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Chapter1.The Cell as a Unit of Healthand Disease
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1 The nucleus g ,whichisessentialforfunctionand
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survival of the cell.
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A) isthesiteofproteinsynthesis
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B) containsthegeneticcode g g g
C) transformscellularenergy g g
D) initiatesaerobicmetabolism g g
2 Althoughenergyisnotmadein mitochondria,theyareknown asg g g g g g g g g g
the power plants of the cell because they:
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A) containRNAforproteinsynthesis. g g g g
B) utilizeglycolysisforoxidativeenergy. g g g g
C) extractenergyfromorganiccompounds. g g g g
D) storecalciumbondsformusclecontractions. g g g g g
3 Althoughthebasicstructureofthecellplasma membraneis formed
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by a lipid bilayer, most of the specific membrane functions are
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carried out by:
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A) boundandtransmembraneproteins. g g g
B) complex,longcarbohydratechains. g g g
C) surfaceantigensandhormonereceptors. g g g g
D) agatingsystemofselectiveionchannels.
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4 Toeffectivelyrelaysignals,cell-to-cellcommunication
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utilizes chemical messenger systems that:
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A) displacesurfacereceptorproteins. g g g
B) accumulatewithincellgapjunctions. g g g g
C) bindtocontractilemicrofilaments. g g g
D) releasesecretionsintoextracellularfluid. g g g g
,5 Aerobicmetabolism,alsoknownasoxidativemetabolism,
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provides energy by:
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A) removingthephosphatebondsfromATP. g g g g g
B) combininghydrogenandoxygentoform water. g g g g g g
C) activatingpyruvatestoredinthecytoplasm. g g g g g
D) breakingdownglucosetoformlacticacid. g g g g g g
6 Exocytosis,thereverseofendocytosis,isimportantin
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intotheextracellularfluid. g g g
A) Engulfingandingestingfluidandproteinsfor g g g g g g
transport
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B) Killing,degrading,anddissolvingharmful g g g g
microorganisms
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C) Removingcellulardebrisandreleasing synthesized g g g g g
substances
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D) Destructionofparticlesbylysosomalenzymes for g g g g g g
secretion
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7 Theprocessresponsibleforgeneratingandconducting
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membrane potentials is:
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A) diffusionofcurrent-carryingions. g g g
B) millivoltageofelectricalpotential. g g g
C) polarizationofchargedparticles. g g g
D) ionchannelneurotransmission.
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8 Epithelialtissuesareclassifiedaccordingtotheshapeofthe cells
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and the number of layers. Which of the following is a correctly
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matched description and type of epithelial tissue?
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A) Simple epithelium: cells in contact with g g g g g
intercellularmatrix;somedonotextendto surface
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,B) Stratifiedepithelium:singlelayerofcells;all cells g g g g g g g
rest on basement membrane
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C) Glandular epithelium: arise from surface g g g g
epitheliaandunderlyingconnectivetissue
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D) Pseudostratifiedepithelium:multiplelayersof g g g g
cells; deepest layer rests on basement membrane
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9 Connectivetissuecontainsfibroblaststhatareresponsiblefor:
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A) providingafibrousframeworkforcapillaries. g g g g g
B) synthesisofcollagen,elastin,andreticular fibers. g g g g g g
C) formingtendonsandthefasciathatcovers muscles.
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D) fillingspacesbetweentissuestokeeporgansin place.
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10 Although all muscle tissue cells have some similarities, smooth
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muscle(alsoknownasinvoluntarymuscle)differs by:
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A) havingdensebodiesattachedtoactin filaments.
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B) containingsarcomeresbetweenZlinesandM bands. g g g g g g g
C) havingrapidcontractionsandabundantcross-g g g g g
striations.
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D) contractinginresponsetoincreased intracellular g g g g g
calcium.
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11 Whichofthefollowingaspectsofthefunctionofthenucleus is
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performed by ribosomal RNA (rRNA)?
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A) CopyingandcarryingDNAinstructionsfor protein g g g g g g
synthesis g
, B) Carryingaminoacidstothesiteofprotein synthesis g g g g g g g g
C) Providingthesitewhereproteinsynthesis occurs g g g g g g
D) Regulatingandcontrollingproteinsynthesis g g g g
12 Breakdownandremovalofforeignsubstancesandworn-out cell
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parts are performed by which of the following organelles?
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A) Lysosomes
B) Golgiapparatus g
C) Ribosomes
D) Endoplasmicreticulum(ER) g g
13 Impairmentinthefunctionofperoxisomeswouldresultin:
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A) inadequatesitesforproteinsynthesis. g g g g
B) aninabilitytotransportcellularproducts across
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the cell membrane.
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C) insufficientenergyproductionwithinacell. g g g g g
D) accumulationoffreeradicalsinthecytoplasm. g g g g g g
14 After several months of trying to conceive, a couple is undergoing
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fertility testing. Semen analysis indicates that the manssperm
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have decreased motility, afinding thatis thought to underlie the
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couples inability to become pregnant. Which ofthefollowing
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cellularcomponentsmaybedefectivewithin the mans sperm?
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A) Ribosomes
B) Microtubules
C) Mitochondria
D) Microfilaments