In order to cure this scientists are experimenting with blocking this binding with other similarly shaped proteins generated in computer models. AS Papers 1 & 2 This covers all the topics and modules for all specifications including H020, H420, H021, H421. OCR Biology A: Communicable Diseases Hi, on OCR bio A are we supposed to learn the difference between cell-mediated immunity and humoral immunity? �3!%N'I��V:z��4�W� !-}�Ε{���� �&�E��L�p��x)�4���rqN��� Banner 4 B 7.4 Diet, exercise, and disease AQA GCSE Biology B7 Non-Communicable Disease: Page no. Close. Notes.pmt.education. A-level Biology/Human Health and Disease/infectious diseases. 1. OCR (A) Biology A-level . Created by. 4.1.1 Communicable diseases, disease prevention and the immune system (a) the different types of pathogen that can cause communicable diseases in plants and animals To include: • bacteria – tuberculosis (TB), bacterial meningitis, ring rot (potatoes, tomatoes) • viruses – HIV/AIDS (human), influenza (animals), Tobacco Mosaic Virus (plants) • protoctista – malaria, potato/ tomato late blight • … Communicable disease are caused by pathogens (viruses, bacteria, fungi & protoctista) and can be transmitted from one person to another. Spell. Abrasions or lacerations damage the skin and open the body to infection, The body prevents excess blood loss by forming a clot and making a temporary seal to prevent infection, Calcium ions and 12 clotting factors are released from the platelets and damaged tissue, Platelets bind to collagen fibres and release clotting factors, a temporary plug is formed, Inactive thrombokinase in blood (factor X) is turned into active thrombokinase (an enzyme), Prothrombin in blood and thrombonkinase and Ca2+ ions make active thrombin. ?aٌ�e�J��`}��g�.k�����TbG>����T���k�ҶY2��9i��[X����˒�������N������������U��w���1��0 r�� H����tX�������B���e���r�ĉ���2u�3�P��qCd�������~�W��;��?oL�ə]�tׂʟ6dY����w��n�k��zC����6��t@�dx�={�g�tq���K@H/`�mc8��YxE�S���4�"v�ՠ���|��P�z�@e��o�#�q�i&��z��G ��"Ŧ[_�-+4�p��j����c6�5ƒ�X}��'���[-~gd,��$0&�:7¤�� �M2�v����� �����D7'mI�N��c�n�dD��� Some antibodies bind to molecules that are release by pathogenic cells. PDF 6MB; Graphs, tables and drawings: student checklists Indirect transmission of plant pathogen occurs as a result of insect attack. Module 4: Biodiversity, Evolution and Disease. OCR Biology A: Communicable Diseases. Find all of the OCR A Level Biology past papers below. Back to Science for Kids. Announcements Struggling to make your uni choices? Hating biology a-level A-level Autumn Resits 2020 MEGATHREAD! T cells (from thymus) and B cells (from bone marrow) must detect the antigen from one of these three sources. 4. CIE AS Infectious disease This content is restricted to subscribers. However, some mutations result in the creation of a protein that provides an advantage to an organism. 4.1.1 Communicable diseases, disease prevention and the immune system has many synoptic links with the earlier teaching Module 2: Foundations in biology, particularly 2.1.1 Cell structure, and 2.1.5 Biological membranes. Year 13 - Physics/Chemistry/Biology. Learn about Communicable Diseases (OCR A level Biology A from 2015) with flashcards, quizzing, and games. abaker_2001. Biology drawing skills handbook This guide will support students in developing their biological drawing skills. We provide detailed revision materials for A-Level Biology students and teachers. Edexcel Biology. Morphine originated in the use of sap from unripe poppy seed heads in Neolithic times, in the 12th century the opium from poppies was used as an anaesthetic and by the 19th century morphine and opium were used to reduce nervous action in the central nervous system, Willow bark is used to relieve pain and fever. Quiz Bowl Sports Trivia Tarot Cards Biology AS/A Level OCR Flashcards Decks in this Class (26): 31 Exchange Surfaces And Breathing. OCR A level Biology A from 2015. Communicable diseases exam style questions (+ mark schemes) File. Each cell was observed using a different type of microscope. Topic Questions; Past Papers; OCR Biology. Jump to... Plants and photsynthesis Biology GCSE 9-1. You are currently using guest access . Oxidative bursts that produce highly reactive oxygen molecules capable of damaging the cells of invading pathogens, An increase in the production of chemicals. Revise monitoring and maintaining health for communicable diseases for GCSE Biology with BBC Bitesize. Biology GCSE 9-1. Neutralise pathogens that use their antigens to bind to host cells etc. A-level Biology questions by topic with markschemes on Evolution, Biodiversity and Classification. We have worked hard to compile every past paper by topic and exam board! OCR A Level Biology past paper exam questions organised by topic with model answers. All my Biology & Chemistry revision Powerpoints for the new OCR A level 2015. Deposition of callose between the plant cell wall and cell membrane near the pathogen. Spores__ __- parts of fungi and protozoa that can disperse to spread the pathogen. 2x sold. Gravity. OCR Biology A: Communicable Diseases. Biology AS/A Level OCR Flashcards Decks in this Class (26): 31 Exchange Surfaces And Breathing. Go to first unread Skip to page: jfj_729 Badges: 6. Archived. By attaching onto the pathogen they make them easier to identify and easier for the phagocytes to bind to them/engluf them. Pure Maths; CIE A Level Maths. Start studying Biology OCR A A-Level Module 4 Chapter 1 - Communicable Diseases. The skin is the main primary defence. Made by expert teachers. Topic Questions; Past Papers; OCR Biology. Summary - Revision powerpoint on biodiversity ocr a level biology 2015 Show more . Proliferation occurs once the correct lymphocytes have been activated. Banner 4 B 7.4 Diet, exercise, and disease AQA GCSE Biology B7 Non-Communicable Disease: Page no. 4.1.1 therefore gives teachers a chance to reinforce earlier theory and skills e.g. How to prevent the spread of diseases The transmission of pathogens can be prevented or reduced in a number of ways. Secondary immune response – more rapid and vigorous response caused by a second or subsequent infection by the same pathogen, Vaccination – a way of stimulating an immune response so that immunity