The Mechanism of Breathing (AQA A-Level Biology): Flashcards

Moving air in/out of lungs to maintain gas exchange

Air moves from high to low pressure

Muscle sheet separating thorax from abdomen

Contract; ribs move upward and outward

Contract; ribs move downward and inward

Active process requiring energy

Passive process requiring minimal energy

Lung pressure decreases

$0.5$ $\text{dm}^3$

$\text{tidal volume} \times \text{breathing rate}$ (units: $\text{dm}^3 \text{min}^{-1}$)