Biology Key Words 4.0 / 5 based on 1 rating ? BiologyASOCR Created by: EmmaCreated on: 03-01-13 09:19 Active Transport Movement of substances across membranes against their conc gradient, requiring ATP. (Transport Proteins) 1 of 30 Adhesion Force of attraction between molecules of 2 diff. substances 2 of 30 Affinity Attractive force between substances/particles 3 of 30 Atrioventricular Node Tissue in heart septum that conducts electrical stimulus from atria into Purkyne 4 of 30 Bohr Effect The effect of CO2 conc on affinity of Hb for Oxygen 5 of 30 Carrier Protein Protein in membranes - carries specific molecules/ions through using Atp 6 of 30 Casparian ***** Waterproof ***** (Suberin) in cell walls of root cells. Blocks apoplast 7 of 30 Channel Protein A protein pore in membrane - small ions & water soluble molecules can pass 8 of 30 Cohesion Attraction between water molecules due to hydrogen bonding 9 of 30 Diastole Atrium & ventricles relaxing - bp lowest 10 of 30 Endothelium A tissue that lines the inside of a structure (blood vessel) 11 of 30 Epithelium A tissue covering the outside of a tissue 12 of 30 Facilitated Diffusion Passive movement down conc gradient , aided by carrier proteins, No ATP 13 of 30 Haemoglobonic Acid Product of Hb and H+ (Acid) 14 of 30 Homologous Chromosomes that have the same genes at the same loci - pair during meiosis 15 of 30 Hydrostatic Pressure Pressure created by fluid pushing on the sides of a container 16 of 30 Lignin Waterproofing substance that impregnates walls of xylem tissue for strength 17 of 30 Microvilli Folds in cell membranes to increase SA 18 of 30 Myogenic (Heart muscle) creates own contractions 19 of 30 Organ Collection of tissues that work together to perform a specific overall function 20 of 30 Osmosis Movement water molecules from reigon of higher water potent. to are of lower water poten. across a pp membrane 21 of 30 Partial Pressure Proportion of total pressure provided by one gas as part of a mixture of gases 22 of 30 Purkyne Tissue Specialised tissue (muscle fibres) in septum that conduct impulses from SAN to ventricles 23 of 30 SAN Inititates wave of excitation oer strium 24 of 30 Stem Cells Undifferentiated cells capable of differentiating to a number of cell types 25 of 30 Tissue Group of similar cells working together to perform a particular function 26 of 30 Tissue Fluid The fluid (from blood plasma) than surrounds the cell in a tissue 27 of 30 Translocation Movement of sucrose (& other) up and down plant 28 of 30 Transpiration The loos of water (vapour) from aerial parts of the plant due to evaporation 29 of 30 Water potential A measure of the ability of water moleules to move freely in a solution. Decreased by presence of solutes 30 of 30
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