PHYSIOLOGY 4521552 EXAM 2 Wednesday March 24 2004 1 0 0 1 5 0P M Ltfs INSTRUCTIONS Pleasemarkyour nameand8 digit UB personnumber clearlyon theanswersheet Fill in the corresponding circleson theanswersheet Pleasemark your answerscarefullyon the answersheetwith a 2 pencil IMPORTANT NOTE IF YOU ERASE PLEASE DO SO COMPLETELY Thereis only one bestanswerfor eachquestion This examconsistsof pages not includingthis page andlQ questions Pleasecheckthatyour copyhasall pages All questionscarryequalweight Pleasereadthe questions carefully You may keepthe examination for study Answerswill bepostedacrossthehall flom room Shernran Hall after the exam Be sureto makea list of your answersbefore leavingthe examroom so thatyou cangradeyourselfonthis exam Ifyou believethata questionis ambiguous or incorrectlykeyed pleasesubmityour cornments on theExam Critique Form in writine and hand in durine the next class Fridav March 26 2004 INSTRUCTORSWILL NOT ANWER QUESTIONSDURING TIIE EXAM CIIEATING ON EXAMS In an effo to decreasethe temptation to cheat on hourly and final exams we ask that you follow the procedureslisted belou l 2 3 4 5 Keepyour answersheetcoveredexceptwhenaddingan answer Whencreatingyour own list of answersto checkagainstthekey please write smallandbe asdiscreteaspossible Pleaseinform oneofthe instructorsassoonaspossibleifyou suspect is cheating Your corrnentswill be keptconfidential someone Remember that accordingto Universitypolicy a persong y 4ganswersis equallyasguilryasa personreceivinq ansuers Theultimatepenaltyfor cheatingis dismissalliom the University t v t B is trueand B ifANY For questionsI 16 useanswer A ifthe ENTIREstatement is false PART ofthe statement oncoticpressure 1 Pulmonarledemawill occurif theplasmacolloidosmoticpressure meanhydrostatic bloodpressuein thepulmonarycapillaries exceeds r A Transectionof the spinalcord at the level of Tr will havelittle effect on the ability of anindividualtoclear is 4rerairwaysofexcessmucus 9 dependon theage sexandheightofthe A 3 Lungvolumesandlungcapacities individual 4 b in a personwith asthmap q y lle f LV 1 VC ratio ill decrease increasein lungcompliance because of an 5 Ar total lung capacity TLC boththechestwall andthe lungexertaforcethat causesluns volumeto Dcrease d 6 Beforeail canenterthe lung the prcssurein the alveoli PArv must be greaterthan atmospheric barometric pressure i A 7 DuriDginspirationin the normal lung more wotk is requiredto overcomelung sur acelensionthantheelasticfiberslrecoil ofLhelung 8 The body adjuststhe frequencyof breathingandthe tidal volume in orderto minimizethewo ofbreathing 1 For a givenVr of6 liters min thealveolqrventilation VA will NOT dependon the t 9 tidal volumeandfrequencyof breathingrequiredto maintainthatvE I l prcductionofnormal red lQlln a personwilh anemiadueto a lossand ordecreased r sqqq4don and bloodoxygencontent Cao2 will be bloodcells bothlhemoglobjn decreased i t I 1 MOST of thecarbondioxidein the bloodis carriedin combinationwith hemoglobin t2 tsoththe hemoglobinin red bloodcellsandtheplasmaproteinsbufferthe changein pH systemiccapillaries occursasbloodpassesth rough tal I volumeofrhe Jungto 13 Transection ofthe spinalcordat C will causethe4e5idual l inctease t 14 Duringa normalinspirationmostofthe air goesto thebottomofthe lung because that is wherelung cgmplianceis lowest f A divisionofthe autonomicnervoussystemwill 15 Stimulationofthe parasympathetic andmucussecretion J increase in both airway resistance causean l 16 Systemich rtension high blood pressurg may be decreased in someindividuals zqlp arways i oljt Ill9 n tity ofaagioteniin converting enzyme acE ina dril ffi Choosethe oneBEST answerfor ouestions17 30 a alruay resistance will bedecreased b lung compliancewill be normal t c FRC will be decreasedl trd DLco will be decreased i t PaO2will be increased J Whicb ofthefollowingcouidcausea dec re qleinlhe clearanca ofbacteriaand inialed dun parriclesFom thelung a decrgasedwater transportfrom ciliated epithelialcells into the sol layer l b decreasedextrusionof alveolarmacrophagesfrom the blood into the alveoli c decreasedciliary activity d only a b aretrue 9 a b and c are true 1 9 Alveolar rype II cells a developlate in fetal developmentand may leadto respiratory distress syndrome RDS in infants bom prematurely r b secret surfacbnt that equalizespressurein alveoli with different diamete i c line the conduc tilrgzonearways f d o n l ya b a re tru a e 4 b a n d ca xe tru e 2 tlt ty to te neaxnormal 2din which ofthe following diseasesis lung c or4p li e o t i r asthma c respiratorydistresssyndrcmeofthe newbom d emphysema1 2 I A decreasein the partial pressureof inspiredoxygen JProz could leadto rt D pulmonaryvasoconstdctionI a hypoxic b a decreasein the oxygendiffi rsioncapacityofthe lung g 1 1 stimulationof respirationvia the cential chemoreceptorsF 5d onlya baretue tue e 4 b and c are l lt l withput ori i y nuo i f I t l Jn aperson rttL a the FEVI FVC ratio will alwaysdecreaseI 1 v FRC will decreaseTt c the diffusing capacityfor 02 acrossthe alveolarcapillary membranewill increaseI d o n l ya b a re tru e e a b and c aretrue 23 During exercise the diffusing capacityofthe lung increasesbecause a the surfaceareaof the lung increases b the driving pressurefor oxygenacrossihe alveolar capillaxymembrane lncreases the thicknessof the alveolaxcapillary membraneincrcasesF o onlya baretrue a b and c are true 24 Pulnonary edema mayoccul in a p 6on with emphysemaasa result of 4 a decreasein the numberofpulmonary capilladesF 1 l L I b a decreasein the Pa62 c decreasedpumping effectiveness ofthe left hgart i d onlya baxetrue 9 q b ard c are true 25 In a normal human oxygenconsumption Voz increasesduring exercisein pan oecause a the Cae2increasesmarkedly J ri lli b the Cao decreases c the C y62increasesf tl t r 1r rentr the Cvoudecreases fl e blood flow to pulmonarycapilladesdecreasesf C r Which of the following doesNOT help to promotethe releaseof oxygenftom hemoglobin in systemic capillaries i a a decreasein tiss yeP62 b an increaspin Pcouof capillary blood c a decreasein 1f of the capillary blood d an increasein capillary blood temperature 9 ALL ofthe aboveare true 4f Tna peAonwilh carbonmonoxidepoisoning a a decreasein the Po2ofthe blood by 2OmmHgwill allow oxygento be releasedliom hemoglobin I b l both the 02 satumtionofhemoglobin andthe 02 contentofthe blood are decreased c the PaO2will be increased d the personwill be breathingmuch more rapidly than nomal e thereis no effective