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13 Cards in this Set
- Front
- Back
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What is Blood made of?
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Plasma, red blood cells, white blood cells, platelets
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What is the job of plasma?
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Key word: TRANSPORT
Glucose, amino acids, salts, hormones, anti-bodies, CO2 |
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What are red blood cells?
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Carry O2 around the body
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How are red blood cells adapted to carry O2?
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BIOCONCAVE disks (More Surface area, greate SA:Volume ratio), carry lots of hemoglobin and there is no nucleus so there is more space
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Hemoglobin + 02 <-> ?
(<-> = reversible reaction) |
oxyhemoglobin (in red blood cells)(occurs in lungs)
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What do white blood cells do?
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Make antibodies, defend against disease
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What are capillaries?
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Very thin tubes carrying blod, they allow substances to leave the blood and enter the body's cells. No cell in your body is more than 0.05mm from a capillary.
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Compare: Pressure, Pulse, Lumen (hole), valves, wall thickness and wall elasticity in veins and arteries
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Arteries: High pressure, there is a pulse, small lumen, no valves, thick walls and high elasticity
Veins:Low pressure, no pulse, big lumen, valves, thin wall and low elasticity |
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How is a leaf adapted for gas exchange? (4)
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Flat and broad (thus, large surface area for absorbing/releasing), Thin (diffusion is only effective through short distances), holes in the stomata and air spaces
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Where is water and mineral ion uptake done in a plant?
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The ROOT HAIR ZONES ONLY! Not the entire root, just at the every end on the specialised cells
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How is water absorbed?
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By osmosis up the XYLEM
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What is the unavoidable water loss that plants have when they open their stoma called?
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Transpiration
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What is the fundamental difference between the breathing system of insects compared to mammals, fish, and amphibians? (2)
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Blood is NOT involved in transporting gasses around the body
Air is delivered to the body cells by a system of tubes called the TRACHEAL SYSTEM |
