Breathing and Exercise Quiz

Which gas makes up the largest percentage of inhaled air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

What is the main difference in the composition of exhaled air compared to inhaled air?

• Exhaled air contains more oxygen

• Exhaled air contains more carbon dioxide

• Exhaled air contains more nitrogen

• Exhaled air contains less water vapour

What is the term for the amount of air you breathe in or out during a normal breath?

• Vital capacity

• Tidal volume

• Residual volume

• Peak flow

Which piece of equipment is commonly used to measure peak flow?

• Thermometer

• Peak flow metre

• Stethoscope

• Sphygmomanometer

What happens to your breathing rate during exercise?

• It decreases

• It stays the same

• It increases

• It stops

Which gas is present in a higher percentage in exhaled air than in inhaled air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Argon

What is vital capacity?

• The amount of air left in the lungs after a normal breath

• The maximum amount of air a person can exhale after a maximum inhalation

• The amount of air breathed in during a normal breath

• The speed of air flow during exhalation

Which of the following best describes the change in oxygen content from inhaled to exhaled air?

• Oxygen content increases

• Oxygen content decreases

• Oxygen content stays the same

• Oxygen is completely removed

Why does tidal volume increase during exercise?

• To reduce body temperature

• To supply more oxygen to the muscles

• To remove nitrogen from the body

• To slow down the heart rate

A student measures their vital capacity using a spirometer. Which step should they take to ensure an accurate measurement?

• Take a shallow breath before exhaling

• Exhale as quickly as possible

• Inhale as deeply as possible, then exhale fully into the spirometer

• Hold their breath for as long as possible