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Chapter 4: A tour of the Cell Flashcards

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546097231Light Microscope(LM)visible light is passed through a specimen, such as a microorganism or a thin slice of animal or plant tissue, and then through glass lenses
546097232Micrographa photograph taken through a microscope
546097233Cell Theorystates that all living things are composed of cells and that all cells come from other cells
546097234Electron Microscope (EM)a microscope that uses magnets to focus an electron beam through, or onto the surface of, a specimen. an electron microscope achieves a hundredfold greater resolution than a light microscope
546097235Scanning Electron Microscope (SEM)a microscope that uses an electron beam to study the fine details of cell surfaces or other specimens
546097236Transmission Electron Microscope(TEM)a microscope that uses an electron beam to study the internal structure of thinly sectioned specimens
546097237Prokaryotic Cellsa type of cell lacking a membrane- enclosed nucleus and other membrane- enclosed organelles; found only in the domains Bacteria and Archaea
546097238Eukaryotic Cellsa type of cell that has a membrane enclosed nucleus and other- membrane- enclosed organelles. All organisms except bacteria and archaea are composed of eukaryotic cells
546097239Ribosomescellular structure consisting of proteins and RNA organized into two subunits functioning at the sire of protien synthesis in the cytoplasm.Constructed in the nucleolus.
546097240CytoplasmMicro-filaments that fill the entire region of the cell between the nucleus and plasma membrane.
546097241Nucleoida dense region of DNA in a prokaryotic cell
546097242Flagellalong appendages that propels protists through the water and moves fluid across the surface of many tissue cells in animals
546097243Organellesa membrane- enclosed structure with a specialized function within a cell
546097244Cellular Metabolismall the chemical activities of a cell
546097245Nucleusan atom's central core, containing protons and neutrons. the genetic control center of a eukaryotic cell.
546097247Nuclear Envelopea double membrane that encloses the nucleus, perforated with pores that regulate traffic with the cytoplasm
546097248Nucleolusa structure within the nucleus where ribosomal RNA is made and assemebled with proteins imported from the cytoplasm to make ribosomal subunits
546097249Endomembrane Systema network of membranes inside and around a eukaryotic cell, related either through direct physical contact or by the transfer of membranous vesicles, nuclear envelope, endoplasmic reticulum, golgi apparatus, lysosomes and vacuoles
546097250Vesiclesa sac made of membrane in the cytoplasm of a eukaryotic cell
546097251Endoplasmic Reticulum(ER)an extensive membranous network in a eukaryotic cell, continuous with the outer nuclear membrane and composed of ribosome- studded(rough) and ribosome- free(smooth) regions.
546097252Smooth Endoplasmic Reticulumthat portion of the endoplasmic reticulum that lacks ribosomes
546097253Rough Endoplasmic Reticulumthat portion of the endoplasmic reticulum with ribosomes attached that make membrane proteins and secretory proteins
546097254Glycoproteina protein with one of more short chains of sugars attached to it
546097255Transport Vesiclea small membranous sac in a eukaryotic cell's cytoplasm carrying molecules produced by the cell. The vesicle buds from the endoplasmic reticulum or Golgi and eventually fuses with another organelle or the plasma membrane, releasing its contents
546097256Golgi Apparatusan organelle in eukaryotic cells consisting of stacks of membranous sacs that modify, store, and ship products of the endoplasmic reticulum
546097257Lysosomea digestive organelle in eukaryotic cells ; contains hydrolytic enzymes that digest engulfed food or damaged organelles
546097258Vacuolesa membrane- enclosed sac that is part of the endomembrane system of a eukaryotic cell and has diverse funcitons
546097259Central Vacuolein a plant cell, a large membranous sac with diverse roles in growth and the storage of chemicals and wastes
546097260Peroxisomes..., membranous sacs containing enzymes used to break down hydrogen peroxide
546097261Mitochondriaan organelle in eukaryotic cells where cellular respiration occurs. Enclosed by two membranes, it is where most of the cell's ATP is made
546097262Mitochondrial Matrixthe compartment of the mitochondrion enclosed by the inner membrane and containing enxymes and substrates for the citric acid cycle
546097264Chloroplastsorganelle found in plants and photosynthetic protists,=. Absorbs sunlight and uses it to power the synthesis of organic food molecules.
546097275Extracellular Matrix (ECM)the meshwork surrounding animal cells; consists of glycoproteins and polysaccharides
546097277Cell Walla protective layer external to the plasma membrane in plant cells, bacteria, fungi, and some protists; protects the cell and helps maintain its shape
547032058Phospholipidsmake up the membranes of the cell. Have a hydrophilic head and a hydrophobic tail
547032059Phosphlipid bilayerdouble layer of phospholipid molecules
547032060fluid mosaicdescription of the membrane structure, depicting a cellular membrane as a mosaic of diverse protein molecules embedded in a fluid bilayer made of phospholipid molecules
547032061cell junctionstructure that connects animal cells to one another in a tissue
547032062chromatinthe combination of DNA and proteins that make chromosomes
547032063chromosomea gene-structure found in the nucleus of eukaryotic cells
547032065food vacuolestiny sac in eukaryotic cells that engulfs nutrients.
547032066stromathick fluid enclosed by the membrane of a chloroplast where sugars are made.
547032067granastack of hollow disks formed of thylakoid membrane in a chloroplast where light energy is trapped by chlorophyll and converted to chemical energy during photosynthesis.
547032068cristafold of the inner membrane of the mitochondrion. When enzyme molecules are embedded it make ATP
547032069cytoskeletonmeshwork of fine fibers in the cytoplasm of a eukaryotic cell.
547032070ciliashort appendages that propel some protists through water and moves fluid across the surface of many tissue cells in animals
547554249capsulessticky outer coating that some prokaryotic cells have that protection and the ability to stick to other surfaces.
547554250pilishort projections on prokaryotic cells that heko them stick to surfaces.
547554251how is the nucleoid area of a prokaryotic cell unlike the nucleus of the eukaryotic cellThe nucleoid is not membrane bound while the nucleus is.
5475542523 structures in plant cells that are not in animal cellscell wall, chloroplast, central vacuole
5475542533 structures in animal cell that are not typically in plant cellsflagella, lysosomes, centrioles
547554254what is the function of ribosomesprotein synthesis
547554255what is the role of mRNA in making a proteincarries the genetic message of the DNA to the ribosomes where it is translated into a protein

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