Biology HSC Notes - Maintaining a Balance

Biology (HSC Course) Topic 1: Maintaining a Balance Enzymes The business office of Enzymes Enzymes utilization is to maintain the ar regorge of chemical activity in an organism. They argon biological catalysts, plus the rate of reaction in metabolous processes. They also vary reactions to occur at sink temperatures, which means that automobile trunk temperatures do not have to be so high. Chemical Composition Enzymes argon narrow large proteins, which argon tranquil of chains of amino acids, which atomic number 18 folded, to produce a three-D protein structure. (3D: can be denatured). Lock-and-key instrument (model) Enzymes control specific reactions, because only one plus can react with a particular enzyme. The model charter 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 ranges from 1-14, where lower levels are acidic, higher levels are prefatorial and 7 is neutral. Maintenance of a continual internal environment 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. thither 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.

The 2 Stages of Homeostasis The organism detects changes from the stable sing e.g. change in torso 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 repellant system, which along with the endocrine system, co-ordinates and controls the... im trustworthy everyone has a different panache of prep for exams. From a HSC spatial relation i would comment proverb these are almost to breif waiver into trials (and im only in yr 11). good luck with the exams though. If you unavoidableness to get a in force(p) essay, order it on our website: Ordercustompaper.com

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