13743820
Beschreibung
Karteikarten von Jocelyn Lee, aktualisiert more than 1 year ago
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Erstellt von Jocelyn Lee
vor mehr als 6 Jahre
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| Frage | Antworten |
| Breathing | using muscles to expand and deflate the lungs |
| Ventilation | air moving into and out of the lungs |
| Respiration | a chemical process that happens in cells |
| Alveolus | a small pocket in the lungs (alveoli) |
| Gas exchange | oxygen and carbon dioxide diffusing into the lungs |
| Why can particles diffuse? | Concentration gradient |
| Why do lungs have a large surface area? | So they can hold more oxygen |
| What do candles need so they can burn? | Air |
| If a snail is placed in a bell jar and the air is removed. What will happen? | The snail will die |
| What is the word equation for aerobic respiration? | Glucose + oxygen --> carbon dioxide + water |
| What else is released during respiration? | Energy |
| One monitor measures oxygen saturation (sats), which is shown as a percentage. 100% means that the blood is fully saturated. What happens if it is below 80%? | Organs can be damaged |
| What does it mean when a doctor says, "You're sats are low."? | You need more oxygen |
| What does RBC stand for? | Red Blood Cells |
| How are the lungs adapted for gas exchange? | They have about 700 million little pockets called alveoli. This gives the lungs a larger surface area - more diffusion occurs. |
| How are thick are the alveoli? | One cell wall thick. |
| What happens when you breathe in? | The ribs contract and the diaphragm move downwards |
| What happens when you breathe out? | The ribs relaxes and the diaphragm moves upwards |
| What is the function of a RBC? | It carries oxygen around the body |
| A change that happens to your body when you run. | Your pulse rate will increase and the muscles will receive more oxygen as you breathe heavier |
| How are substances carried to cells in a tissue? | Concentration gradient |
| What happens when oxygen gets into the blood? | It (oxygen) enters the red blood cells where it sticks to molecules of haemoglobin. This makes the cells change colour, from dark-brown to bright red |
| What happens in capillaries? | Oxygen gradually leaves the RBC and dissolves into the plasma. This leaks through minute holes in the capillaries and form TISSUE FLUIDS, which carries the oxygen to the cells. |
| Dust is prevented from getting into the lungs by a layer of mucus, which is swept away by what? | Cilia (hair like structure on alveoli) |
| When carbon dioxide is added to limewater, what happens to it? | The limewater will turn from clear to cloudy |
| What substance does anaerobic respiration in humans produce? | They produce LACTIC ACID |
| What is anaerobic respiration? | The breakdown of sugars and glucose. It is used when there is not enough oxygen to perform aerobic respration. Glucose --> lactic acid |
| Which gas is needed for respiration in plants? | Carbon dioxide |
| What is the units used to measure air? | Cubic centimetres |
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