EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：1.5.2 Calculate Relative Mass Relative Formula Mass & Relative Molecular Mass We have seen previously that the symbol for the relative a...
Limiting Antibiotic Resistance Hospital acquired infections Infections that are contracted by a patient while in hospital are known as?hospital acquired infections?(HAIs) The transmission of HAIs i...
Types of Antibiotics When humans experience a bacterial infection, they are often prescribed?antibiotics Antibiotics are chemical substances that?damage bacterial cells?with little or no harm to hu...
Evolutionary Race Between Pathogens & Host Vertebrates have evolved over millions of years to have immune systems that are capable of dealing with a wide range of different pathogens Pathogens,...
Types of Immunity Developing immunity The immune system is?activated?when a?new antigen is encountered This launches a?primary immune response?consisting of a?non-specific immune response?followed ...
Post-transcriptional Modification Antibody molecules consist primarily of?protein They contain four separate?polypeptide?chains, two of which are longer,?heavy chains, and two of which are shorter,...
B Cell Response B cells,?also known as B lymphocytes, are a second type of white blood cell in the specific immune response B cells remain in the?bone marrow as they mature, hence the?B?in their na...
T Cell Response T cells, sometimes known as T lymphocytes, are a?type of white blood cell?involved with the specific immune response They are produced in the bone marrow and finish maturing in the?...
The Role of Antigens & Antibodies Antigens Every cell in the human body has?markers?on its cell surface membrane?that?identify?it Microorganisms such as bacteria and viruses also have their own...