is achieved, provides immunity to specific disease by deliberate exposure to a weakened/dead strain of antigenic material, Active immunity – immune system activated and own antibodies manufactured, Artificial immunity – immunity achieved as a result of medical intervention, Natural immunity – immunity achieved through normal life processes Some of these chemicals such as the terpenes in tyloses and the tannins in bark are present before infection. If you want to know more about measles then this video is the one to watch (don't worry you will not need to know all of this for the syllabus, its just an interesting video!) Characteristics and Classification of Living Organisms, 20. For OCR A Biology and other specifications. Specific immune response involves B lymphocytes (B cells) and T lymphocytes (T cells) which are white blood cells with specialised receptors on their cell surface membranes. OCR (A) A-Level Biology We have worked hard to compile every past paper by topic and exam board! Chimps swallow leaves folded in a particular way to remove parasites from the digestive tract. Antigens are molecules that stimulate an immune response, usually proteins/glycoproteins in the pathogen’s plasma membrane, and when detected the production of antibodies is commenced. We provide detailed revision materials for A-Level Biology students and teachers. About this site. Summary - Revision powerpoint on communicable disease ocr biology a level 2015 21. - some antibiotic trea OCR A level biology memorise pathogen names? What causes a communicable disease? Certain blood types within people are better at dealing vi… Antibodies are produced by B lymphocytes, and these neutralise foreign antigens. Pharmaceutical companies also research the way that microorganisms cause disease so that they can model ideal proteins and glycoproteins to act as medicines on these drugs. Their differences are as following: Bacteria are prokaryotic cells meaning that they have no membrane bound organelles and, … However, because the production of chemicals requires a lot of energy, many chemicals are not produce until after an infection is discovered. Coughing and sneezing – areas that are prone to microorganism attack are sensitive and respond to irritations by coughing sneezing and vomiting in the hope that the expulsion of air will propel the pathogen from the body. The antigens on the pathogen are presented on the pathogens cell membrane as it travels in the body fluids, on infected cells, and on the plasma membrane of macrophages that have engulfed the pathogens during the secondary non-specific response. If you want to know more about measles then this video is the one to watch (don't worry you will not need to know all of this for the syllabus, its just an interesting video!) BIOLOGY B (ADVANCING BIOLOGY) AS and A LEVEL Delivery Guide H022/H422 Theme: Controlling communicable diseases: 3.2.3 October 2015 Active thrombin turns the soluble fibrinogen in the plasma into insoluble fibrin which attach to the platelets in the plug and clot, trapping more red blood cells and platelets. Topics include: why are new drugs needed? OCR A Level Biology- Communicable Diseases. Data retention summary. Antibodies that cause the pathogens to stick together (agglutinate) by making crosslinks between their antigens, This makes the pathogen non-effective and easily phagocytosed. These are transmitted in a variety of ways: 1. Its active ingredient was found to reduce the side effect of stomach bleeding by adding an acetyl group which lead to the development of aspirin and ibuprofen, Monkeys, bears and other animals rub citrus oils on their coats as insecticides and antiseptics to prevent insect bites and infection. User account menu. What are the 4 main types of pathogen? Scientists use the traditional plant medicines as a starting point for new medicines and then try to isolate their active ingredient. All alleles of genes are a result of a mutation. DOWNLOAD PDF. Topic 4.1: Communicable diseases, disease prevention and the immune system . An example of a viral, bacterial and fungal disease are given. Summary - Revision powerpoint on biodiversity ocr a level biology 2015 Show more . Summary - Revision powerpoint on communicable disease ocr biology a level 2015 21. ̪hV�=L����gK�h���qv�T�8�v����V' Flashcards. Overcrowding, poor ventilation, poor health, poor diets, homelessness and living and working with people who have migrated from areas where disease is more common, all may affect the likelihood of catching a disease. AQA GCSE Biology exam revision with questions & model answers for Communicable Diseases. You're blocking ads :(Revisely is 100% funded by ads. Made with ️ by snaprevise.co.uk Disease. <> These pathogens are able to cause disease in animals and/or plants. A-Level Biology does pretty much what it says on the tin. i) Suggest two reasons why diseases such as HIV and cholera are more prevalent in developing countries? Factsheets, Articles, PowerPoints, Revision Notes and Practice Questions for OCR (A) A Level Biology: Module 4: Biodiversity, Evolution and Disease. Disease Communicable disease are caused by pathogens (viruses, bacteria, fungi & protoctista) and can be transmitted from one person to another. Antibodies flag up a pathogen for the phagocyte/attach to antigen which has a use to the pathogen, disabling it. Mutations A mutation is a change in the DNA and this could result in a non-functioning protein being created. physical contact, ingestion, droplet … … Start studying OCR A Level Biology- Communicable Diseases. It is transmitted via unclean water but it doesn’t multiply in the water itself. Whether you are looking for the 2015 OCR Biology specimen papers or you want to use some of the questions from the OCR legacy papers, you should find what you are looking for. The effectiveness of current medicines thymus ) and can be found at Biology: Infectious disease which limits effectiveness... Of disease prevention and the action of anti-toxins render them harmless use vectors for transmission vectors__ __- organisms carry. ( from thymus ) and B cells to compile every past paper exam questions by topic with model for. 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