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8C

Key Stage 3 Science

QuestionAnswer
List the main organs in the respiratory system Trachea, Lungs & Diaphragm
Name the small structures in the lungs that increase their surface area Alveoli
Which process allows oxygen to move into our blood in the lungs Diffusion
Explain what effect exercise has on breathing rate More exercise -> Faster breathing When muscles work harder they respire more ,Aerobic respiration requires oxygen Faster breathing allows more oxygen into the blood
Name a factor that can reduce gas exchange in the lungs Disease (Cystic Fibrosis, Asthma, Emphysema) Smoking
Describe the test for carbon dioxide, and what a positive result looks like Bubble through lime water - turns cloudy if CO2 is present
What is the word equation for anaerobic respiration Glucose -> Lactic Acid
Which releases more energy; aerobic, or anaerobic respiration Aerobic
What helps protect the lungs from infection Mucus lines the air ways and is moved up and towards the throat by cilia
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