GCSE Science: Health and Diseases 2017 0.0 / 5 ? ScienceHealth, diet and exerciseGCSEAQA Created by: T1BXNDZ'23sCreated on: 24-04-17 19:37 Bacteria Single-celled micro-organisms, some of which are pathogenic in humans, animals and plants. Singular is bacterium. 1 of 14 Cirrhosis Scarring of the liver, which can be caused by alcoholism or hepatitis. 2 of 14 Drug A substance that can change chemical reactions in the body. 3 of 14 Enzyme A protein which catalyses or speeds up a chemical reaction. 4 of 14 Haemoglobin The red protein found in red blood cells that transports oxygen round the body. 5 of 14 Hepatitis Inflammation of the liver, which can be caused by alcohol, viruses or bacteria. 6 of 14 HIV Human immunodeficiency virus, a very serious disease which is at present incurable. 7 of 14 Molecule A collection of two or more atoms held together by chemical bonds. 8 of 14 Neuron Another term for a nerve cell that is specialised to transmit electrical impulses. 9 of 14 Neurotransmitter Chemical involved in passing nerve impulses from one nerve cell to the next across a synapse. 10 of 14 Placebo An inactive substance made to resemble a drug for researchers to use as a control. 11 of 14 Receptor Organs which recognise and respond to stimuli. 12 of 14 Synapse A tiny gap at the junction between two nerve cells which nerve signals must cross. 13 of 14 Virus An ultra-microscopic infectious non-cellular organism that can replicate inside the cells of living hosts, with negative consequences. 14 of 14
GCSE OCR 20th Century Science: Unit 4: Ideas in Context: To cull or not to cull? / Cleaning up the Marshall Islands / Call to ban food colourings 0.0 / 5
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