Respiratory System MCQs with Answers

Are both human lungs of the same size?

• A.Yes, both lungs are identical in size
• B.No, they are not the same size
• C.Yes, but only in males
• D.No, they are the same size only in children

Which protein is present in the walls of alveoli?

• A.Keratin
• B.Elastin
• C.Collagen
• D.Myosin

The voice box is also called _?

• A.Pharynx
• B.Trachea
• C.Larynx
• D.Epiglottis

Break down of alveoli of lungs is called ?

• A.Emphysema
• B.Asthma
• C.Bronchitis
• D.Pneumonia

Which of the following disorder is associated with degeneration of alveoli?

• A.Bronchitis
• B.Asthma
• C.Emphysema
• D.Pneumonia

The floor of the chest cavity in human is called _?

• A.Pleura
• B.Pericardium
• C.Mediastinum
• D.Diaphragm

Which is an amphipathic molecule secreted by cells in the alveoli that reduces surface tension on the inside of the alveolar walls, preventing the alveoli from collapsing upon exhale and sticking together, thus reducing the effort required for inspiration?

• A.Mucus
• B.Histamine
• C.Lysozyme
• D.Surfactant

Lungs are a part of the ?

• A.Digestive system
• B.Respiratory system
• C.Circulatory system
• D.Nervous system

Each lung consists of around million alveoli.

• A.100
• B.200
• C.300
• D.500

Past Paper MCQ

Bronchitis is a disease related to _?

• A.Digestive tract
• B.Respiratory tract
• C.Nervous system
• D.Circulatory system