8651423
Description
Flashcards by Dragonlord X, updated more than 1 year ago
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Created by Dragonlord X
over 7 years ago
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| Question | Answer |
| What are the 7 life processes | Movement,Respiration,Sensitivity,Growth,Reproduction,Excretion,Nutrition |
| What are harmful microbes called | Pathogens |
| Which of the 7 life processes can a virus NOT do | Respiration,Sensitivity,Excretion,Nutrition,Growth |
| Which microbe invades your cells by making millions of copies of themselves | Virus |
| Which microbe grows longer and releases poison in your cells. This cell also makes antibiotics,bread,wine and beer | Fungi |
| Which microbe multiplies quickly and releases poisons which attack your cells. This microbe is also used to make yogurt. | Bacteria |
| How do Bacteria Reproduce | Bacteria reproduce asexually using Binary Fissirn |
| Name the 4 phases in order | LAG phrase, LOG phrase, Stationary phase and Death phase |
| Why does the Stationary phase stay the same and not go up or down | Because Death Rate = Birth Rate |
| Name 6 ways of preserving food | Freezing,Pickling,Salting and jams,Fermentation, Smoking and Canning |
| What is Pasteurisation? | A process that kills microbes(mainly bacteria). It is not intended to kill all micro organisms in food but to REDUCE the amount of pathogens to prevent disease |
| What are the symptoms for the Ebola disease | Fever,Muscle aching,Vomiting,Very bad diarrhoea, a rash and bleeding inside and outside the body |
| How is Ebola Spread | By Touch |
| Name all the first lines of defence for your body | Earwax,Nasal hair and mucus,Tears, Cilia lining, Stomach, Platelets( these help form a clot when you cut your skin) and Skin |
| What is the second line of defence and what does it do | Phagocytes. It engulfs the microbe (it releases enzymes on the microbe after engulfed) |
| What is the third line of defence and what does it do | Lymphocytes. Have a very large nucleus. Each different microbe has chemicals on its surface called antigens. These antigens are like a bar code identifying which type of disease the microbe will cause. Each Lymphocyte produces one type of antibody on its surface. These antibodies can be released into the blood and fit one particular antigen just like a lock and key. These antibodies stick the pathogens together and then phagocytes come and destroy the them. |
| After we are immune to a disease what is that particular lymphocyte now called | A memory cell |
| What does immunity mean | Having Antibodies for a particular disease |
| What is the difference between Artificial and Natural Immunity | Natural immunity is not induced but Artificial immunity is induced |
| What is the difference between Passive and Active immunity | Passive immunity is temporary Active immunity is permanent |
| What are the seven nutrients? | Water,Fibre,Protein,Fat,Carbohydrates, Vitamins and Minerals |
| Name a Food for each of the 7 nutrients | Carbohydrates: Rice Water: Water Fibre: Peas Beetroot: Vitamins and minerals Fat: Donuts Protein: Eggs |
| How do you test for Protein | Half a pipet of food you think has protein and place it in a test tube. Then add an equal amount (to the food in test tube) of biuret raegent. If protein is present the biuret will change from a blue colour to a purple colour |
| How do you test for starch | Add 2 drops of food you think has starch into test tube. Then add 3 drops of Iodine Solution. If Starch is present iodine will go from a yellow/brown to a blue/black. |
| How do you test for Sugar | Add half a pipet of food you think has sugar in into a test tube. Then add an equal amount of BENEDICT'S solution. Now put the test tube into a water bath (70-80 degrees) for 2 mins. If sugar is present the BENEDICT'S will turn from blue to brick red |
| How do you test for fat | Get a food you think has fat in and place it on a piece of paper. Now rub it. The greasier the paper gets, the more fat there is in the food. |
| What is Digestion | The chemical breakdown of large,insoluble molecules into smaller, soluble ones that can be absorbed into the blood stream. |
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