Breathing & Exchange of Gases MCQ Practice Test

Question 1

Breathing is best defined as the:

Accepted Answer

Exchange of O₂ from air with CO₂ from cells

Answer

Oxidation of glucose in cells

Answer

Transport of nutrients

Answer

Filtration of blood

Question 2

Insects respire through:

Accepted Answer

Tracheal tubes

Answer

Gills

Answer

Moist skin

Answer

Lungs

Question 3

The correct order of the air passage is:

Accepted Answer

Pharynx → larynx → trachea → bronchi

Answer

Larynx → pharynx → trachea → bronchi

Answer

Trachea → larynx → bronchi → pharynx

Answer

Bronchi → trachea → larynx → pharynx

Question 4

The 'sound box' of the respiratory tract is the:

Accepted Answer

Larynx

Answer

Pharynx

Answer

Trachea

Answer

Glottis

Question 5

The structural and functional units of the lungs where gas exchange occurs are the:

Accepted Answer

Alveoli

Answer

Bronchi

Answer

Bronchioles

Answer

Trachea

🦠 Breathing & Exchange of Gases MCQs