GCSE BIOLOGY BREATHING AQA B3

Question	Answer
Breathing/ Ventilation	The process by which air moves in and out of the lungs
Respiration	The chemical process by which glucose is converted into sugar + energy. (In the mitochondria
What are in the lungs that use diffusion?	Alveoli
Adaptations	-They are one cell thick -Moist -Large surface area -Large blood supply
Breathing in	-Ribcage moves up and out -The diaphragm contracts and flattens -Larger volume in thorax -Pressure decreases in the thorax -Air is brought into the lungs
Breathing out	-The ribcage moves inwards and down -The diaphragm relaxes and moves up -Smaller volume -The pressure increases in the thorax Causing air to move out of the lungs
Air Breathed in vs. Exhaled air	Inhaled air -More oxygen -Less carbon dioxide -Less water vapour -Same nitrogen Exhaled air -Less oxygen -More carbon dioxide -Same nitrogen

Resource summary

	Created by Megan Briggs over 7 years ago