by closing both the nose and the mouth
[C] One can consciously breathe out by moving the diaphragm alone without moving the ribs at all
[D] The lungs can be made fully empty by forcefully breathing out all air from them

Question No:10

Cartilaginous rings in respiratory passage are present in

[A] Trachea only
[B] Trachea and initial bronchioles only
[C] Trachea, bronchi and initial bronchioles
[D] None

Question No:11

Which of the following represents a larger volume of air than that is normally found in the resting tidal volume or a human lung?

[A] Residual volume
[B] Inspiratory reserve volume
[C] Expiratory reserve volume
[D] All

Question No:12

Mark the correct statement from the following:

[A] Tracheal rings are of hyaline cartilage
[B] Dorsal side of thoracic chamber is formed by sternum
[C] Expiration occurs when there is negative pressure in lungs
[D] All

Question No:13

6000-8000 ml of air is the

[A] vital capacity of lungs
[B] volume of normal expiration per minute
[C] sum of lRV + ERV
[D] inspiratory capacity of lungs

Question No:14

The volume of air that remains in the lungs after normal expiration is

[A] residual volume
[B] vital capacity
[C] expiratory capacity
[D] functional residual capacity

Question No:15

A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This O2

[A] helps in releasing more O2 to the epithelium tissues
[B] acts as a reserve during muscular exercise
[C] raises the pCO2 of blood to 75 mm of Hg
[D] is enough to keep oxyhaemoglobin saturation at 96%