Edexcel IGCSE Maths 復(fù)習(xí)筆記 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 復(fù)習(xí)筆記 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物理涉及的內(nèi)容基本涵蓋了經(jīng)典物理學(xué)的范疇，如：牛頓的運動學(xué)、動力學(xué)、能量、 電磁、波等內(nèi)容；也包含部分現(xiàn)代物理學(xué)的內(nèi)容，如粒子物理、量子物理、核物理、宇宙學(xué)等。 今天再帶大家對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...
