AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

Chapter 1: Cellular Biology Flashcards

Terms : Hide Images
10337670966Prokaryotes-No distinct nucleus (single, circular chromosomes) -Lack histones, organelles -Cyanobacteria, bacteria and rickettsiae0
10337670967Eukaryotes-complex cellular organization -membrane-bound organelles -well-defined nucleus with several chromosomes -higher animals, plants, fungi, protozoa and algae1
10337670968Nucleushome of DNA including replication, repair and transcription2
10337670969histone proteinsDNA-binding, involved in the coiling of chromosomes3
10337670970cytoplasmA jellylike fluid inside the cell in which the organelles are suspended; a place for proteins to be made and stored4
10337670971cytoplasmic matrixSurrounding the nucleus, made up of microtubules, microfilaments, and intermediate filaments creating a skeleton5
10337670972cytosolThe soluble portion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membranes.6
10337670973Ribosomeswork with messenger and transfer RNA to appropriately synthesize proteins, genes, DNA7
10337670974Endoplasmicreticulumsite of protein synthesis and transport of protein and lipid components of most organelles8
10337670975Golgi Complexprocess and package proteins (from endoplasmic reticulum) into secretory vesicles that break away and migrate to various intra and extra cellular destinations (including plasma membrane)9
10337670976cisternaethe name of the chambers inside the endoplasmic reticulum that stores lymph and other fluids10
10337670977lysosomesoriginate from the golgi; catalyze proteins, lipids, nucleic acids and carbohydrates (autodigestion)11
10337670978peroxisomescontain oxidative exnymes that break substance down into harmless products12
10337670979mitochondriasurround by a double lipid-bilayer membrane that participates in oxidative phosphorylation13
10337670980oxidative phosphorylationWhen energy is released at each step of the chain is stored in a form the mitochondrion can use to make ATP14
10337670981cytoskeleteon"bones and muscles" of the cell that maintains the cell's shape and internal organization. This permits movement of substances within the cell and movement of external projections (cilia and flagella)15
10337670982caveolaecapture and transport material into cell16
10337670983vaultscytoplasmic ribonucleoproteins, shaped like octagonal barrels; cellular trucks - move molecules from nucleus to elsewhere in the cell17
10337670984Plasma MembraneA flexible selectively-permeable phospholipid bilayer forming the boundary of the cells; controls the composition of a space or compartment they enclose18
10337671044protein transport channel19
10337671045cell surface receptor20
10337671046cell surface markers21
10337671047cell adhesion protein22
10337671048attachment of cytoskeleton23
10337670985cellular receptorsprotein molecules on the plasma membrane, in the cytoplasm or in the nucleus that can bin with specific smaller molecules24
10337670986How are cells held togehter?1) plasma membrane 2) extracellular matrix 3) specialized cell junctions25
10337670987Extracellular matricfibrous proteins in gel substance produced by fibroblast and diffuse water and nutrients made of collagen, elastin, and fibronectin26
10337670988DesmosomesAnchoring junctions that prevents cells subjected to mechanical stress from being pulled apart; button like thickenings of adjacent plasma membranes connected by fine protein filaments27
10337670989Tight junctionsMembranes of neighboring cells are pressed together, preventing leakage of extracellular fluid (found in blood-brain barrier)28
10337670990Gap Junctionsallow small ions and molecules to pass directly from the inside of one cell to the inside of another = coordinate activities of adjacent cells (ie heart muscle cells); contact signalling29
10337670991Gatingprocess by which permeability of a cell is controlled - increased Ca+ causes decreased permeability at junctional complex = allows uninjured cells to protect themselves from inured neighbors (injured cells release Ca+)30
10337670992Paracinecell-to-cell communication31
10337670993AutocrineCell-to-itself communication32
10337670994Hormonalthrough blood stream communication33
10337670995Neurohormonalfrom brain through bloodstream and neurons34
10337670996contact signaling by plasma membrane-bound receptorsplasma membrane-bound receptors35
10337670997remote signaling by secreted moleculesecreted molecule36
10337670998contact signaling via gap junctionsgap junction37
10337670999extracellular messengers (ligands)convey instructions to the cell's interior via plasma protein receptor on target cell38
10337671000Metabolismchemical tasks of maintian essential cellular functions39
10337671001AnabolismMetabolic pathways that construct molecules, requiring energy.40
10337671002CatabolismMetabolic pathways that break down molecules, releasing energy.41
10337671003Adenosine Triphosphate (ATP)created from the chemical energy contained within organic molecules; used in synthesis of organic molecules, muscle contraction and active transport; stores and transfers energy42
10337671004digestionextracellular breakdown of proteins, fats, polysaccarides to subunits43
