The stomata controls gas exchange by letting in co2 in and oxygen + water out. it is surrounded by 2 guard cells that open and close to let in or out substances
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What experiment can you use to find stomatal density?
The 'nail polish experiment'
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How is the alveoli adapted to its function in the lungs
large surface area,one cell thick walls, capillaries close to walls of alveoli
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Describe gas exchange in mammals
When you inhale you diaphragm contracts and your rib cage moves up and out, creating more space, creating lower pressure so air moves into the lungs
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How can you measure lung function
By breathing into a plastic bag/sealed container then rolling it up until it cannot be rolled up anymore. The number at the top of the bag is how much you can hold in your lungs
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How does asthma effect breathing
Swells up trachea meaning less oxygen can get into the lungs
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How does excersise effect breathing
Breathing rate increase when we excercise to provide more 02 and glucose to the muscles to release energy that is needed for muscles to contract
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Describe the effects of smoking
Smoking causes the alveoli and airways to be full of dirt particles, chemicals ad tar
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What is emphysema
Emphysema is a smoking related disease that happens when smoke damages the walls of the alveoli, changing the shape and reducing the surface area, causing insufficient gas exchange
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Name 4 smoking related diseases
lung cancer
throat cancer
bronchitis
ulcers of the stomach
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Other cards in this set
Card 2
Front
What experiment can you use to find stomatal density?
Back
The 'nail polish experiment'
Card 3
Front
How is the alveoli adapted to its function in the lungs
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