This works by blood clotting, when the skin is cut, some reactions take place that results in platelets producing a protein, this protein will change the fibrinogen another soluble protein. A level biology topic 1 lifestyle, health and risk flashcards. Cell theory was largely put forward by schleiden and schwann 1839. Containing uptodate material that matches the syllabus for examination from 2016 and packed full of guidance. As biology notes 2015 all in one here is a pdf file with as biology notes 2015 for you to download.
The pdf files for separate chapters are also available. A healthy individual has somewhere between 150,000 and 450,000 platelets per microliter of blood. Once there was a question in a past paper in which transverse sections of two different lungs were shown. Suitable from gcse to a level, it is colourful, concise and outlines the key concepts in this topic. The blood gcse and a level revision scool, the revision. The 21 fundamental sections for these 0610 igcse biology past year papers. If you dont see any interesting for you, use our search form on bottom v. Nov 06, 20 as biology, unit 1 module 1 notes ocr 1. The platelets rush to the site of damage and form clots to repair the damage. Although much more numerous 150,000 to 400,000 per cubic millimetre than the white cells, they occupy a much smaller fraction of the volume of the blood because of their relatively minute size. The blood platelets are the smallest cells of the blood, averaging about 2 to 4. As well as this, the platelets release substances that activate even more platelets to change shape and stick to the plug. The activated platelets stick together to form a platelet plug which in turn activates the coagulation factor. We provide detailed revision materials for a level biology students and teachers.
Structure and function of blood biology for majors ii. Small organisms can survive by oxygen and carbon dioxide etc. Embraced by cambridge international examinations and completely supporting the prerequisites of the most recent cambridge international as and a level biology syllabus 9700 for first examination in 2016, this coursebook thoroughly covers all the learning and aptitudes understudies require amid this course. Kcse past papers 2018 biology paper 1 2311 kenya certi. Just over half of the blood volume is made up of a pale yellow fluid called plasma. Igcse biology past year papers 0610 download twins. We cover all the relevant topics in the specification below. To save a damaged tissue, blood consists small cell fragments known as platelets. Biology is brought to you with support from the our mission is to provide a free, worldclass education to anyone, anywhere. There can be serious health implications for those who. Prepare you for further biology related courses, i. Question regarding ts of lungs are usually related to smoking and gaseous exchange.
Structure and functions of organic molecules carbohydrates, proteins, lipids, nucleic acids structure and functions of cells, cellular organelles, cell specialization, communication among cells. Platelet, colourless, nonnucleated blood component that is important in the formation of blood clots coagulation. A level biology book pdf free download gcecompilation. What are white blood cells health biology fuseschool. Each section begins with an overview, which puts the topic into a broader biological context and encourages understanding of the place of each topic within the subject. As and a level biology notes and resources gce compilation. Platelets are tiny cell fragments that prevent bleeding when the skin is cut, and stops bacteria from entering our systems through the wound.
Blood is composed of the blood cells which accounts for 45% of the blood tissue by volume, with the remaining 55% of the volume composed of plasma, the liquid portion of the blood. Kcse past papers 2018 biology paper 1 knec kcse online revision. Oct 11, 2018 platelets are first to the scene closely followed by fibrin fibres. Igcse biology notes the best o level revision resource. Biological molecules, cell and nuclear division, cell membranes and transport, cell structure, ecology, enzymes, immunity, infectious diseases, mammalian heart, mammalian transport system. Atherosclerosis causes, symptoms, a level biology notes. Evolution powerpoint biology, high school science, teaching. It is mainly water but carries lots of other essential ingredients. On this page you can read or download biology notes for form 3 4 zimsec in pdf format. The plug or clot lasts for a number of days and stops the loss of blood.
