biology year 8 0.0 / 5 ? BiologyCirculationGCSEAQA Created by: Alice Holden 13Created on: 18-05-16 16:25 What is the difference between breathing and respiration? Breating is an exchange of gases. Respiration is a reaction in the cells to release energy. 1 of 32 What is the word equation for respiration? glucose + oxygen --) carbon dioxide + water + energy 2 of 32 What part of air do we take in to our body and why? Oxygen because it is needed for respiration in cells. 3 of 32 What do we breath out that ir a waste product from respiration? Carbon dioxide, dissolved in plasma in blood 4 of 32 Where does carbon dioxide come from? Respiration in cells, waste product 5 of 32 What carries oxygen in blood? haemoglobin in red blood cells 6 of 32 What do white blood cells do in our body? They fight disease and produce antibodies. 7 of 32 What vessles carry blood away from the heart? Arteries 8 of 32 What vessels carry blood back to our heart? veins 9 of 32 What is the name of the vesselthat has thin walls, which helps food, oxygen and waste pass through to neighbouring cells? Capillaries 10 of 32 What are the 7 nutrients required for a balanced diet? Carbohydrates, fat, protein, vitamins, minerals, fibre and water 11 of 32 Where does digestion start in our bodies? In our mouth (mechanical digestion) 12 of 32 Why do we chew our food? To mix it with saliva to make it easier to swallow and to make it into smaller bits to ease digestion. 13 of 32 What breaks down food molecules in our alimentary canal? Enzymes 14 of 32 Why do foods need to be broken down in our alimentary canal? So that they are soluble and small enough to dissolve into the blood stream. 15 of 32 Why is it dangerous to eat too much saturated fat in our diet? It can lead to fats blocking our blood vessels which can cause heart attacks. 16 of 32 What are the three harmful substances in smoking? Nicotine, carbon monoxide and tar 17 of 32 what are the three diseaces that smoking can cause? lung cancer, bronchitis, emphysema 18 of 32 What do carbs give us? glucose - needed for energy 19 of 32 What does protein give us? Amino acids - need for groth, repair of cells 20 of 32 what do fats give us? fatty acids and glycerol - energy and insulation of cells 21 of 32 What does lack of vitamins cause? Scurvy 22 of 32 What do our kidneys do in our body? Remove waste chemicals from the blood, urea 23 of 32 Why is the small intestine so good at absorbing food? it is long and has a long surface area, thin lining and good blood supply. 24 of 32 What is meant by egestion? getting rid of waste products from digestion 25 of 32 what is meant by environmental variation? variation in organisms that is affectd by how things live, eat, schooling e.g weight. 26 of 32 What is a chromosone? inside a nucleus there are pairs of threadlike chromosones (23 pairs in humans) 27 of 32 what do chromosones do? carry genes which determine our characteristics 28 of 32 how many chromosones do humas have? 23 pairs, 46 29 of 32 What is a gene? 23 singe chromosones, so that when fertiliseation occurs, the new cell has a complete set. 30 of 32 Whwere do you find chromosones? inside the nucleus of each cell. 31 of 32 Name one bacterial disease and one caused by a virus. bacteria- salmonella, tuberculosis. virus - chicken pox, flu, aids ,measels 32 of 32
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