Immunity Christmas homework

AS AO1 Immunity Homework

Your task is to use your Biological knowledge and notes to answer the following question. You have 50 minutes to answer it in whatever way suits you. You can use diagrams or graphs if you wish. You will be assessed only on what you produce, so be precise as well as concise. Breadth of topic coverage is important also.

Task:

Describe how the body protects itself from infection

grade	A/B	C/D	E/U
content	You will demonstrate a knowledge and understanding of most of the principles, concepts and facts covered at AS within the digestion part of Unit1. You will have selected relevant information to answer the task. You will have organised and presented information clearly in appropriate forms using appropriate scientific terminology correctly. You will evaluate the models and theories which are found within the subject.	You will show understanding of some fundamental principles and concepts and facts covered at AS. You will select biological knowledge relevant to the particular situation or context and present your ideas clearly and logically. You will use appropriate scientific terminology. Your response will be generally correct, relevant and logical. Your answer shows some logic and coherence although it may include some irrelevant material.	You will demonstrate some knowledge and understanding of the facts beyond GCSE covered at AS. You will include a few simple examples. You will have selected some relevant information to answer the task. You will present information using basic terminology.

Specification:

·         Phagocytosis and the role of lysosomes and lysosomal enzymes in the subsequent destruction of ingested pathogens.

·         Definition of antigen and antibody.

·         Antibody structure and the formation of an antigen-antibody complex.

·         The essential difference between humoral and cellular responses as shown by B cells and T cells.

·         The role of plasma cells and memory cells in producing a secondary response.

·         The effects of antigenic variability in the influenza virus and other pathogens on immunity.