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CORNELL BIOG 1440 - Prelim 3

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StuDocu is not sponsored or endorsed by any college or universityExam 23 May 2016, questions and answersIntroductory Biology: Comparative Physiology (Cornell University)StuDocu is not sponsored or endorsed by any college or universityExam 23 May 2016, questions and answersIntroductory Biology: Comparative Physiology (Cornell University)Downloaded by yelena radutskaya ([email protected])lOMoARcPSD|3454541! !!Name:_______________________________________'1!Prelim'3'and'Final'BioG'1440'SP16' ' ' ' ' May'23,'2016' Name:''____________________________________________________''Student'ID'#:''_______________________________________________''“By'signing'below,'I'acknowledge'that'I'am'abiding'by'Cornell'University’s'Code”.''Signature:'''_________________________________________________' ''Prelim'3'–'Out'of'74'Points''Q15'Q16'Q17'Q18'Q19'Q20'Q21'Q22'SA'MC'Total'''''''''''''Final'–'Out'of'60'Points''Q35'Q36'Q37'Q38'Q39'Q40'SA'MC'Total''''''''''' Total'pages'in'exam'including'cover:'12'WATCH'YOUR'TIME!''This'is'a'2'hour'and'30'minute'test.!'PLEASE:'1.'' WRITE'YOUR'NAME'on'all'pages'of'the'exam.'2.' Be'sure'to'fill'out'your'full'name'and'your'7'digit'Cornell'ID'on'the'bubble'sheet.'3.' Record'answers'to'all'multiple'choice'questions'on'the'bubble'sheet!in!pencil!or!pen'and'write'answers'to'short'answer'questions'directly'on'the'exam'in!pen.'''4.'' Write'legibly.'If'we'cannot'read'your'answer,'we'WILL!NOT'grade'it.'5.'' Use'only'the'space'provided.'Answers'provided'outside'of'space'provided'will'not'be'graded.'6.'' Do'NOT'use'calculators'or'any'other'electronic'devices.'7.'' Write'down'the'time'and'day'your'discussion'section'meets'and!circle'the'name'of'your'TA:'''' Day!and!Time!of!your!section!_____________________________!'Adam'Bisogni''''''''Matt'Lewis'''''''David'Peck'''''''Adrian'Powell'''''''Fahad'Raza'''''''Glenn'Stamps Downloaded by yelena radutskaya ([email protected])lOMoARcPSD|3454541! !!Name:_______________________________________'2!PRELIM!3!QUESTIONS!!All!multiple!choice!questions!are!worth!3!pts!and!all!short!answers!are!worth!4!pts,!possible!74!points!total.!!!Multiple!Choice!Questions:!'1.'During'one'cardiac'cycle'of'the'human'heart,'which'of'the'following'events'occurs!3rd'among'those'listed'below?''A.''Ventricular'contraction''B.''Firing'of'the'AV'(atrioventricular)'node''C.''Conduction'of'an'action'potential'in'the'right'and'left'branch'bundle''D.''Firing'of'the'SA'(sinoatrial)'node''E.''Contraction'of'the'atria'''2.'Small,'multicellular'animals'do'not'need'circulatory'systems'for'O2/CO2'transport'because:'A.' They'do'not'need'to'do'gas'exchange.'B.' They'do'all'their'gas'exchange'through'O2'pumps.'C.' Diffusion'is'sufficient'for'their'gas'exchange'needs.'D.' The'partial'pressure'of'O2'and'CO2'in'their'bodies'relative'to'the'environment'is'sufficient'for'gas'exchange.'E.' They'generate'their'own'metabolic'oxygen.''3.'Water'beetles'breathe'gaseous'oxygen,'so'they'carry'around'an'air'bubble'at'their'rear'end'that'they'acquire'at'the'water’s'surface.''What'is'true'about'this'bubble?'A.' The'bubble'is'nothing'but'oxygen'and'carbon'dioxide'–'there'are'no'other'gases'in'it.'B.' The'oxygen'in'the'bubble'is'replenished'by'passive'exchange'of'dissolved'gases.'C.' The'bubble'helps'the'bug'maintain'buoyancy'in'the'fast'currents'in'which'it'lives.'D.''The'bubble'essentially'serves'as'an'air'tank,'which'can'only'be'refilled'by'' surfacing.'E.''Water'beetles'excrete'a'substance'toxic'to'other'animals'into'the'bubble,'to'protect'it.''4.'The'Bohr'Shift'describes'a'phenomenon'which'promotes'the'delivery'of'oxygen'to'systemic'tissue.''This'shift'occurs'at'active'muscle'because'______________.'A.' a'decrease'in'pH'strengthens'the'hemoglobinioxygen'bond'B.' a'decrease'in'pH'weakens'the'hemoglobinioxygen'bond''C.' an'increase'in'pH'strengthens'the'hemoglobinioxygen'bond''D.' an'increase'in'pH'weakens'the'hemoglobinioxygen'bond'E.' [None'of'the'above]''''''Downloaded by yelena radutskaya ([email protected])lOMoARcPSD|3454541! !!Name:_______________________________________'3!5.'Ventilation'rate'is'primarily'determined'by____________.''A.' the'body’s'need'for'O2'B.' the'partial'pressure'of'O2'in'the'systemic'tissue'C.' the'partial'pressure'of'CO2'in'the'blood'D.' the'degree'of'arterial'constriction'E.' the'number'of'O2isaturated'hemoglobin'molecules'in'the'blood''6.'Open'circulatory'systems'of'insects'are'relatively'inefficient'compared'to'the'closed'circulatory'system'of'humans.'Which'of'the'following'is'a'means'of'compensating'for'this'inefficiency?'A.' They'have'a'longer'circulation'time'than'humans.'B.' They'move'oxygen'to'tissues'with'a'separate'system.'C.' They'have'higher'levels'of'circulating'sugars.'D.' They'have'lower'pressure.'E.' B'and'C'7.'Which'of'the'following'is'FALSE!when'comparing'the'aorta'and'the'capillary'bed?''A.' The'cross'sectional'area'of'the'capillary'bed'is'larger'than'that'of'the'aorta.'B.' Resistance'is'higher'in'the'capillary'bed'than'in'the'aorta.'C.' Net'flow'is'generally'the'same'in'the'aorta'and'the'capillary'bed.'D.' Linear'velocity'is'higher'in'the'capillary'bed'than'in'the'aorta.'E.' Pressure'is'higher'in'the'aorta'than'in'the'capillary'bed.''8.'Imagine'you'are'a'biologist'studying'comparative'nephrology'in'wild'mice'that'live'in'different'habitats.''Which'characteristic'below'offers'you'the'best'way'to'discriminate'between'a'mouse'that'lives'in'the'desert'and'one'that'lives'in'a'temperate'forest?'(Assume'both'mice'are'the'same'size.)'A.' The'desert'mouse'will'have'more'juxtaglomerular'cells'because'this'will'allow'for'greater'water'retention.'B.' The'desert'mouse'will'have'smaller'kidneys'so'that'they'can'better'regulate'water'reabsorption.'C.' The'desert'mouse'will'have'larger'glomerular'capillaries'so'that'they'can'reabsorb'water'faster.'D.' The'desert'mouse'will'have'shorter'loops'of'Henle'so'that'they'will'lose'less'water'to'urine.'E.'


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