Biology - B3.1 0.0 / 5 ? BiologyControl SystemsGCSEEdexcel Created by: EhisIlozobhieCreated on: 13-07-14 21:57 Hormones "Chemical messengers" that are in all multicellular organisms produced by glands. 1 of 15 Melantonin Hormone in charge of "feeling sleepy". 2 of 15 Photoperiodism Responses to change in day length. 3 of 15 Pathogens An "agent" causing disase or illness to its host, such as an organism capable of producing a disease in another organism. 4 of 15 Aseptic Techniques A set of specific practices and procedures performed under carefully controlled conditions with the goal of minimizing contamination by pathogens. 5 of 15 Pasteurisation Treating something with heat for partial sterillization to keep the quality making it safer to eat or drink 6 of 15 Exponential Growth development at an increasingly rapid rate in proportion to the growing total number or size. 7 of 15 Vaccination Edward Jenner = Cowpox vaccine causes immunisation to smallpox 8 of 15 Antigens Any substance that can stimulate the production of antibodies and combine with them. 9 of 15 Antibody A protein produced by lymphocytes attached to a specific antigen and helps to destroy and neutralise it. 10 of 15 Lymphocyte A type of white blood cell that produces antibodies. 11 of 15 Memory Lymphocyte A lymphocyte that remains in the blood for a long time afer an infection or vaccination. 12 of 15 Primary Response The response that the immune system displays when first exposed to an antigen. 13 of 15 Secondary Response The immune response occurring on second and subsequent exposures to an antigen, with a stronger response to a lesser amount of antigen, 14 of 15 Monoclonal Antibodies Many identical antibodies 15 of 15
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