MCQ (Practice) - Respiratory System (Level 1)


90 Questions MCQ Test | MCQ (Practice) - Respiratory System (Level 1)


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Attempt MCQ (Practice) - Respiratory System (Level 1) | 90 questions in 60 minutes | Mock test for Class 11 preparation | Free important questions MCQ to study for Class 11 Exam | Download free PDF with solutions
QUESTION: 1

Even when there is no air in it, human trachea does not collapse due to presence
of -

Solution:
QUESTION: 2

Speciality common in the alveoli of lungs and villi of instetine in mammals is that both -

Solution:
QUESTION: 3

The mode of respiration in rabbit is -

Solution:
QUESTION: 4

The structure which does not contribute to the breathing in mammals is -

Solution:
QUESTION: 5

C - shaped cartilaginous rings supporting the trachea are made of -

Solution:
QUESTION: 6

Which of the following is the smallest structure in the lung of rabbit.

Solution:
QUESTION: 7

Rate of breathing in an adult human is -

Solution:
QUESTION: 8

If the diaphragm of a rabbit is perforated, the breathing is -

Solution:
QUESTION: 9

Glottis is opening in the floor of -

Solution:
QUESTION: 10

In mammals ventilation movements of lungs are governed by -

Solution:
QUESTION: 11

Which type of respiration appeared first in the primitive organism and why

Solution:
QUESTION: 12

One of the following is a difference between pulmonary respiration of frog and human -

Solution:
QUESTION: 13

Oxyhaemoglobin is an unstable compound
because -

Solution:
QUESTION: 14

Percentage of O2  present in inhaled air in man is about -

Solution:
QUESTION: 15

The cartilage present in the larynx of rabbit are -

Solution:
QUESTION: 16

Food does not normally enter the trachea because during swallowing of food-

Solution:
QUESTION: 17

If O2  concentration in tissue was almost as high as at the respiratory surface -

Solution:
QUESTION: 18

A person with high fever may be breathing faster than normal. This faster breathing may
be due to -

Solution:
QUESTION: 19

Cilia of trachea transfer -

Solution:
QUESTION: 20

Ratio of oxyhaemoglobin and haemoglobin in the blood is based upon-

Solution:
QUESTION: 21

In a normal man the transport of O2  and CO2 properly, the blood is-

Solution:
QUESTION: 22

The normal shape of diaphragm is-

Solution:
QUESTION: 23

Largest cartilage in the form of a broad ring incomplete posteriorly is-

Solution:
QUESTION: 24

Which of the following statement correctly defines "Bohr effects"-

Solution:
QUESTION: 25

Amount of air that remains always trapped in
respiratory passage is called-

Solution:
QUESTION: 26

Exchange of gases between alveolar air and
alveolar capillaries occur by-

Solution:
QUESTION: 27

Amount of air exchanged in breathing can be
measured with a-

Solution:
QUESTION: 28

Air moves into the lungs when-

Solution:
QUESTION: 29

Normal rate of breathing in man is-

Solution:
QUESTION: 30

Choose the correct equation-

Solution:
QUESTION: 31

Breathing rate in mammals is controlled by
a part of the brain called-

Solution:
QUESTION: 32

Which of the following statements is correct-

Solution:
QUESTION: 33

Rate of of breathing is directly affected by-

Solution:
QUESTION: 34

The breathing rate in a child is-

Solution:
QUESTION: 35

The contraction of internal intercostal muscles
in man causes-

Solution:
QUESTION: 36

During inspiration in mammals, the sternum
moves-

Solution:
QUESTION: 37

Tidal air in mammals is-

Solution:
QUESTION: 38

Intercostal muscles in man extend between
its-

Solution:
QUESTION: 39

The amount of air breathe in and out with the greatest possible efforts is called-

Solution:
QUESTION: 40

The maximum amount of air that our lung
can normally hold is-

Solution:
QUESTION: 41

The blood leaving the lungs has all its haemoglobin oxygenated and gives up oxygen
to the tissue, because-

