Definitions 3.0 / 5 based on 1 rating ? AllUniversityAll boards Created by: simren soorCreated on: 23-04-13 11:50 Cell Membrane unit filled with an aqueous solution of chemicals and capacity to maintain itself 1 of 20 Tight junctions membranes of neighbouring cells pressed together 2 of 20 Desmosomes fasten cells together in strong sheets 3 of 20 Gap Junctions cytoplasmic channel between neighbouring cells 4 of 20 Plasma membrane Defines the exterior of a cell and controls movement of molecules in and out 5 of 20 Tonicity Ability of a solution to cause a cell to gain or loose water 6 of 20 Isotonic same as cell 7 of 20 Contact dependant membrane bound signalling protein binds to receptor on target cell 8 of 20 Paracrine secreted molecules carried far or act as local mediators 9 of 20 Autocrine Cell secretes signalling molecule that binds back onto itself 10 of 20 Relay proteins Pass message onto next signalling molecule 11 of 20 Messenger proteins carry signal A-B 12 of 20 Adaptor Proteins Link one signalling protein to another 13 of 20 Secondary messengers Small intracellular signalling molecules released in response to receptor activation 14 of 20 Species Individuals that can interbreed in nature to produce fertile offspring 15 of 20 Genotype The genetic makeup of an organism 16 of 20 Phenotype Characteristics observed 17 of 20 PCR polymerase chain reaction - amplification of DNA regions 18 of 20 Natural Selection Process in which individuals with a certain trait survive and reproduce more successfully than other due to that trait 19 of 20 Adaptation A trait that allows an individual to survive and reproduce more successfully 20 of 20
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