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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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4 features of the gas exchange surface |
GOOD VENTILATION GOOD SUPPLY OF BLOOD(dense network of capillaries) VERY THIN SURFACE (one cell thick) LARGE SURFACE AREA(many alveoli) |
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Explain the actions that take place when you breathe in |
Diaphragm contracts and moves down External intercostal muscles contract (upwards and outwards) Internal intercostal muscle relax Volume increase Pressure decreases |
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Explain the actions that take place when we breathe out |
Diaphragm will relax upwards Internal intercostal muscles contract downwards and inwards External intercostal muscles relax Pressure increases Volume decreases |
In do |
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What is cartilage |
The rings of muscle around the trachea which prevents it from being squashed also found in the bronchi |
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Describe how cilia and mucus in the trachea is helpful |
Mucus traps particles such as bacteria and dust particles. Cilia waft a wave like motion in order to move mucus away. This prevents pathogens /dust entering the lungs. |
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Chemical barriers |
Stomach acid ( stomach contains hydrochloric acid, which destroys pathogens in food,as the low pH denatures their enzymes ) Mucus
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Mechanical barriers |
Skin ( blood clots form if skin is broken) Nostril hair( trap pathogens) |
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Chemical equation for aerobic respiration Word equation |
C《6》H《12》6 0《2》~ 6 CO《2》6 H《2》O Glucose + Oxygen ~ Carbon dioxide + Water |
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Chemical equation for photosynthesis Word equation |
6 CO《2》+ 6 H《2》O (sunlight, chlorophyll)~C《6》H《12》6 O 《2》+ 6 O 《2》 Carbon dioxide + water ~(sunlight, chlorophyll) ~ glucose + oxygen |
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Explain how plants convert carbon dioxide to carbohydrates |
Plants use energy from the sunlight, captured by chlorophyll in chloroplasts, in a process called photosynthesis, take glucose. It requires Carbon dioxide which enters a leaf through the stomata and diffuses into the cells. Word equation Chemical equation |
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Depressant drug |
Slows down signals in the nerves and brain |
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Effect of alcohol and heroin |
Powerful depressant Increases reaction times(slow to react) Lack self-control Addiction |
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