What role do intercostal muscles play during breathing?

Increase the volume of the lungs

Protect the trachea from damage

Decrease the pressure in the chest cavity

Facilitate the movement of the diaphragm

Why is cartilage important in the trachea?

It prevents the trachea from collapsing

It increases the volume of inspired air

It assists in the production of mucus

What is a key difference between inspired and expired air?

Inspired air contains more carbon dioxide

Expired air has a higher oxygen content

Expired air has a higher concentration of carbon dioxide

Inspired air has a higher concentration of nitrogen

How does physical activity affect breathing rate?

It decreases the breathing rate

It has no effect on the breathing rate

It increases the breathing rate

It stabilizes the breathing rate

Which of the following describes a volume change in the lungs during inhalation?

The lung volume remains constant

How does the presence of mucus in the respiratory tract affect gas exchange?

It enhances the diffusion of gases

It reduces the surface area for gas exchange

It increases the rate of oxygen uptake

It facilitates the removal of carbon dioxide

What is the primary function of the alveoli in the lungs?

To transport oxygen to the blood

To produce mucus for the respiratory tract

To facilitate gas exchange between the air and the blood

To regulate the pH of the blood

How does the body protect the breathing system from harmful particles?

By increasing the respiratory rate

By secreting mucus and using cilia

Gas Exchange in Humans Free MCQ Practice Test with Solutions

	Biology for GCSE/IGCSE 110 videos\|158 docs\|34 tests

	Biology for GCSE/IGCSE 110 videos\|158 docs\|34 tests

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