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BIOLOGY Flashcards

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5476298676CellBasic unit of structure of living cells.0
5476298677Cell Theory~ All organisms are made up of cells, ~ Smallest organisational unit,1
5476298678BiogenisisCells derived from pre-existing cells.2
5476298679Plasma MembraneAlso known as the cell membrane. Separates the outside environment from inside of the cell as well as controlling what enters and exits the cell.3
5476298680CytoplasmMade up of the cytosol, and organelles (Eukaryotes.) While 80% is water, it also contains ions, salts and organic molecules.4
5476298681DNAHolds the hereditary information that's passed between generations.5
5476298682RibosomesThese organelles are responsible for the synthesis of proteins.6
5476298683Prokaryotes- Unicellular, - Lacks nucleus, - No membrane-bound organelles, - Found in extreme conditions, - single DNA chromosomes, (genosphore), - Genosphore found in nucleoid, - Cell wall (prevents damage and dehydration), - Flagella - enables free movement, - Pili - involved in transferring DNA,7
5476298684Eukaryotes- Membrane bound organelles, - Nucleus, - Specialised organelles, - 'Cell Compartmentalisation'8
5476298686BacteriaSingle-celled organisms. Most numerous and oldest organism in the biosphere.9
5476298687ArchaeaExtremophiles. Organisms that live in extreme conditions, such as acidic, boiling or freezing conditions.10
5476298688LipidsFatty organic compounds, composed of carbon, hydrogen.11
5476298689Organelle MembranesAllows each organelle to have their own composition. Also helps control the movement within the cell.12
5476298690Rough Endoplasmic ReticulumProcesses and modifies proteins.13
5476298691Smooth Endoplasmic RetculumSynthesis lipids.14
5476298692LysosomeDigests cellular waste material and foreign matter.15
5476298693MitochondrionObtains energy from organic compounds and is the site of cell respiration.16
5476298694ChloroplastUses light energy, carbon dioxide and water to produce glucose. Also the site of photosynthesis.17
5476298695CentrioleInvolved in cell division and formation of cell structures.18
5476298696FlagellumMobility.19
5476298697VacuoleStores substances and helps plant cells with their structure.20
5476298698PlastidSynthesis' and storage's various organic molecules.21
5476298699Cell WallCell structure and protection.22
5476298700Animal Cell23
5476298701Plant Cell24
5476298702EnzymesProteins that act as biological catalysts. They only catalyse one type of reaction.25
5476298703Biological term for cell membranesemi / selectively / differentially permeable membrane26
5476298704Fluid Mosaic FluidThe structure of the cell membrane. Consisting of protein, lipids, phospholipid bilayer and more.27
5476298705PhospholipidsThe building block of Phospholipid Bilayer. Made up of a hydrophobic (doesn't like water) tail and hydrophilic (likes water) head.28
5476298706ProteinPermanent (Integral), temporary (peripheral) or spanning the phospholipid bilayer (transmembrane.)29
5476298707Carrier ProteinChange shape/form to allow certain shaped molecules through. Involved in Active Transport.30
5476298708Active Transport-Requires energy to move substances, -Can only occur through carrier proteins, -ATP is needed for this process, Carrier Protein changes shape to allow a substance to be pushed through.31
5476298709EndocytosisMaterials are taken into the cell by being pocketed by the cell membrane.32
5476298710ExocytosisVecsicle enclosing particles joins membrane to release enclosed material.33
5476298711Channel ProteinAllow specific proteins through.34
5476298712OsmosisDiffusion of water molecules. ~Net movement of water molecules from an area of high water concentration to an area of low concentration. ~Water molecules move from area of low solute concentration to area of high concentration. (SALT SUCKS)35
5476298713Facilitated DiffusionA process in which substances move through the plasma membrane down the concentration gradient with the aid of carrier (transport) proteins; does not require the use of energy.36
5476298714Simple DiffusionThe movement of particles from an area of high concentration to low until it is uniform throughout.37
5476298715Concentration effect on diffusionThe concentration becomes uniform quicker if the bigger the difference in concentration.38
5476298716Temperature effect on diffusionIncreasing the temperature increases the speed of the molecules movement.39
5476298717Particle size effect on diffusionThe smaller the particle, the quicker the rate of diffusion through the membrane.40
5476298718Surface Area to Volume RatioHaving a larger surface area to volume ratio means more efficiency at exporting and taking in substances. Having a smaller surface area to volume ratios, hence decreases the efficiency of exchange.41
5476298719Concentration GradientA difference in concentration of a solute between one region and another.42
5476298720SoluteA substance dissolved in a fluid.43
5476298721SolventA fluid in which a substance is dissolved.44
5476298722HypertonicA solution with a higher concentration of solute, low concentration of water.45
5476298723HypotonicA solution with a higher concentration of water, low concentration of solute.46
5476298724IsotonicSame concentration across the board.47
5476298725Crenated / PlasmolysedShriveled and shrunk from cell wall.48
5476298726Lysed / TurgidSwelled and burst, Pushing against cell wall.49
5476298727SymbiosisDifferent species living together in a close partnership. Each species is called a symbiont.50
5476298728ProducersOrganisms that produce their own food.51
5476298739HeterotrophA heterotroph obtains organic compounds from either a producer or other heterotrophs.52
5476298740Cellular RespirationA process that all cells do. It takes place in the mitochondria and creates energy that is stored in organic compounds.53
5476298741Cellular Respiration word formulaOxygen+Glucose->Carbon Dioxide+Water+Energy54
5476298742PhotosynthesisA process used by plants and other organisms to convert light energy into food. Takes place in the Chloroplast.55
5476298743Photosynthesis word formulaCarbon dioxide + water (with light) = Glucose and Oxygen56
5476298745Root Hair CellsCells in the roots of plants that have long extensions to increase surface area for the absorption of water and minerals.57
5476298746StomataA microscopic pore surrounded by guard cells in the epidermis of leaves and stems that allow gas exchange between the environment and the interior of the plant.58
5476298747Leaf Structure59
5476298748TranspirationPassive movement of water from roots to leaves- 99% of which is lost through stomata. 1% used for metabolic processes.60
5476298749SystemA group of organs that work together to perform a vital task.61
5476298750Human Digestive SystemMouth, oesophagus, stomach, small intestine, large intestine, + gall bladder and liver62
5476298751Function of Human Digestive SystemDigestion helps break down foods into waste and nutrients.63
5476298752Chemical DigestionEnzymes break down food into smaller molecules.64
5476298753Mechanical DigestionPhysical breakdown of large pieces of food into smaller pieces.65
5476298754EnzymesProteins that speed up chemical reactions in a cell.66
5476298755ProteasesEnzymes that breakdown protein, present in saliva and gastric secretions.67
5476298756AmylasesDigestive enzymes that converts the starch into maltose in our digestive system.68
5476298757Lipasesenzymes that break down lipids into soluble fatty acids.69
5476298758HomeostasisMaintaining a constant internal environment at optimum levels.70
5476298759Factors under Homeostatic control- Blood glucose, - Body Temp, - Oxygen & C02 Concentration, - pH of blood tissue and fluids,71
5476298761StimulusChange in environment.72
5476298765ResponseOutcome of adjustments.73
5476298766InsulinA peptide hormone produced and secreted by the Beta cells of the pancreas. Insulin targets cells in the body, especially the liver and muscle, and allows them to take glucose out of the blood (thus lowering blood glucose levels).74

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