[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-208120-en":3,"doc-seo-208120-105":30,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},208120,962088006270,"eBook King","https://ap-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45",4,"Exam","GraspIT - AQA GCSE Organisation Questions - Exam Practice Answers","Practice answers for AQA GCSE biology organisation topics, focusing on levels of organisation in the human circulatory system and how tissues and organs work together. Includes digestion and the role of enzymes, especially how bile neutralises acid, supports optimum pH, and enables fat digestion via lipase and emulsification. Covers enzyme activity across temperature, protease effectiveness in acidic conditions, heart structure and function, double circulation, valve roles, and coronary heart disease treatments and risk factors. Also addresses CHD evidence and extended responses on pregnancy risks from smoking and alcohol.","GraspIT – AQA GCSE Organisation Questions  \nA . Principles of organisation  \n1. Describe the levels of organisation in the human circulatory system in size order from the smallest part.  \n(4)  \n● Muscle Cell – can contract and respiration occurs here  \n● Muscle (cardiac) tissue – Group of muscle cells working together to contract and respire (cardiac muscle does not fatigue)  \n● Heart (organ)–muscle, valves and blood vessels, puts blood under pressure  \n● Circulatory system – Heart, blood and blood vessels working together to pump blood around the body.  \nB. Animal tissues, organs and organ systems Part 1  \n1. Explain why enzymes are needed in digestion. (4)  \n● Biological catalysts  \n● Breakdown large insoluble molecules (in food)  \n● Into small soluble molecules  \n● That can be absorbed into the blood  \n2. Explain how the release of bile into the small intestines increases the rate of fat breakdown. (3)  \n● Neutralise acid  \n● Maintain optimum pH  \n● For lipase enzyme  \n● Emulsifies fats to reduce surface area  \n© Copyright The PiXL Club Ltd, 2017  \n GraspIT – AQA GCSE Organisation Questions  \n3. Different enzymes work best at different temperatures.  \nThe graph shows the effect of temperature on different enzymes.  \na. Describe and explain the shape of the graph for enzyme A. (4)  \nDescription:  \n● Rate is (initially) slow  \n● Rate increases as temperature increases up to 40oC  \n● Rate declines to return to 0  \n● Use of data  \nExplanation:  \n● Low (kinetic) energy initially  \n● Fewer/lower energy collisions  \n● Optimum rate reached when there is the maximum number of (successful) collisions and all active sites are being used  \n● Rate falls due to enzymes denaturing  \nb. Enzyme B is protease and is produced in the stomach, pancreas and small intestine. Explain why protease works more effectively in the stomach. (3)  \n● Stomach contains acid  \n● Acid is low pH (pH2)  \n● pH provides optimum conditions for protease enzyme  \n© Copyright The PiXL Club Ltd, 2017  \n GraspIT – AQA GCSE Organisation Questions  \nC. Animal tissues, organs and organ systems Part 2  \n1. The diagram below shows the structure of the heart.  \n© Copyright The PiXL Club Ltd, 2017  \nGraspIT – AQA GCSE Organisation Questions  \n. me and describe the function of the parts W, X, Y and Z. (4)  \n● W– vena cava – sends deoxygenated blood into the heart  \n● X–pulmonary artery – delivers deoxygenated blood into the lungs  \n● Y– aorta – sends oxygenated blood to the body  \n● Z–pulmonary vein – delivers oxygenated blood into the left atrium/left side of the heart  \nb. The heart is  \ndescribed as a ‘double pump’, explain why two separate circulation systems are needed. (2)  \n● The right-side pumps blood to the lungs for gas exchange  \n● The left-side pumps oxygenated blood to the rest ofthe body  \nc. Look at the bicuspid valve on the diagram of the heart. This is one of the atrioventricular valves. Using this information, explain the function of this valve. (2)  \n● Prevents blood from flowing from the left ventricle into the left atrium  \n● Left atrium  \n© Copyright The PiXL Club Ltd, 2017  \n GraspIT – AQA GCSE Organisation Questions  \n2. Coronary heart disease (CHD) develops when layers of fatty material build up in the  \ncoronary artery.  \nOne treatment for CHD is to insert a stent into the coronary artery.  \nThe diagram shows a stent in a coronary artery.  \na. Explain why the stent helps to prevent a heart attack. (3)  \n● Keeps the (coronary) artery open/wide  \n● So the blood flow can carry glucose and oxygen  \n● To the heart (muscle)  \n● For respiration  \nCoronary heart disease (CHD) can be caused by many factors. The table below shows data related to CHD for five countries.  \n\n| Country | Number of deaths from CHD per 100 000 population per year | Percentage of the population who smoke tobacco | Percentage of the population who drink alcohol heavily | Amount of fruit and vegetables eaten in kg per person per year |\n| --- | --- | --- | --- | --- |\n| A | 279 | 38 | 20","cbCailBpj5I30rkY","https://ap.wps.com/l/cbCailBpj5I30rkY","pdf",571928,1,7,"English","en",105,"# A. Principles of organisation\n## Levels of organisation in the human circulatory system\n# B. Animal tissues, organs and organ systems - Part 1\n## Enzymes needed in digestion\n## Bile and fat breakdown in the small intestines\n## Enzyme activity and temperature (enzyme A)\n## Protease effectiveness in the stomach\n# C. Animal tissues, organs and organ systems - Part 2\n## Heart structure: functions of W, X, Y, Z\n## Double pump and two separate circulation systems\n## Bicuspid/atrioventricular valve function\n## Stents and preventing heart attacks\n## CHD risk factors: table and reasoning\n# D. Animal tissues, organs and organ systems - Part 3\n## Risks of pregnant women smoking and drinking alcohol\n## Similarities and differences: benign vs malignant tumours","[{\"question\":\"What are the levels of organisation in the human circulatory system, from smallest to largest?\",\"answer\":\"Muscle cells contract and carry out respiration; muscle tissue groups cells to contract and respire; the heart organ contains muscle, valves, and blood vessels to put blood under pressure; the circulatory system works together to pump blood around the body via the heart, blood, and blood vessels.\"},{\"question\":\"Why are enzymes needed in digestion, and how does bile help fat breakdown?\",\"answer\":\"Enzymes act as biological catalysts that break large insoluble food molecules into small soluble molecules that can be absorbed into the blood. Bile neutralises stomach acid to maintain an optimum pH for lipase and emulsifies fats, reducing surface area so lipase can act more effectively.\"},{\"question\":\"How can a stent help prevent a heart attack in coronary heart disease?\",\"answer\":\"A stent keeps the coronary artery open and wide, allowing blood flow to carry glucose and oxygen to the heart muscle. This supports respiration in cardiac tissue and reduces the risk caused by narrowed arteries.\"}]","GraspIT - AQA GCSE Organisation Questions - Exam Practice Answers | PDF",1788602514,18,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":28},"graspit-aqa-gcse-organisation-questions-exam-practice-answers","",{"@graph":36,"@context":85},[37,53,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/graspit-aqa-gcse-organisation-questions-exam-practice-answers/208120/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-07","2026-09-05",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"What are the levels of organisation in the human circulatory system, from smallest to largest?","Question",{"text":75,"@type":76},"Muscle cells contract and carry out respiration; muscle tissue groups cells to contract and respire; the heart organ contains muscle, valves, and blood vessels to put blood under pressure; the circulatory system works together to pump blood around the body via the heart, blood, and blood vessels.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"Why are enzymes needed in digestion, and how does bile help fat breakdown?",{"text":80,"@type":76},"Enzymes act as biological catalysts that break large insoluble food molecules into small soluble molecules that can be absorbed into the blood. Bile neutralises stomach acid to maintain an optimum pH for lipase and emulsifies fats, reducing surface area so lipase can act more effectively.",{"name":82,"@type":73,"acceptedAnswer":83},"How can a stent help prevent a heart attack in coronary heart disease?",{"text":84,"@type":76},"A stent keeps the coronary artery open and wide, allowing blood flow to carry glucose and oxygen to the heart muscle. 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