m m m m m m m m
Nursing Care of the Child (Alabama State University)
m m m m m m m
Studocumis mnotmsponsored mor mendorsed mby many mcollegemor muniversity
DownloadedmbymMohamedmJabbahm(
,DownloadedmbymMohamedmJabbahm(
m)
, Chapter 1: CELLS: THE FUNDAMENTAL UNITS OF LIFE
m m m m m m m
UnitymandmDiversitymofmCells
1-1 Livingmsystemsmare mincrediblymdiverse minmsize,mshape,menvironment,mandmbehavior.mItmismestimatedmthatmth
ere mare mbetweenm10mmillionmandm100mmillionmdifferentmspecies.mDespite mthismwide mvarietymofmorganisms
,mitmremainsmdifficultmtomdefine mwhatmitmmeansmtomsaymsomethingmismalive.mWhichmof mthemfollowingmcanmb
e mdescribedmasmthe msmallestmlivingmunit?
(a) DNA
(b) cell
(c) organelle
(d) protein
1-2 Indicate mwhethermthemfollowingmstatementsmare mtrue mormfalse.mIfmthemstatementmismfalse,mexplainmwhy
mitmismfalse.
A. The mParameciummismammulticellularmmicroorganismmcoveredmwithmhair-like mcilia.
B. Cellsmof mdifferentmtypesmcanmhave mdifferentmchemicalmrequirements.
C. The mbranchlike mextensionsmthatmsproutmfrommamsingle mnerve mcellminmammammalianmbrainmcanmextendm
overmseveralmhundredmmicrometers.
1-3 Formeachmofmthe mfollowingmsentences,mfillminmthe mblanksmwithmthembestmwordmormphrasemselectedmfrommth
e mlistmbelow.mNotmallmwordsmormphrasesmwillmbe mused;meachmwordmormphrasemshouldmbe musedmonlymonce.
Cellsmcanmbe mverymdiverse:msuperficially,mtheymcomeminmvariousmsizes,mrangingmfrommbacterialmcellsmsuchmas
mLactobacillus, mwhichmismamfew
inmlength,mtomlargermcellsmsuchmasmamfrog’smegg,mwhichmhasmamdiametermofmaboutmone
.Despite mthe mdiversity,mcellsmresemblemeachmothermtomanmastonishingmdegree minmtheirmchemistry.mF
ormexample,mthe msame m20 are musedmtommake mproteins.
Similarly,mthe mgeneticminformationmof mallmcellsmismstoredminmtheir .mAlthough
DownloadedmbymMohamedmJabbahm(
m)
, containmthe msame mtypesmofmmoleculesmasmcells,mtheirminabilitymtomreprod
uce mthemselvesmbymtheirmownmeffortsmmeansmthatmtheymare mnotmconsideredmlivingmmatter.
aminomacidsmmicrometer(s) m viruses
DNAm millimeter(s) m yeast
fattymacidsmplants
meterm plasmammembranes
1-4 Howmdoesmcellularmspecializationmserve mmulticellularmorganismsmandmhowmmightmamhigh
degree mof mspecializationmbe mdetrimental?
1-5 The mflowmof mgeneticminformationmismcontrolledmbymamseriesmof mbiochemicalmreactionsmthat
DownloadedmbymMohamedmJabbahm(
m)