8B Respiration and Gas Exchange LCWC PDF

8B respiration and gas exchange: Look, Cover, Write, Check Note: Do not use the LCWC sheets as your only source of revision. These are quick knowledge recall activities. Your revision should include revision material and practice exam questions. 1. Read the questions and answers. 2. Fold ove...

8B respiration and gas exchange: Look, Cover, Write, Check Note: Do not use the LCWC sheets as your only source of revision. These are quick knowledge recall activities. Your revision should include revision material and practice exam questions. 1. Read the questions and answers. 2. Fold over the sheet so that you cannot see the answers in column 1. 3. Write the answers on column 2. 4. Check to see if you are right. 5. Keep doing this until you get them all right. Question 4 3 2 1 1. Label the main structures of the lungs. 2. What is the function The lung provide a of the lungs? gas exchange surface for Oxygen and Carbon dioxide 3. How are the lungs Many alveoli to adapted for their provide a large SA function? Good blood supply maintains large concentration gradient Short diffusion pathway from alveoli into blood 4. What happens to Diaphragm contracts our thorax when we and flattens inhale? Intercostal muscles contract and move the rib cage up and out Size of thorax increases Decrease in pressure in lungs Air drawn into the lungs 5. What is different Less Oxygen about the air we More Carbon Dioxide exhale compare to More Water inhale? Higher temperature 6. How does asthma Inflammation of the effect the gas airways and excess exchange system? mucus makes it harder for air to enter and exit lungs 7. How does exercise As you exercise the effect breathing muscles need more rate? oxygen for respiration causing your breathing rate to increase 8. How does smoking Tar lines alveoli cigarettes affect Heat and carbon your lungs? dioxide damage the  cilia that line the airways 9. What are long term Lung cancer and diseases associated Emphysema with smoking cigarettes 10. What is respiration? A chemical reaction to release energy from glucose. It occurs in the mitochondria. 11. What is the word Glucose + oxygen à equation for aerobic Carbon dioxide + respiration? water + (energy) 12. What is the word Glucose à lactic acid equation for + (energy) anaerobic respiration in humans? 13. What is the word Glucose à carbon equation for dioxide + ethanol + anaerobic (energy) respiration in yeast and plants? 14. Describe a test you Bubble Carbon could use for dioxide through carbon dioxide limewater, if it goes cloudy then carbon dioxide is present