Quiz 4 (with answers) PDF

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BIOLOGY 1203

Quiz #4

NAME: Total ____ / 20

! Choose!the!BEST!answer!for!each!of!the!following!MCQ’s![1!mark!each]!

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1. Even!the!most!forceful!exhalation!leaves!air!in!the!lungs;!this!is!called!the!____and!is!needed!to!____.! a) tidal!volume;!acquire!adequate!O2! b) vital!capacity;!remove!adequate!CO2! c) functional!residual!capacity;!keep!alveoli!patent! d) residual!volume;!keep!alveoli!patent! 2. Two!gases!contribute!to!99%!of!the!total!atmospheric!pressure.!They!are!______.! a) CO2!and!O2! b) N2!and!O2! c) CO2!and!H2O!vapor! d) N2!and!CO2! 3. Hemoglobin!molecules!are!fully!saturated!when!bound!to!_______!molecule(s)!of!O2.! a) one!

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b) two! c) three! d) four! 4. Red!blood!cells!contain!the!enzyme!_______,!which!catalyzes!the!formation!of!carbonic!acid.! a) carbonic!anhydrase! b) carbon!dioxide!acidase! c) oxidase! d) catalase! 5. The!component!of!the!brain!that!either!stimulates!or!inhibits!neurons!in!the!medulla!oblongata!to! control!the!depth!and!rate!of!breathing!is!the:! a)! ventricle! b)! cerebellum! c)! cerebrum! d)! pons! e)! none!of!the!above!are!correct!

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6. State!the!3!mechanisms!by!which!carbon!dioxide!is!transported!in!the!body:![3]! i.!! As!bicarbonate!(70%)! !

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ii.!! Bind!to!globin!portion!of!hemoglobin!(23%)! !

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iii.! Dissolved!in!plasma! (7%)! !

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7. Indicate!whether!each!the!following!statements!is!true!(T)!or!false!(F)!by!circling!the!correct!letter![4]! i. During!rest,!expiration!is!an!active!process! ! ! ! ! ! !! T!/!F! ii. The!diaphragm!and!external!intercostal!muscles!play!a!role!in!inspiration! ! ! T!/!F! iii. In!the!tissues,!oxygen!moves!out!of!capillary!blood!into!cells! ! ! ! ! T!/!F! iv. In!the!alveoli,!carbon!dioxide!moves!from!the!air!sacs!into!capillaries! ! ! ! T!/!F! ! 8. State!2!causes!of!hypoxia.![2]! ! Too!many!causes!to!list!here.!Please!refer!to!slide!#44!of!the!lecture!powerpoint! ! ! 9. State!two!consequences!of!hyperventilation.![2]! ! Cyanosis,!Tachycardia,!Dizziness! ! ! ! ! ! ! ! 10. Choosing!four!from!the!following!five!terms,!label!A-D!in!the!figure!below:![4]! tidal!volume!(B),!Inspiratory!reserve!volume!(A),!residual!volume(D),!expiratory!reserve!volume(C),!dead! volume!

! Bonus&question&[1]:& In!the!figure!above,!air!that!does!not!participate!in!the!exchange!of!gases.!(D)!...