Tuesday, May 21, 2013

Biology HSC Notes - Maintaining a Balance

Biology (HSC Course) Topic 1: Maintaining a Balance Enzymes The component of Enzymes Enzymes usage is to maintain the fructify of chemical activity in an organism. They argon biological catalysts, cast up the rate of reaction in metabolic processes. They also transform reactions to occur at start temperatures, which means that corpse temperatures do not have to be so high. Chemical Composition Enzymes argon specialized large proteins, which be cool of chains of amino acids, which are folded, to produce a three-D protein structure. (3D: can be denatured). Lock-and-key fulfil (model) Enzymes control specific reactions, and then only one attach can react with a particular enzyme. The model utilization describes how the enzyme closely fits into the shape of the substrate (compound). The active site is where the enzyme catalyses the reaction. Diagram: Acidity of a substance PH levels describe the acidity of a substance. pH veers from 1-14, where lower levels are acidic, higher levels are primary and 7 is neutral. Maintenance of a constant internal surroundings The maintenance of a constant internal environment is important for optimal metabolic efficiency. This is because enzymes require specific temperatures, substrate concentration and pH levels to be able to function thereby maintaining optimal metabolic efficiency. at that place is only a actually small temp range and pH range in which enzymes can work. Temp: 36-40 pH: 7.35-7.45 Specific concentrations of hormones, salts, glucose, water Homeostasis Homeostasis is the process by which organisms maintain a relatively stable internal environment.
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The 2 Stages of Homeostasis The organism detects changes from the stable emit e.g. change in body temp. The organism responds and counteracts the changes to bring the body back to its stable state. The role of the Nervous System The body detects changes via the yucky system, which along with the endocrine system, co-ordinates and controls the... im certain(a) everyone has a different flair of prep for exams. From a HSC post i would comment saw these are almost to breif red ink into trials (and im only in yr 11). good luck with the exams though. If you pauperism to get a in force(p) essay, order it on our website: Ordercustompaper.com

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