BIO 235 FINAL EXAM QUESTIONS AND ANSWER1.

BIO 235 FINAL EXAM QUESTIONS
AND ANSWERS



Venous0blood0returning0from0systemic0circulation0first0enters0the0___,0proceeds0to0the
0____,0loses0___and0gains0____0in0the0lungs,0and0then0returns0to0the0heart0via0the0__
__.

a)0right0atrium,0right0ventricle,0pulmonary0artery,0CO2,0O2,0pulmonary0veins.
b)0Left0atrium,0left0ventricle,0pulmonary0artery,0CO2,0O2,0aorta
c)Right0atrium,0right0ventricle,0pulmonary0artery,0O2,0CO2,0pulmonary0veins
d)0Left0atrium,0right0ventricle,0pulmonary0veins,0O2,0CO2,0aorta0-
0ans✔A.0Right0atrium,0right0ventricle,0pulmonary0artery,0CO2,0O2,0pulmonary0veins


The0upper0respiratory0tract0differs0from0the0lower0respiratory0tract0in0what0way?
A)0air0is0taken0in0through0the0lower0respiratory0tract,0and0CO2/
O20are0exchanged0in0the0upper0respiratory0tract
b)0air0is0taken0in0through0the0upper0respiratory0tract,0and0CO2/
O20are0exchanged0in0the0lower0respiratory0tract
c)0CO20is0removed0from0circulation0in0the0upper0respiratory0tract
d)0O20is0removed0from0circulation0in0the0lower0respiratory0tract0-
0ans✔B.0Air0is0taken0in0through0the0upper0respiratory0tract,0and0CO2/
O20are0exchanged0in0the0lower0respiratory0tract

Smooth0muscle0surrounds0which0structure0of0the0lower0respiratory0tract?
a)0Alveoli
b)0Alveolar0capillaries
c)0Terminal0bronchioles
d)0Trachea0-0ans✔C.0terminal0bronchioles

In0the0alveolus,0____squamous0epithelial0cells0are0responsible0for0___,0while0___cells
0are0responsible0for0____.
a)0Type01;0surfactant0secretion;0Type02,0gas0exchange
b)0type01;0debris0removal;0type02;0surfactant0secretion
c)0type03;0debris0removal;0type01;0gas0exchange
d)0type01;0gas0exchange;0type02:0surfactant0secretion0-
0ans✔d)0type01;0gas0exchange;0type02:0surfactant0secretion


There0is0no0net0air0flow0into0or0out0of0the0lungs0when

,a)0P0alveolus0=0P0atmostpher
b)0P0alveolus<0P0atmostphere
c)0P0pleural0wall0>0P0atmostphere
d)0P0atmosphere<0P0pleural0wall0-0ans✔a)0P0alveolus0=0P0atmosphere

What0keeps0the0lungs0from0collapsing

Check0the0-
0ans✔b)0trans0pulmonary0negative0pressure0caused0by0negative0pressure0from0pleural
0cavity


Identify0the0correct0sequence0of0events0for0inspiration
a)0diaphragm0&0inspiratory0intercostals0relax,0lungs0expand,0air0flows0into0alveoli
b)0diaphragm0&0inspiratory0intercostals0contract;0lungs0expand,0air0flows0out0of0the0alv
eoli
c)0diaphragm0&0inspiratory0intercostals0contract,0lungs0expand,0air0flows0into0alveoli
d)diaphragm0&0expiratory0intercostals0relax,0lungs0contract,0air0flows0out0of0alveoli0-
0ans✔c)0diaphragm0&0inspiratory0intercostals0contract,0lungs0expand,0air0flows0into0alv
eoli

the0main0determiners0of0lung0compliance0are
a)0lung0tissue0thickness,0surface0tension0of0fluid0on0the0inner0lung0surface
b)0lung0tissue0perforations,0surface0tension0of0fluid0on0the0inner0lung0surface
c)0lung0tissue0surface0area,0surface0tension0of0fluid0on0the0inner0lung0surface
d)0lung0tissue0thickness,0surface0tension0of0fluid0on0the0outer0lung0surface0-
0ans✔a)0lung0tissue0thickness,0surface0tension0of0fluid0on0the0inner0lung0surface


lung0compliance0is0defined0as0
a)0lung0volume/0transpulmonary0pressure
b)0transpulmonary0pressure/0lung0volume
c)0transthoracic0pressure/0atmospheric0pressure
d)0none0of0the0above0-0ans✔d)0none0of0the0above

trained0athletes0tend0to0have0
a)0increased0lung0compliance
b)0normal0lung0compliance
c)0decreased0lung0compliance
d)0asthma0-0ans✔a)0increased0lung0compliance

which0is0true0abbout0the0pleural0sac
a)it0is0continuous0with0the0atmosphere0and0protects0the0lungs0from0infections
b)0it0is0a0closed0sac0surrounding0each0lung0and0contains0only0a0tiny0volume0of0lubrica
ting0fluid
c)0it0is0a0closed0sac0surrounding0each0lung0and0contain0a0large0volume0of0surfactact
d)0it0is0a0closed,0air-
filled0space0surrounding0both0lungs0that0has0a0negative0pressure0compared0to0atmosp

, heric0pressure0-
0ans✔b)0it0is0a0closed0sac0surrounding0each0lung0and0contains0only0a0tiny0volume0of0l
ubricating0fluid

which0structure0is0NOT0part0of0the0"anatomical0dead0space?"
a)0bronchiole
b)0trachea
c)0bronchus
d)respiratory0bronchiole0-0ans✔d)respiratory0bronchiole

the0volume0of0air0flowing0into0the0alveoli0during0inhalation/
inspiration0is0increased0when0there0is0an0increase0in0which0of0these?
a)air0resistance
b)the0pressure0gradiant0from0the0atmosphere0to0the0alveoli
c)0the0pressure0in0the0intrapleural0space
d)0the0curvature0of0the0diaphragm0-
0ans✔b)the0pressure0gradiant0from0the0atmosphere0to0the0alveoli


under0normal0circumstances,0which0of0the0following0would0result0from0an0increase0in0t
ranspulmonary0pressure?
a)0inhalation/inspiration
b)0exhalation/expiration
c)0a0collapsed0lung
d)0emphysema0-0ans✔a)0inhalation/inspiration

which0of0the0following0statements0about0the0response0of0arteriole0smooth0muscle0to0c
hanging0ocygen0partial0pressure0is0true?
a)0both0systemic0and0pulmonary0arterioles0respond0to0a0decrease0in0PO20by0constricti
ng
b)0both0systemic0and0pulmonary0arterioles0respond0to0a0decrease0in0PO20by0dilating
c)0systemic0arterioles0respond0to0a0decrease0in0PO20by0dilating0but0pulmonary0arteriol
es0constrict0in0response0to0decreased0PO
d)0systemic0arterioles0respond0to0a0decrease0in0PO20by0constricting0but0pulmonary0art
erioles0dilate0in0response0to0decreased0PO20-
0ans✔c)0systemic0arterioles0respond0to0a0decrease0in0PO20by0dilating0but0pulmonary0
arterioles0constrict0in0response0to0decreased0PO

during0an0unforced0exhalation/expiration,0which0would0NOT0be0true?
a)0alveolar0pressure0is0greater0than0atmospheric0pressure
b)0intrapleural0pressure0is0greater0than0alveolar0pressure
c)0intrapleural0pressure0becomes0less0negative
d)0the0diaphragm0relaxes0-
0ans✔b)0intrapleural0pressure0is0greater0than0alveolar0pressure


which0true0regarding0how0gases0dissolve0in0liquids?