Understanding the Breathing Process

What is the primary function of cilia and mucus in the nose during inhalation?

• To filter and warm the air

• To cool the air

• To produce sound

• To speed up the air flow

Which part of the respiratory system carries air from the throat to the lungs?

• Diaphragm

• Alveoli

• Bronchioles

• Trachea

How does the diaphragm contribute to inhalation?

• It expands the ribcage

• It relaxes and moves upward

• It contracts and moves downward

• It filters the air

What happens to the intercostal muscles during exhalation?

• They contract to expand the chest cavity

• They relax to decrease the chest cavity space

• They produce mucus

• They filter carbon dioxide

What is the main gas expelled from the body during exhalation?

• Helium

• Carbon Dioxide

• Nitrogen

• Oxygen