Bio 1.4 The Lungs This has now been updated The questions at the end are rather hard GOOD LUCK :) 2.0 / 5 based on 2 ratings ? BiologyCells, tissues and organsGCSEAQA Created by: DanCreated on: 21-03-13 21:47 Where is oxygen absorbed? In the Lungs 1 of 19 How is Carbon Dioxide removed from the body? It is exhaled from the Lungs 2 of 19 Name some Efficient Exchange features of the Lungs. Large Surface Area, Thin Walls (Short Diffusion Path) and an efficient Transport System such as a rich Blood Supply 3 of 19 What purpose does the Alveoli serve? It increases surface area of the lungs 4 of 19 The lungs are the home of what sort of exchange? The Gaseous Exchange Surface. 5 of 19 How do the Lungs maintain a steep Diffusion Gradient? They are Very Well Ventilated 6 of 19 State how Oxygen is Absorbed by the Lungs. Oxygen Diffuses into the many Capillaries surrounding the Alveoli 7 of 19 State how waste Carbon Dioxide leaves the body. Diffuses from Blood in capillaries back out into the lungs, ready to be exhaled. 8 of 19 When we breath in, what happens to the muscles between the ribs? INTERCOSTAL muscles between the ribs contract 9 of 19 How does this effect the rib cage? Causes the rib cage to move up and out 10 of 19 What happens to the diaphragm when we breath in? Contracts and flattens 11 of 19 What is created as a result of all this? A large volume is created in the throax 12 of 19 If there is a large volume what is created as a result of this? A low pressure 13 of 19 How does this help us to breath? Air is drawn into a low pressure 14 of 19 What happens to the ribcage when we breath out Intercostal muscles relax causing the ribcage to go down and in 15 of 19 What about the diaphragm? It relaxes and forms a dome shape 16 of 19 What is created as a result of this? Low volume 17 of 19 Which creates? A high pressure 18 of 19 How does this help us breath out? Air is forced out because of the high pressure 19 of 19
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