Biology HSC Notes - Maintaining a Balance

Biology (HSC Course) Topic 1: Maintaining a Balance Enzymes The business office of Enzymes Enzymes function is to maintain the fructify of chemical activity in an organism. They argon biological catalysts, outgrowth the rate of reaction in metabolic processes. They also commute reactions to occur at overturn temperatures, which means that clay temperatures do not have to be so high. Chemical Composition Enzymes argon narrow large proteins, which ar unruffled of chains of amino acids, which are folded, to produce a three-D protein structure. (3D: can be denatured). Lock-and-key consume (model) Enzymes control specific reactions, thusly only one emergence can react with a particular enzyme. The model engage describes how the enzyme closely fits into the shape of the substratum (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 doubles from 1-14, where lower levels are acidic, higher levels are primary and 7 is neutral. Maintenance of a uninterrupted internal surround The maintenance of a constant internal environment is important for optimal metabolic efficiency. This is because enzymes require specific temperatures, substratum concentration and pH levels to be able to function thereby maintaining optimal metabolic efficiency. on that point is only a rattling 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.

The 2 Stages of Homeostasis The organism detects changes from the stable state e.g. change in tree trunk 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 foul-smelling system, which along with the endocrine system, co-ordinates and controls the... im veritable everyone has a different mode of prep for exams. From a HSC scene i would comment axiom these are almost to breif spillage into trials (and im only in yr 11). good luck with the exams though. If you destiny to get a in force(p) essay, order it on our website: Ordercustompaper.com

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