Respiratory System MCQs with Answers

An early sign of Anoxia is ?

• A.Headache
• B.Nausea
• C.Dizziness
• D.Blurred vision

Human Respiration releases:

• A.Oxygen
• B.Carbon dioxide
• C.Nitrogen
• D.Hydrogen

An exchange surface is in direct contact with the external environment in the ?

• A.Heart
• B.Liver
• C.Lungs
• D.Kidneys

Respiration involves _?

• A.Only mechanical processes
• B.Only biochemical processes
• C.Mechanical and biochemical processes
• D.Only chemical processes

The correct order of the structures through which air passes is: I) Nasal cavity II) Bronchi III) Larynx IV) Air sacs V) Trachea

• A.I, III, V, II, IV
• B.I, V, III, II, IV
• C.I, III, II, V, IV
• D.I, II, III, V, IV

What is the major function of the human lungs?

• A.Pumping blood throughout the body
• B.Producing digestive enzymes
• C.Filtering waste from the blood
• D.Exhaling CO₂ & inhaling O₂

Range of normal total lung capacity in humans is ?

• A.3-4 liters
• B.9-10 liters
• C.7-8 liters
• D.5-6 liters

The pressure of oxygen in lungs is?

• A.760 torr
• B.95 torr
• C.40 torr
• D.104 torr

Trachea disease concerns _?

• A.Kidneys
• B.Lungs
• C.Heart
• D.Throat

If oxygen is used in the respiration process like humans it is called?

• A.Anaerobic Respiration
• B.Photosynthesis
• C.Fermentation
• D.Aerobic Respiration