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Unit 2 - AP Bio Flashcards

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14960265858cell theory- All living things are made of cells - Basic units of life - Cells come from cells0
14960278570surface area to volume ratio in cells how does shape help?if volume is disproportionate organelles cannot transport and do all the processes efficiently b/c certain places are close to the surface and easier transport1
14960309595cell membrane makeuplipids tails and heads are polar lipids don't like water but can pass thru cell membrane cholesteral proteins2
14960334396prokaryotes vs. EukaryotesP - no nucleus to hold DNA, cell wall E - DNA in nucleus, mitochondria Both - ribosomes, cell membrane3
14960352792Plant vs. Animal CellsPlant: use oxygen - turgor pressure (really compact cell membrane) water pressure and when plant wilts cell membrane shrivels4
14960379294Lysosomesbreak down organelles that don't work anymore. break down macromolecules into monomers w/ digestive enzymes. digest the materials that come into the cell by phagocytosis. made by golgi bodies5
14960396625rough ERRibosomes are on the surface and involved in protein synthesis - chemically tags/labels proteins, cellular transport thru vesicles -- in lumen the proteins mature and become glycoproteins6
14960408528how do organelles adapt to fit in cells?folding to fit better. ER has more surface area for chemical reactions7
14960413159Golgi apparatuspackages things - puts in vesicles to be labeled and recognized to know where need to go. adds carbs to proteins to make them glycoproteins (connected to rough endoplasmic reticulum). vesicles come off trans region and go to lysosomes or cell membrane8
14960428324Smooth ERlipids made - break down glycogen, stores calcium ions - chemical modification of toxic molecules to better have them transported outside of the cell9
14960432882ribosomesprotein synthesis10
14960442003Christaefolds in mitochondria that have more surface are for more chemical reactions11
14960456280mitochondria and chloroplasts have their own...dna and take food and create energy12
14960475368How cell membrane can alter fluidity...- cholesteral - ^ = more stiff - tails shortening to make more fluid - tails going from saturated to unsaturated13
14960494513aquaporinschannel proteins that go thru whole cell membrane to let water in14
14960512207peripheral proteinsdon't go thru whole membrane15
14960519743Passive transportno ATP being spent16
14960528124osmosisDiffusion of water through a selectively permeable membrane17
14960528126diffusionMovement of molecules from an area of higher concentration to an area of lower concentration. the smaller the molecule the faster it will diffuse higher temp = more diffusion the greater the concentration gradient the faster diffusion occurs18
14960531836facilitated diffusionMovement of specific molecules across cell membranes through protein channels19
14960536170hypotonic solutiontoo much water going into cell and the cell bursts - more solute inside cell than outside20
14960564324hypertonic solutionmore solute outside cell than inside - cell shrivels b/c water is moving out of it21
14960584760isotonic solutionsame amount of solute inside and outside the cell so no movement22
14960601642carrier proteininsulin has to be present so that the protein will transport glucose into the cell23
14960609445pump proteins - active transportmovement from low to high concentration - 3 sodium pumped out of cell every time 2 potassium are pumped in24
14961406734archaebacterialive in inhospitable places25
14961451954peroxisomes relationship to catalasemake catalase and catalase breaks down hydrogen peroxide26
14961499379Endosymbiotic theorytheory that eukaryotic cells formed from a symbiosis among several different prokaryotic organisms - chloroplast and mitochondria have their own DNA27
14961536637mitochondriaharvest chemical energy ATP from glucose: breakdown of glucose begins in cytosol right outside the membrane into the christae28
14961549982nucleushouses DNA, site of ribosome production in the nucleolus, DNA replication, transcription in nucleus and translation in cytoplasm29
14961567757vacoulesstorage of toxic substances and waste products larger ones in plant cells osmosis of water in cytoplasm into vacoule creates turgor pressure on the cell wall to keep structure break down macromolecules into monomers to be used for other things30
14961618071fluid mosaic modelpiece of art with multiple pieces making it up and things sticking out -- Little pieces sticking out -- phospholipids are not connected to each other31
149625466633 ways fluidity of membrane is affected1.Lipid comp - change lipids to saturated or unsaturated to allow looser composition and adjust to temp. 2. Temperature - more fluid b/c makes it less rigid and adapts to temp Phospholipids-varying types 3. Cholesterol-up to 25% of membrane composition Cholesterol → liver produces cholesterol b/c needed in cell membrane Provides structure → more cholesterol = more structure Decrease cholesterol to keep membrane loose and not freeze32
14962556241transmembrane proteinsprotein goes all the way through the membrane --- Allows product to not be rejected by the hydrophobic cells with the channel proteins33
14962567737recognition sitesidentifying the cell or decide when things come in and out34
14962581494glycolipidcarb to lipid35
14962585332glycoproteincarb to protein36
14962592888proteoglycanlonger chains of carbs - protein37
149626086113 types of proteins in cell membraneProteins are an important part of the membrane 1. Peripheral- interact with polar areas protein that is only on the outside of the membrane (no interaction with hydrophobic tails) 2. Integral-Partially Embedded 3. Transmembrane-breach entire membrane38
14962648542what is the goal of diffusionequilibrium39
14962652585how does temp effect diffusiontemp increases diffusion40
14962780695carrier proteindoes not work unless a certain hormone is present moves from high to low and specific to certain thing - bind to solutes on one side and put it out the other - active transport41
14963120764channel proteinspassive transport42
14963322955water potential =water concentration, higher potential w/ higher concentration of pure water43
14963475633solute potentialdecreases w/ increased solute concentration, decrease in water potential44
14963521363for energy to be released from ATP... primary active transportthe bond needs to break between the phosphates and the rearrangement of bonds to release energy - hydrolysis reaction45
14963544986secondary active transportuses energy created from the flow of diffusion - sodium potassium pump46
14963557781endocytosiscell membrane receptors pick up on important substance and create a vesicle to bring the material into the cell (phospholipids create circle) and the materials disperse and then phospholipids go back to membrane47
14963563442exocytosisvesicle forms on inside of cells and allows vesicle to go thru the membrane and material is released and phospholipids48
14963615358phagocytosisanything transferred in and out of cells that is solid - bring in material, the secondary lysosome fuses with it, diigests it and the rest is expelled49
14963737798Pinocytosisanything transferred in or out of cells that is liquid - bring in fluid, the secondary lysosome fuses with it, diigests it and the rest is expelled50
14967785041chloroplasts- green b/c chlorophyll - harvest energy of the sun thru photosynthesis to make chemical energy - thylakoids - in stacks called granums and the fluid areounf them is called stroma and have ribosomes and dna51
14967839585glyxosomesstored lipids are converted into carbs for transport to growing cells52
14967924409plasmodesmatachannels through cell walls that connect the cytoplasms of adjacent cells - plant cells53
14967941181extracellular matrixprovides samish function the cell wall does for plant cells but is made of collagen and preteoglycans protein integrin connects this to the cell membrane and is reversible54
14967980103cell junctions1) tight junctions - prevent substances from moving thru spaces b/w cells 2) desmosomes - hold cells together with proteins but allows for movement between cells 3) gap junctions - channels that allow substances to go between cells55
14968318735active transportmoves against concentration gradient from low to high and required ATP56

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