| A | B |
|---|
| eating the right food groups in the right amount | balanced diet |
| carbohydrates are needed for | energy |
| energy is made during | respiration |
| proteins are needed for | growth and repair |
| fats are needed for | energy and insulation |
| vitamins and minerals are needed | in small amounts to keep healthy |
| a lack of vitamin C | causes scurvy |
| a lack of vitamin D | causes rickets |
| a shortage of iron | causes anaemia |
| too little fibre in the diet | causes constipation |
| tests for starch | iodine |
| tests for glucose | benedict's and heat |
| tests for protein | biuret reagent |
| positive test for starch | blue-black |
| positive test for glucose | brick-red |
| positive test for protein | purple |
| negative test for starch | orange - brown |
| negative test for glucose | blue |
| negative test for protein | stays blue |
| test for fat | rub onto filter paper |
| the digestive system | digests and absorbs food |
| digestion is | the breakdown of large insoluble food molecules into smaller soluble ones |
| small soluble nutrients | need to be absorbed into the blood |
| enzymes | are biological catalysts which digest food |
| gullet | oesophagus |
| a muscular bag which churns food | stomach |
| the stomach | contains acid to kill microbes in food |
| digestion is completed here | small intestine |
| water absorption happens here | large intestine |
| finger - like projections which increase surface area in the small intestine | villi |
| where undigested food is stored | rectum |
