Biology Chapter 5 - Part 2
- Created by: elliebaxter
- Created on: 26-01-17 22:32
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- Biology Chapter 5 - Part 2
- Transport in the blood
- Blood plasma transports - CO2 to lungs -soluble products of digestion -urea from liver to kidneys
- Blood is a tissue
- Plasma contains, red blood cells, white blood cells and platelets
- Immune system
- Antigens are proteins on the surface of cells
- White blood cells respond to foreign antigens by producing antibodies
- Human blood groups
- Red blood cells have antigens on their surface (A and B)
- A + b = A a + B = B A + B = AB a + b = O
- Giving b.g A to b.g B person can be fatal
- Plasma contains antibodies (a and b)
- Digestive enzymes
- Amylase
- Produced in glands, pancreas + small intestine,
- Breaks down starch into sugars
- Protease
- Produced in stomach, small intestine and pancreas
- Breaks down proteins into amino acids
- Lipase
- Produced by pancreas and small intestine
- Breaks down lipids to fatty acids and glycerol
- Amylase
- Digestive system 1) Glands (pancreas, salivary) - produce enzymes
- 2) Stomach and small intestine - where digestion occurs
- 3) Liver - produces bile which neutralises stomach acids
- 4) Small intestine - absorbs soluble food
- 5) Large intestine - absorbs water
- Fats emulsified to increase surface area so more space for enzyms to break down
- 4) Small intestine - absorbs soluble food
- 3) Liver - produces bile which neutralises stomach acids
- 2) Stomach and small intestine - where digestion occurs
- Transport in the blood
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