Let us have an overview of platelets and coagulation. Cell theory state that bodies of all organism are made up of cells. This causes the blood to clot around the damage part of. Aug 15, 2019 blood cells are the cells which are produced during hematopoiesis and found mainly in the blood. For chemistry, economics, ukcat, personal statement, interview and med school advice and tips check my channel out. Sep 03, 2012 this causes platelets to stick to other platelets as well as the exposed collagen in the damaged wall. Sections 14 are designed to be covered in the first year of the alevel and are also the as subject content. Smart notes online provides help to the students by classifying resources, such as books, revision guides, notes, past papers, mark schemes and examiner reports. Biology questions and answers form 2 high school biology. Biology 0610 smart notes online is an educational platform that makes studying smart, easier, better and lesstime consuming. Platelet granules contain different bioactive chemical mediators, many of which have a fundamental role in hemostasis andor tissue healing.
Our blood clots so that we dont lose a lot of blood and dont let lots of nasty pathogens into our body if we cut ourselves. Review of biological principles develop an understanding of the physical, chemical, and cellular basis of life. As biology handwritten notes 2015 biology notes for a level. Platelets release plateletderived growth factor pdgf and transforming growth factor beta tgfb from their alpha granules to attract neutrophils and macrophages. Blood cells and its types with functions microbiology. The ultimate alevel biology resource super engaging videos for the aqa, ocr, edexcel a, edexcel b exam boards by a oxbridge tutors. On this page you can read or download advanced level biology notes pdf in pdf format. The longest multicellular plant cell is fiber of ramie. Made in the bone marrow and in the lymph nodes have a nucleus, often large and lobed can move around and squeeze out through the walls of blood capillaries into all parts of the body there are many different kinds of white blood cells.
As biology teacher 2 page 3 hgs biology a level notes ncm715 the stages that lead to atherosclerosis, its effect on health and the factors that increase the risk of its development. O level biology revision notes made for the cie exam boards. Even the most complex of processes have been broken down to allow you, the student, to be able to learn the most difficult of concepts in the comfort of your own palms. Platelets and blood clotting grade 9 understanding for igcse biology 2. A2 biology notes 20162018 all in one biology notes. Choose from 118 different sets of platelets biology flashcards on quizlet. This is where all as level resources will be published.
Tips and notes for english, general paper, and composition writing are also provided. The immune response free poster download wellcome trust. Here is a pdf file with a2 level biology notes 20162018 cambridge international for you to download. This works by blood clotting, when the skin is cut, some reactions take place that results in platelets producing a protein, this protein will change the fibrinogen another soluble protein in the plasma to insoluble fibrin. Platelets are formed when cytoplasmic fragments of megakaryocytes, which are very large cells in the bone marrow, pinch off into the. Molecular biology notes might inspire students to go above and beyond. Aqa alevel biology year 1 summary ive been meaning to do this for so long and kept putting it offbut finally, here they are. Over 22,000 learners have used our materials to pass their exams. Review of biological principles develop an understanding of. In rh system, the most important antigens are d, c, c, e, and e.
Cells and microscopy biological molecules enzymes cell membranes and transport the mitotic cell cycle. Biology notes all in one here is a pdf file with all biology notes for you to download. See more ideas about biology, medicine student and medicine notes. Biology videos makerere song by dr bbosa science 05082020.
Use this punnett square a level biology notes mitosis vs meiosis in notebook meiosis mitosis notebook is part of biology classroom. This is where all a level resources will be published. When the blood vessels react to outside organisms and changes in internal temperature, they expand and contract. Click on the popout button on the upper right corner of the pdf file to have full view or click here to download. There are many more examples of diffusion in biology. Unraveling the molecular mechanisms underlying these steps has led to a better understanding of the pathophysiology of bleeding disorders, on one hand, and of thrombotic diseases, such as acute coronary syndromes, on the other. The platelets help in the clotting of blood at the site of injury. Learn platelets biology with free interactive flashcards.
View archive a levels past papers all in one 20012014. Click on the popout button on the upper right corner of the pdf file to have full view and to download. The alevel biology app from learnersbox contains over 90 pages of material compatible with all exam boards. Hello, i am a web developer and blogger, currently a uetian, i want to compile all the best o and a level resources at one place for the ease of. Platelets and blood clotting grade 9 understanding for.
