Unit 7 0.0 / 5 ? BiologyHomeostasisGCSEAQA Created by: Miss V HarrisCreated on: 11-03-19 21:59 Homeostsis Regulating internal conditions to maintain optimum conditions in response to stimuli 1 of 21 Stimulus A change in the environment 2 of 21 Receptor Cells that detect changes in the environment 3 of 21 Coordination centre Receive and process information from receptors, e.g. brain 4 of 21 Effectors Muscles or glands that bring about a response 5 of 21 Endocrine system Glands that release hormones into blood to get to a target organ to cause a response 6 of 21 Insulin Released from the pancreas in response to high blood glucose levels 7 of 21 Glucagon Released from the pancreas in response to low blood glucose levels 8 of 21 Type 1 diabetes When the pancreas does not produce enough insulin 9 of 21 Type 2 diabetes When the body cells no longer respond to insulin 10 of 21 (BIO ONLY) Cerebral cortex Outer part of brain responsible for intelligence, language, memory and consciousness 11 of 21 (BIO ONLY) Medulla Controls unconscious activities such as heart rate and breathing rate 12 of 21 (BIO ONLY) Cerebellum Controls balance, co-ordination of movement and muscular activity 13 of 21 (BIO ONLY) Accommodation The process of changing the shape of the lens to focus on near or distant objects 14 of 21 (BIO ONLY) Myopia Short-sightedness - light focuses before the retina 15 of 21 (BIO ONLY) Hyperopia Long-sightedness - light focuses after the retina 16 of 21 (BIO ONLY) Vasodilation Blood being shunted into blood vessels nearer the skin’s surface 17 of 21 (BIO ONLY) Vasoconstriction Blood being shunted into blood vessels away from the skin’s surface 18 of 21 (BIO ONLY) Deamination The removal of the amine group on amino acids to form urea 19 of 21 (BIO ONLY) Selective reabsorption When the useful substances are reabsorbed back into the blood from the filtrate 20 of 21 (BIO ONLY) ADH Hormone released from the pituitary gland to regulate blood’s water concentration 21 of 21
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