PHYSIOLOGY 4521552 II EXAMINATION Thursday March31 2005 INSTRUCTIONS This examinationconsistsof 35 multiplechoicequestions Pleaseprintyour g g and gj jgj lg g g Del clearlyon the answer circleson the answersheet sheet Fill in corresponding Pleasemarkyouranswerscarefullyon the answersheetwith a 2 penci IMPoRTANTNoTE lF YoU ERASE DO SO COMPLETELY Thereis onlyglg bgglg4 I for eachquestion Thisexamconsistsof Z pages including thiscoverpage and3 questions Pleasecheckthatyourcopy pages hasall All questionscarryequalweight readthe questionscarefully for study Answers will be postedas soonas You may keepthe examination possibleon UBLearns Be sureto makea listof youranswersbeforeleavingthe examroomso that you can gradeyourselfon this exam PLEASETURNOFFALL CELLPHONES CHEATING ON EXAMS ln an effortto decreasethe temptationto cheaton hourlyand final exams we ask that youfollowthe procedureslistedbelow 1 2 3 4 5 KeepyouranswersheetggyEg exceptwhen addingan answer When creatingyour own list of answersto check againstthe key pleasewrilesmalland be as discrete as possible Pleaseinformone of the instructorsggjgg es pgsgD 9 if you suspectsomeoneis cheating Yourcommentswill be kept confidential Rememberthat accordingto Universitypolicy a personglyilg answersis equallyas guiltyas a personlggglylg answers fromthe University Theultimatepenaltyfor cheatingis dismissal For questions1 15useansrYer A if the ENTIRE statementis TRUE and 8 if ANY PART of tle statementis FALSE in anindividualwithPulmonary lhatfung t t Themainreason p 1g ry surfacetensionis incr ased r qbroti is because i thelungby equalizingsurfacetensionin alveoliwith r 2 Surfactantstabilizes differentdiameters aftertheinspimtorymusclescontractis entry t 3 The eventthatoccursimmediately ofair intotheluDgs r increasedPrct will drymalipallyimprove artedaloxygen f Nasaloxygentherapy contentin an individual with anemiadueto blood loss in alveolarventilationby stimulationof T 5 Metabolicacidosiswill causean increase i Il ltheqg U chemoreceptors l u i 6 During exercise the Pdmaryreasonthat oxygenconsumptionincreasesby up to 15lig resgreatertharat re is becausethe qao2 iqiaeasd markedly a r v t 7 Absorptionoccursthroughoutthe Pulmonarycapillary becausethe proteinoncotic pressurein the blood is greaterthanthe blood hydrostaticPressure work is requiredto overcomesurface f 8 During inspiration in the normallung more i tensionthan the elasticfibers of the lunghasdifficultyexpirilrgdueto thelossof elastic 1 9 An individualwith emphysema recoil pressureof the lung andto an inqease in airway resistance u i A personwith anemiadue to decreasedproductiotrof normal red blood cells will 10 fot the decreasedoxygen increasealYeolarventilation substantiallyto comPensate carrying capacityof the blood I K channels f 11 Stimulationof the glomuscellsin the carotidbodiesinactivates causingthe cells to depolarizeandreleasean excitatory neurotmnsmitterin responseto calcium entry thedriveto in a normalindividualwill decrease Volunlaryhyperventilation ft12 breathellIilllltily by increasingthe Pao2 J will causean increasein alveolarventilationby d recdl f 13 An increasein the P q Cp stimulatingthe rii6iiull y chemoreceptors contentof 02 cao2 carbonmonoxide o oo uo ooivalentda c rrase illh9 arrerisl t co makesit rntt aim rt t o t acutelvthananemiabecause i b i i 02 frcm hemoglobin i mucirmor aiftcutt to dissociate f aodlower Duringinspirationin thestandingPosition most airgoesto the middle 15 eelon sof h lungbecausethey aremorecompliantthanregionsatthetopofthe lung list provided For questions16 35 choosethe ONE BESTansrYerfrom the 6 thatinvolvesthealYeolar capillary withpulmoqarap sease tu lna person is tt trioSr ttJty inaicaiiontrratAiffusionacrossthis membrane riu n is compromised d aD increase in PaO2 in Paoz b a decrease in PaCO2 G anincreas in PaCO2 decrease a ia in PaO2andPaCO2 equalincreases s bu 6 of afierial blood CaO2 in an individualliving at an altitudeof lt O2 that in an individual who hasresided n o forj montls will be 10 000feet at sealevelfor 6 months greaterthan lessthan c equalto d thereis notenoughitrforuationto aNwerthis question theo qlgencolsg gplon i lnllqtlr of an iO Giventhefollowingmeasurements s 2 strokeuolum e Tmi heanrate l0Obeats min inJiriauuf iff Ue qo CiOz 10volumes Volumesgo rnl of 02perl0O CiOA m vol umes for thisproblem ml of blood YoudoN If needa calculator a Lt r o l u a loo L 500 t om d 5 000 e 10 000 i v U f J c1 d tj 1 c 1l J t t1 was 19 A man was in an automobileaccidentandhis spinalcord was severcd He able to inspireand xpirewithout much difficulty at rest However his coqsh not hecourd l rem9 f J x iHililil li imaknd C3 x 5 ct c Tl2 lt 20 wbich of the following could causean incrcasein pulmonaryvascular resislalce a left heartfailure I b a decreasein PAO21 c a large decreasein the numberof pulmonarycaPillaries 1 d onlya baretrue 19 a b and c are true t r The 4Q of a patientis found to b tqqls3g lgryE could causethis condition b c d e i V which of the following I shunt f thickeningof the alveolar capillarymembrane f protluction of red blood cells l UlSlgjiu g U sd o n l ya b a re tru e a b and c aretru zz The diffusing capacityofthe lEgfQI Q2 ilcreasesduring cxercisein a normal individual becausethe F a alveolarsurfaceareaincreases b PiO2 decreases vl t 1 f c alveolar capillarymembranebecomesthinner onlya baretrue Ie a b and c ale true be 23 The diffusing capacityof the lulgloloZi n a person with empbys emamay lessthan normalbecause a of the lossof alveolarsePtae b pulmonaryedemamay be present T the lung is lesscomlliant than normal 4 only a b arc true a b and c aretrue q personwith advanced Wh h of ttt following would you expgq l EI lo qe in a emphysema edema aa Pulmonary adecteaseirPaO2 c shutrt an increaseio pulmonaryvascularresistance 4 e7 normalright hearlfunctiona0ddimensions in the q9g p 4 94from 25 Which of the following assist at a abdominalmuscles T b internal intercostalmuscles c lung recoil pressure i d only a b aretrue a a b andc arerua d vg t tr J 5 26 Alveolarventilation t f i da J total lung capacity is wastedventilation equalsthe MY teight in Pounds if Vr39qrg59g and frequencyof breathingincreasesbut VE decreases remainsthesarne increasesii H cortent of the blood decreases 1 i i is greaterin regionsof the lung with shunt 2 which of the following helpsto increasqlhedelivory of 02 to actively tissues metabolizing l a an increasein PCO2 b an increasein blood temperatureI 9 an increasein blood PII F d2 onlya baretrue