BIOLOGY 1406; LAB PRACTICAL #1 REVIEW QUESTIONS AND CORRECT VERIFIED ANSWERS

BIOLOGY 1406; LAB PRACTICAL #1
REVIEW QUESTIONS AND CORRECT
VERIFIED ANSWERS
THEA2MICROSCOPEA2-A2Ans--LabA2ExerciseA2#4.

TwoA2typesA2ofA2MicroscopesA2-A2Ans--Stereoscopic/dissectingA2microscopeA2(10x-30x)
CompoundA2lightA2microscopeA2(40x-400x)

MicroscopeA2weA2useA2-A2Ans--CompoundA2lightA2microscopeA2(40x-400x)

-useA2aA2beamA2ofA2electronsA2toA2formA2anA2imageA2ofA2theA2specimen
-twoA2differentA2lensesA2thatA2magnifyA2anA2imageA2twiceA2beforeA2itA2isA2actuallyA2seen

CellsA2-A2Ans---theA2smallestA2livingA2units
-microscopic
-cannotA2beA2seenA2withA2theA2nakedA2eye,A2onlyA2microscopes

KnowA2allA2partsA2ofA2theA2microscopeA2-A2Ans--

BaseA2-A2Ans--providesA2supportA2thatA2helpsA2stabilizeA2theA2microscope

theA2baseA2contains;A2
-substageA2light:A2providesA2theA2lightA2thatA2illuminatesA2theA2specimen
-switch:A2turnsA2theA2lightA2onA2andA2off
-glassA2projectionA2lens:A2coversA2theA2lightA2source

ArmA2-A2Ans--supportsA2theA2bodyA2tubeA2andA2adjustmentA2knobs

StageA2-A2Ans--
flat,A2blackA2platformA2whereA2theA2microscopeA2slideA2isA2placedA2forA2viewingA2

-
condenser:A2roundA2openingA2inA2theA2stageA2thatA2lightA2passesA2throughA2toA2reachA2th
eA2specimen.A2ItA2helpsA2concentrateA2lightA2intoA2aA2tightA2beamA2beforeA2itA2entersA2theA
2specimen


MechanicalA2stageA2apparatusA2(notA2apartA2ofA2theA2drawing)A2-A2Ans--
attachedA2toA2theA2stage;A2hasA2aA2spring-
loadedA2slideA2frameA2thatA2anchorsA2inA2placeA2ofA2viewingA2(left,A2right,A2front,A2back)

, Disc/IrisA2diaphragmA2-A2Ans--
underA2theA2stage;A2aA2wheelA2thatA2controlsA2theA2amountA2ofA2lightA2passingA2throughA2t
heA2specimen

BodyA2tubeA2-A2Ans--
attachedA2toA2theA2arm;A2containsA2mirrorsA2thatA2gatherA2lightA2comingA2fromA2theA2lense
sA2andA2reflectA2itA2upA2toA2theA2eyes

EyepieceA2(ocular)A2-A2Ans---atA2theA2topA2ofA2theA2bodyA2tube
-containsA2aA2lensA2(calledA2theA2ocular)A2w/A2magnificationA2ofA210x
-hasA2aA2pointer

RevolvingA2Nose-pieceA2-A2Ans---locatedA2atA2theA2lowerA2endA2ofA2theA2bodyA2tube
-hasA2(3)A2objectivesA2attachedA2toA2it,A2thatA2canA2beA2changedA2byA2rotatingA2theA2nose-
piece

3A2differentA2objectivesA2-A2Ans--1)A2scanningA2Objective
2)A2lowA2powerA2objective
3)A2highA2powerA2objective

ScanningA2ObjectiveA2-A2Ans---shortestA2objective
-magnificationA2ofA2onlyA24X

LowA2powerA2objectiveA2-A2Ans---middleA2objective
-magnificationA2ofA2onlyA210x

HighA2powerA2objectiveA2-A2Ans---longestA2objective
-magnificationA2ofA2onlyA240x

2A2differentA2typesA2ofA2focalA2adjustmentA2knobsA2-A2Ans---
locatedA2onA2theA2lowerA2sidesA2ofA2theA2arm
-
adjustA2theA2distanceA2betweenA2theA2objectiveA2lensA2andA2theA2specimenA2beingA2obser
vedA2whenA2focusing
1)A2courseA2adjustmentA2knobs
2)A2fineA2adjustmentA2knobs
-
eitherA2raiseA2orA2lowerA2theA2stageA2closerA2toA2orA2fartherA2awayA2fromA2theA2objectiveA2l
ens

CourseA2adjustmentA2knobA2-A2Ans---larger,A2upperA2knob
-toA2focus,A2movesA2upA2andA2down

FineA2adjustmentA2knobA2-A2Ans---small,A2lowerA2knob
-sharpenA2theA2image