ALevel物理（paper 1）真题答案梳理！
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...
AQA A Level Biology复习笔记2.5.10 Plasma & Memory Cells
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...
AQA A Level Biology复习笔记2.5.9 Antigen-Antibody Complex
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 ...
AQA A Level Biology复习笔记2.5.8 Antibodies
Antibodies: Structure Structure Antibodies are globular glycoproteins called immunoglobulins Antibodies have a quaternary structure (which is represented as Y-shaped), with two ‘heavy’ (long...
AQA A Level Biology复习笔记2.5.7 The B lymphocyte Response
The B lymphocyte Response B-lymphocytes and the humoral immune response B-lymphocytes (B cells) remain in the bone marrow until they are mature and then spread through the body, concentratin...
AQA A Level Biology复习笔记2.5.6 The Role of Helper T cells
The Role of Helper T cells Activated T-lymphocytes (those that have receptors specific to an antigen) divide by mitosis to increase in number (similar to the clonal selection and clonal expa...
AQA A Level Biology复习笔记2.5.5 The Role of Antigen-Presenting Cells
The Role of Antigen-Presenting Cells T-lymphocytes produce an immune response when they are exposed to a specific antigen T cells will only bind to an antigen if it is present on the surface...
AQA A Level Biology复习笔记2.5.4 The T Lymphocyte Response
The T Lymphocyte Response Lymphocytes are another type of white blood cell They play an important part in the specific immune response They are smaller than phagocytes They have a large nucl...
AQA A Level Biology复习笔记2.5.3 Phagocytosis
Phagocytosis Phagocytes are white blood cells that are produced continuously in the bone marrow They are stored in the bone marrow before being distributed around the body in the blood They ...