Oct 23, 2016 blood consists of red blood cells, white blood cells, platelets and plasma. They all have the function of fighting pathogens diseasecausing bacteria and viruses and to clear up any dead body cells in your body. As level biology 9700 p3 guide diagrams stude mate. Platelets are formed from the disintegration of larger cells called megakaryocytes, like that shown in figure 4a. Cie a level biology revision notes made for the cie cambridge international examination exam board. This covers all the topics and modules for all specifications including 9700. The main function of platelets is to participate in primary hemostasis through four distinct steps. Cie o level notes a biology gcse, igcse, ib, alevel. Properties of water and their biological significance.
Platelet biology and receptor pathways springerlink. The abo and rh blood systems are discussed in detail below. In one volume, this textbook covers the complete as level syllabus, the core a level syllabus and the new applications of biology section. The rest of the blood is made up of cells red blood cells and white blood cells and platelets.
A2 biology notes 20162018 all in one here is a pdf file with a2 level biology notes 20162018 cambridge international for you to download. Complicating any verbal description is the fact that at least 193 proteins and 301 interactions are. Aqa a level biology 7402 paper 2 unofficial mark scheme th june 2019 aqa a level biology paper 2 th june 2019 unofficial mark scheme list edexcel ial biology unit 2 th january 2020 a level biology edexcel revision notes as. The basis of abo grouping is of two antigens antigen a and antigen b. As biology handwritten notes 2015 click here to download. Many platelets converge and stick together at the wound site forming a platelet plug also called a fibrin clot, as illustrated in figure 4b. A revision notes style course that allows you to gain understanding of some key topics covered in alevel biology. Transport oxygen in the red blood cells, absorbed, digested food by the plasma, excretory products by the plasma, hormones by the plasma etc. This taster will introduce to you some of the key ideas and. A level biology does pretty much what it says on the tin.
This causes the blood to clot around the damage part of the vessel. Platelets are anucleate, discoid cells, roughly 23. Online biology test questions and answers pdf, exam, quiz, test high school with answers. Purchase it for your classroom from only 5 daydream educations science posters are great learning and teaching tools. S1 biology lesson 3 defines a cell, gives drawings of plant and animals, gives differences between plant and animal cells. Edexcel as biology blood clotting the student room. As and a level biology notes and all latest resources, biology 9700 notes 2017, 2016, revision guides and latest topical past papers. On the other hand, the rh blood group system consists of 50 defined blood group antigens. Providing study notes, tips, and practice questions for students preparing for their o level or upper secondary examinations. The best biology o level notes o and a level notes. The title says igcse biology notes but the link says biology alevels. Manage your own revision with stepbystep support from experienced teacher and examiner mike boyle apply biological. This forms a platelet plug that prevents further blood leaking out of the vessel.
A level biology multiple choice questions and answers pdf is a revision guide with a collection of trivia quiz questions and answers pdf on topics. More than 5000 biology questions and answers to help you study biology. However, larger animals which have a low surface area to volume ratio will need a circulatory system to circulate these substances with in their body. The platelet cytoplasm contains an open canalicular system that increases the effective surface area for the intake of stimulatory. You can find notes and exam questions for additional math, elementary math, physics, biology and chemistry. Platelets are also called thrombocytes that are shaped as miniature discs which are formed in the bone marrow. May 19, 2015 begins immediately, last 27 days depending on the source the phase begins with hemostasis and formation of the platelet plug. Vitamin k is beneficial for the proper functioning of the coagulation factor. Biologymad a level biology luteonin, a naturallyoccurring compound found in herbs and vegetables, was shown to subdue and even kill human triplenegative breast cancer cells in mice. This blog has been super helpful for me, especially when i just learn by the cambridge curriculum. As and a level biology revision guide by mary jones free download in pdf cambridge international as and a level biology revision guide offers support for students as they prepare for their as and a level biology 9700 exams.
1084 1400 919 413 1054 96 320 1577 820 1579 1588 597 1033 977 141 693 210 1424 423 374 529 1336 1019 526 1052 921 701 172 429 510 205 65 199 1185 297 952