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lecture 2- Chemical level

the level of organisation: chemical & molecular, atoms, cellular, tissue, organ, organ system, and organism level.
List the four chemical elements that make up most of the body’s mass nitrogen, hydrogen, oxygen and carbon
Distinguish between organic and inorganic compounds organic compunds- (from life) any molecule that contains carbon and hyrdrogen atoms. eg. methane (CH4) = 5 organic compounds. inorganic compound- any molecule that does not contain carbon or hydrogen. (CO2 is an exception) oxygen, h20,
List the properties of water that make it important for living things - SOLUBILITY inorganic and organic molecules can dissolve to become a solution. - REACTIVITY medium for chemical reactions or chemical reaction participant. -HIGH HEAT CAPACITY -LUBRICATION
List the properties of inorganic acids, bases and salts acid- release H into solutions. hydrolic acid. Base- removes H+ ions from solution. Salts- compound made of ions other than H+ and OH-
Describe the pH scale pH- a measure of H+ concentration in solution. neutral=7 acid=<7 basic=>7
Identify the normal pH range for human blood 7.35-7.45
Define a buffer a buffer is compounds that balance the pH of a solution by either adding or removing H+.
List the five organic compounds carbohydrate, protein, lipids, nucleic acid, high energy compounds.
Created by: dlbarton



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