Maintaining+a+Balance


 * Maintaining a Balance **

Maintaining a Balance notes
 * Websites MAB**
 * [|Board of Studies] **
 * [|On line Multiple choice questions] **
 * [|Uniserve science-resources] **
 * [|HSC online] **

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 * I have done a few for you to get started.**


 * __Active Site__ – That part of an enzyme molecule to which the substrate binds; the active site has a particular shape, giving the enzyme its substrate-specificity**
 * __Active transport__ – Movement of any molecules through a membrane against the concentration gradient; energy is required for this process.**
 * __Adaptation__ – An alteration in structure, function or behavior, that is hereditary, by which species or an individual improves its condition in relation to its environment.**
 * __Adhesion__ – forces of attraction that act to hold two seperate bodies together or to stick one body to another**
 * __Alveoli__ –**
 * __Amino acid__ – **
 * __Arteries__ – blood vessels with thick walls that carry blood under pressure, away from the heart towards other organs of the body**


 * __Blood__ – The fluid transport medium of animals**


 * __Capillaries__ – the smallest of blood vessels with very thin walls, which carry blood between arteries and veins**
 * __Capillarity__ – __Catalyst__ – A substance that speeds up reversible chemical reactions.**
 * __Cellular respiration__ – chemical process whereby oxygen combines with glucose to make energy, water and carbon dioxide are released as by-products**
 * __Chemical reaction__ – **
 * __Co-factor__ - any of various organic or inorganic substances necessary to the function of an enzyme.**
 * __Co-enzyme__- a molecule that provides the transfer site for biochemical reactions catalyzed by an enzyme.**
 * __Cohesion__ – **


 * __Denaturation__ – The change of shape of a protein, due to heat or changed pH, causing it to lose its ability to function.**
 * __Diffusion__ – **


 * __Ectotherm__ – An animal that depends on an external source, i.e. the environment, for heat energy, resulting in a greater fluctuation in body temperature.**
 * __Effector__ – Describes the organ, gland or muscle which carries out a response when activated by nerve endings as a result of a stimulus**
 * __Enantiostasis__ –**
 * __Endotherm__ – An animal whose heat is generated through its own metabolic activities, resulting in a fairly stable body temperature maintained within a narrow range**
 * __Enzymes__ – Biological protein catalysts produced by cells and responsible for all chemical reactions in living organisms.**
 * __Estuaries__ –**

Hypothermia -
 * __Haemoglobin__ – is an iron containing protein molecule that gives red blood cells their colour- red pigment**
 * __Homeostasis__ – processes which maintain a stable internal environment in an organisation. usually involving negative feedback to counteract fluctuations in the external environment.**


 * __Induced fit model__ –the model of enzyme functioning based on the idea that an enzyme is not rigid, but alters shape slightly when it binds with a substrate**
 * __Internal environment__ –**


 * __Lock and key model__ – Model of enzyme functioning based on the idea that an enzyme is rigid and reciprocally shaped to fit a substrate like a key fits a lock.**
 * __Longitudinal__ – **
 * __Lungs__ – the sac-like respiratory organs of air-breathing vertebrates**


 * __Metabolism__ – the sum of the chemical processes occurring within a living cell or organism**


 * __Nephron__ – **
 * __Nervous system__ – **
 * __Nitrogenous wastes__ – End products of nitrogen metabolism (including urea, uric acid and ammonia)**


 * __Optimum__ – the most favorable conditions or level for growth, reproduction, or success**
 * __Osmosis__ –** **the movement of water to areas of high water concentration, from areas of low water concentration through a semi permeable membrane.**


 * __pH__ – a measure of the acidity or alkanity of a solution**
 * __Phloem__ – The vascular tissue in plants thattransports organic nutrients (food) from where they are manufactured, up and down the plant**
 * __Plasma__ – The yellow, watery fluid part of blood, 90% water 10% mainly proteins. Plasma makes up most of the volume of blood and carries sibstances of dissolved or suspended form**
 * __Proteins__ – A complex macromolecule consisting of polypeptide chains of amino acids, containing the element nitrogen as well as other elements commonly found in organic molecules**


 * __Receptor__ – a specialised cell or group of nerve endings that detect sensory stimuli**
 * __Response__ – Any behaviour of a living organism that results from, and is linked to, a stimulus**


 * __Specific__ – Clearly defined or identified**
 * __Stimulus__ – A change in environment detected by the sensory organs of organisms**
 * __Stomates__ – an opening or pore located in the epidermis of plant parts through which gases such as water vapour, O2 and CO2 can enter or leave a molecule upon which an enzyme acts**
 * __Substrate__ – a substance on which an enzyme acts**


 * __Translocation__ – **
 * __Transpiration__ – evaportation of water vapour from a plant through the stomates of leaves**
 * __Transverse__ – **


 * __Valves__ – **
 * __Vascular__ – **
 * __Veins__ – thin walled blood vessels that return blood to the heart (usually deoxygenated)**


 * __Xylem__ – is specialised tissue for the transport of water and dissolved inorganic minerals from the roots to the leaves.**