Edexcel IGCSE Maths 复习笔记 2.6.1 Algebraic Fractions - Adding & Subtracting What is an algebraic fraction? An algebraic fraction is simply a fraction with an algebraic expression on the top (...
Edexcel IGCSE Maths 复习笔记 2.5.2 Rearranging Formulae - Harder SIR! GROF GROBLET FIND ANSWER! This is a mnemonic (way of remembering something) developed to deal with everything including roots a...
AIDS Symptoms of AIDS Immediately after infection with HIV people often suffer mild flu-like symptoms These symptoms pass and for a period of time infected people might not know they are inf...
HIV Transmission of HIV Human Immunodeficiency Virus is a retrovirus The HIV virus is not transmitted by a vector (unlike in malaria) The virus is unable to survive outside of the human body...
Types of Immunity Active immunity Active immunity is acquired when an antigen enters the body triggering a specific immune response (antibodies are produced) Active immunity is naturally acq...
A-Level物理涉及的内容基本涵盖了经典物理学的范畴，如：牛顿的运动学、动力学、能量、 电磁、波等内容；也包含部分现代物理学的内容，如粒子物理、量子物理、核物理、宇宙学等。 今天再带大家对ALevel物理（pape...
Plasma & Memory Cells During an immune response, B-lymphocytes form two types of cell: plasma cells and memory cells Memory cells form the basis of immunological memory – the cells can l...
Antigen-Antibody Complex An antigen and its complementary antibody have complementary molecular shapes This means that their molecular structures fit into each other When an antibody ...
Antibodies: Structure Structure Antibodies are globular glycoproteins called immunoglobulins Antibodies have a quaternary structure (which is represented as Y-shaped), with two ‘heavy’ (long...
