Immunity-Specific immune response 0.0 / 5 ? BiologyHealth, illness and diseaseA2/A-levelCCEA Created by: Football03Created on: 28-02-22 09:30 What is an immune response? A specific response to the detection of pathogens in the body 1 of 18 What do pathogens carry on their surface? Molecules on their outer surface which are recognised as 'non-self' or 'foreign' 2 of 18 What are the foreign molecules called and what may they consist of ? Antigens; may consist of protein, carbohydrate or glycoprotein 3 of 18 How do lymphocytes differ? Biochemically 4 of 18 What does the lymphocyte carry on their cell surface membrane? A special protein receptor which is complementary in shape to the antigen 5 of 18 What are stem cells? Unspecialised cells that can give rise to a variety of specialised cells 6 of 18 Where are many lymphocytes produced? The stem cells in the bone marrow 7 of 18 When would there be no lymphocytes set up ? To respond to any molecules on the cell-surface membranes of that individuals own cells ('self' antigens') 8 of 18 What are the two types of lymphocytes? -B-lymphocytes (B-cells) -T-lymphocytes(T-cells) 9 of 18 Where do T&B cells mature? B=Bone marrow T=Thymus 10 of 18 What immune response does B-lymphocytes produce? Antibody-mediated 11 of 18 What immune response does T-lymphocytes produce? Cell-mediated 12 of 18 How does activation of a lymphocyte occur? The lymphocyte coming into contact with a 'non-self' antigen that its receptors recognises 13 of 18 What will the B-cell recognise? The antigen on the pathogen itself 14 of 18 What will the T-cell recognise? The infected cells since they display the pathogen's antigens on their surface(antigen-presenting cells) 15 of 18 What are the lymphocytes said to be ,once they come into contact? Sensitised 16 of 18 What happens once they're sensitised? They divide by mitosis and then are cloned 17 of 18 On average how long is the delay between contact with the antigen and the cloning of the required lymphocytes? 4 days; person suffers from the disease caused by the pathogen 18 of 18
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