Solution:
QUESTION: 42

Which of the following increases the oxygen
affinity of Hb-

Solution:
QUESTION: 43

The chemical formula of oxyhaemoglobin is-

Solution:
QUESTION: 44

Haemoglobin has least affinity for-

Solution:
QUESTION: 45

When a frog is completely submerged in water
it can respire only through-

Solution:
QUESTION: 46

Respiratory mechanism is controlled by-

Solution:
QUESTION: 47

Carbon monoxide combines with haemoglobin to form-

Solution:
QUESTION: 48

The percentage of haemoglobin saturated with
oxygen will increase if-

Solution:
QUESTION: 49

Major fraction of CO2 released during cellular respiration is transported in blood to the lungs
in the form of-

Solution:
QUESTION: 50

Which mammal lacks true vocal cords-

Solution:
QUESTION: 51

True organ of sound production in birds is-

Solution:
QUESTION: 52

Expiration involves-

Solution:
QUESTION: 53

During inspiration, air passes into lungs due to-

Solution:
QUESTION: 54

Tidal volume in human beings is-

Solution:
QUESTION: 55

In human beings, CO2  concentration the inspired and expired air is respectively-

Solution:
QUESTION: 56

Oxygen dissociation curve of myoglobin is-

Solution:
QUESTION: 57

Pneumotaxic centre is associated with-

Solution:
QUESTION: 58

Which of the following structures, increases
the respiratory surface of lungs in rabbit-

Solution:
QUESTION: 59

In mammals, the tracheal cartilaginous rings are-

Solution:
QUESTION: 60

Choose the wrong statement-

Solution:
QUESTION: 61

What are the functions that are performed by
the nasal cavity when air passes through it-

Solution:
QUESTION: 62

Dead space air is-

Solution:
QUESTION: 63

The reaction of CO2 with H2O to form carbonic acid occurs-

Solution:
QUESTION: 64

The function of surfactant is/are-

Solution:
QUESTION: 65

The diffusion of CO2 across the alveolar membrane is 20 times faster than that of O2 because-

Solution:
QUESTION: 66

Emphysema is a condition in which-

Solution:
QUESTION: 67

When some food particle enters the windpipe
instead of oesophagus it is expelled by the
process of-

Solution:
QUESTION: 68

All are the respiratory diseases except-

Solution:
QUESTION: 69

Low oxygen tension in the blood causes-

Solution:
QUESTION: 70

Hypoxia is the condition in which less oxygen becomes available to the tissues. This may be due to-

Solution:
QUESTION: 71

One reason for emphysema is-

Solution:
QUESTION: 72

Asthma is caused due to-

Solution:
QUESTION: 73

Hypercapnia means excess of ........in body
fluids-

Solution:
QUESTION: 74

When partial pressure of CO (pCO2) rises, the oxygen dissociation curve of haemoglobin
at 37ºC will-

Solution:
QUESTION: 75

Under a given oxygen concentration in blood,
dissociation of oxyhaemoglobin will increase if-

Solution:
QUESTION: 76

Dissociation curve is connected with-

Solution:
QUESTION: 77

Dissociation of oxyhaemoglobin can be promoted by-

Solution:
QUESTION: 78

An increase in the P50 of an oxyhaemoglobin curve would result from a decrease in-

Solution:
QUESTION: 79

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

Solution:
QUESTION: 80

When man inhales air containing normal concentration of O2 but also carbon monoxide, he suffers from suffocation because -

Solution:
QUESTION: 81

If a person, living at sea level, migrates to about 8000 feet high hill, his blood after about fifteen days will-

Solution:
QUESTION: 82

In an accident, a man dies immediately although their was no injury to brain, kidney, stomach and heart. The probable cause of death may be-

Solution:
QUESTION: 83

Breathing differs from respiration by-

Solution:
QUESTION: 84

During respiration CO2 is transported in the forms of-

Solution:
QUESTION: 85

The most important function of diaphragm of the mammals is-

Solution:
QUESTION: 86

In vertebrates O2 is transporated by the blood as follows-

Solution:
QUESTION: 87

Lung originated from-

Solution:
QUESTION: 88

The respiratory centre leading to faster brathing is on account of-

Solution:
QUESTION: 89

Mountain sickness is due to-

Solution:
QUESTION: 90

'Chloride shift' is the term given to-

Solution:
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