Biology F214: Excretion 0.0 / 5 ? BiologyExcretionA2/A-levelOCR Created by: [email protected]Created on: 13-06-16 10:45 Define excretion "removal of the waste products from metabolism" 1 of 32 The formation of urea has 2 process Deamination and the Ornithine Cycle 2 of 32 Amino Acids cannot be what in the body? Stored - due to the amine groups 3 of 32 Deamination converts amino acids into? Ammonia (NH3) and Keto Acid 4 of 32 Where is the Keto Acid used? Respiration 5 of 32 What characteristics does ammonia have? Toxic and Soluble 6 of 32 Ornithine Cycle combines ammonia with what? Carbon Dioxide 7 of 32 To form what? Urea (and water) 8 of 32 Why is urea better? Less Toxic and less Soluble 9 of 32 What other major role, apart from urea production does the liver have? Detoxification 10 of 32 What is detoxification? Using enzymes to render toxic molecules less toxic 11 of 32 What is an example of this enzyme in the liver, with a high turn over number? Catalase 12 of 32 This converts what into water and oxygen? Hydrogen Peroxide 13 of 32 The main detoxification occurs with what? Alcohol 14 of 32 What breaks down the alcohol? Hepatocytes (liver cells) 15 of 32 Ethanol converts to Ethanal using what? Ethanol Dehydrogenase 16 of 32 Ethanal converts to what, using what enzyme? Ethanoic Acid using Ethanal Dehydrogenase 17 of 32 Ethanoic Acid is combined with what to form Acetyl Coenzyme A? Coenzyme A 18 of 32 Where is Acetyle Coenzyme A used? Respiration 19 of 32 Increased usage of alcohol can result in what? A 'Fatty Liver' 20 of 32 Why? More ATP formed, so less fats are needed, consequently they are stored 21 of 32 What disease can this lead to? Cirrhosis 22 of 32 Oxygenated blood travels from the heart through the... Aorta 23 of 32 From the Aorta it enters the liver through the... Hepatic Artery 24 of 32 Deoxygenated blood travels from where? Digestive System 25 of 32 Travels into the liver through what? Hepatic Portal Vein 26 of 32 Blood leaves the liver through... Hepatic Vein 27 of 32 Bile Duct carries what to where? Bile to the Gall Bladder 28 of 32 What is the sinusoid? Where the HPV and Hepatic Artery mix in the lobule 29 of 32 What is the function of Kupffer Cells? Break down old red blood cells in the sinusoids 30 of 32 What are they? Specialised macrophages 31 of 32 Hepatocytes contain many? Microvilli 32 of 32
A2 Biology Communication, Homeostasis and Energy (OCR F214) 5.0 / 5 based on 1 rating Teacher recommended
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