10337671005glycolysisintracellular breakdown of subunits to pyruvate, then to acetyl CoA (anaerobic & limited ATP production)44
10337671006Krebs cycleAlso know as citric acid cycle; production of ATP via oxidative phosphorylation45
10337671007Oxidative Phosphorylationoccurs in the mitochondria; mechanism producing energy from fats, CHO, proteins; involves the removal of electrons from various intermediates via a co-enzyme such as nictinamide adenine dinucleotide (NAD) to transfer electrons46
10337671008Anaerobic glycolysisif oxygen is not available, CHO is converted to pyruvic acid (pyruvate) in cytoplasm with production of two ATP molecules which is insufficient for energy needs; pyruvate is then converted to lactic acid (when oxygen is available lactic acid is converted back to either pyruvic acid or glucose which enters citric acid cycle)47
10337671009ElectrolytesA substance that is dissolved in solution and some of its molecules split or dissociate into electrically charged atoms or ions; make up 95% of solutes48
10337671010cationspositively charged and migrate toward the negative pole49
10337671011Anionsnegatively charged and migrate toward the positive pole50
10337671012Measurement of Electrolytesmilliequivalents per liter (mEq/L)51
10337671013monovalentone charge52
10337671014divalent2 charges53
10337671015Passive transportRequires NO energy, Movement of molecules from high to low concentration, Moves with the concentration gradient54
10337671016OsmolarityA measure of the total solute concentration per liter of solution55
10337671017OsmolatityA measure of the amount of solids dissolved in a solution56
10337671018IsotonicHaving the same solute concentration as another solution.57
10337671019HypertonicHaving a higher concentration of solute than another solution.58
10337671020HypotonicHaving a lower concentration of solute than another solution59
10337671021Active transportEnergy-requiring process that moves material across a cell membrane against a concentration difference60
10337671022EndocytosisA process in which a cell engulfs extracellular material through an inward folding of its plasma membrane.61
10337671023PinocytosisA type of endocytosis in which the cell ingests extracellular fluid and its dissolved solutes. (drinking)62
10337671024PhagocytosisA type of endocytosis in which a cell engulfs large particles or whole cells (eating)63
10337671025Receptor mediated Transportbinding to receptors triggers vesicle formation64
10337671026CaveolaeFine endocytotic vesicles through which calcium is shuttled into muscle. It is then sequestered by the sarcoplasmic reticulum, which lines the cells.65
10337671027ExocytosisProcess by which a cell releases large amounts of material66
10337671028Action potentialDepolarization - threshold potential - repolarization - refractory period67
10337671029HyperpolarizedAn electrical state where the inside of the excitable cell is made more negative compared with the outside of the cell and the electric potential of the membrane increases (gets more negative)68
10337671030HypopolarizedWhen membrane potential is more positive than normal (in a more excitable state)69
10337671031Absolute refractory periodThe minimum length of time after an action potential during which another action potential cannot begin.70
10337671032Relative Refractory perioda period after firing when a neuron is returning to its normal polarize state and will only fire again if the incoming message open parentheses impulse) is stronger than usual; returning to arresting state71
10337671033Mitosisthe dividing of all of the cell's contents (making a duplicate)72
10337671034Cytokinesisdividing the cytoplasm (almost equally into the two new cells)73
10337671035ProphaseChromosomes become visable, nuclear envelop dissolves, spindle forms74
10337671036MetaphaseChromosomes line up in the middle of the cell75
10337671037AnaphaseCentromeres divide76
10337671038TelophaseAfter the chromosome separates, the cell seals off77
10337671039Cellular division ratesdepend on protein growth factors and genes (different cells grow at different rates)78
10337671040Nerve Tissuea body tissue that carries messages back and forth between the brain and every other part of the body79
10337671041Epithelial TissueA body tissue that covers the surfaces of the body, inside and out80
10337671042Connective TissueA body tissue that provides support for the body and connects all of its parts81
10337671043Muscle TissueA body tissue that contracts or shortens, making body parts move.82
10337671049Simple Squamous83
10337671050Stratified Squamous84
10337671051Transitional85
10337671052Cuboidal86
10337671053Simple columnar87
10337671054stratified columnar88
10337671055Pseudostratified ciliated89
10337671056Dense regular90
10337671057Dense irregular91
10337671058Fibers92
10337671059Loose connective tissue93
10337671060dense connective tissue94
10337671061elastic connective95
10337671062reticular connective96
10337671063cartilage97
10337671064adipose98
10337671065smooth99
10337671066striated100
10337671067cardiac101

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!