Test bank for ECGs Made Easy
7th Edition by Barbara J Aehlert ECGs Made Easy 7th Edition by Barbara Aehlert Test Bank
Table of Contents:
Chapters 1 - 10
Chapter 1. Anatomy & Physiology
Chapter 2. Basic Electrophysiology
Chapter 3. Sinus Mechanisms
Chapter 4. Atrial Rhythms
Chapter 5. Junctional Rhythms
Chapter 6. Ventricular Rhythms
Chapter 7. Atrioventricular Blocks
Chapter 8. Pacemaker Rhythms
Chapter 9. Introduction to the 12-Lead ECG
Chapter 10. Post-Test
,Chapter 01: Anatomy and Physiology
Aehlert: ECGs Made Easy, 7th Edition OBJ: Identify and explain the components of blood pressure and cardiac output.
5. The right atrium receives venous blood from the head, neck, and thorax via the , from
MULTIPLE CHOICE the remainder of the body via the , and from the heart via the .
a. coronary sinus; superior vena cava; inferior vena cava
1. The apex of the heart is formed by the . b. superior vena cava; coronary sinus; inferior vena cava
a. tip of the left ventricle c. inferior vena cava; superior vena cava; coronary sinus
b. tip of the right atrium d. superior vena cava; inferior vena cava; coronary sinus
c. right atrium and right ventricle
ANSWER: D
d. left atrium and left ventricle The right atrium receives blood low in oxygen from the superior vena cava, which carries
ANSWER: A blood from the head and upper extremities; the inferior vena cava, which carries blood from
The heart’s apex, or lower portion, is formed by the tip of the left ventricle. The apex lies just the lower body; and the coronary sinus, which is the largest vein that drains the heart.
above the diaphragm, between the fifth and sixth ribs, in the midclavicular line.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
OBJ: Identify the surfaces of the heart.
6. The heart is divided into chambers but functions as a -sided pump.
2. The left atrium receives blood from the . a. two; four
a. pulmonary veins b. three; two
b. aorta c. four; two
c. pulmonary arteries d. four; three
d. inferior vena cava
ANSWER: C
ANSWER: A The heart has four chambers: two atria and two ventricles. The right and left sides of the heart
The left atrium receives freshly oxygenated blood from the lungs via the right and left are separated by an internal wall of connective tissue called a septum. The interatrial septum
pulmonary veins. separates the right and left atria. The interventricular septum separates the right and left
ventricles. The septa separate the heart into two functional pumps. The right atrium and right
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each. ventricle make up one pump. The left atrium and left ventricle make up the other.
3. The anterior surface of the heart consists primarily of the . OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
a. left atrium
b. right atrium 7. Stimulation of alpha1 receptors results in .
c. left ventricle a. increased heart rate
d. right ventricle b. peripheral vasoconstriction
c. constriction of bronchial smooth muscle
ANSWER: D d. increased force of myocardial contraction
The front (anterior) surface of the heart lies behind the sternum and costal cartilages. It is
formed by portions of the right atrium and the left and right ventricles. However, because the ANSWER: B
heart is tilted slightly toward the left in the chest, the right ventricle is the area of the heart that Alpha1 receptors are found in the eyes, blood vessels, bladder, and male reproductive organs.
lies most directly behind the sternum. Stimulation of alpha1 receptor sites results in constriction.
OBJ: Identify the surfaces of the heart. OBJ: Compare and contrast the effects of sympathetic and parasympathetic stimulation of the heart.
4. Blood pressure is determined by multiplied by . 8. Which side of the heart is a low-pressure system that pumps venous blood to the lungs?
a. stroke volume; heart rate a. Left
b. heart rate; cardiac output b. Right
c. cardiac output; peripheral vascular resistance
ANSWER: B
d. stroke volume; peripheral vascular resistance The job of the right side of the heart is to pump unoxygenated blood to and through the lungs
ANSWER: C to the left side of the heart. This is called the pulmonary circulation. The right side of the heart
Blood pressure is equal to cardiac output multiplied by peripheral vascular resistance. is a low-pressure system.
, Whencthecventriclesccontract,cthecpulmoniccandcaorticcvalvescopen,callowingcbloodctocflowcoutcof
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each. cthecventricles.
9. Which side of the heart is a high-pressure system that pumps arterial blood to the systemic OBJ:cNamecandcidentifyctheclocationcofcthecatrioventricularc(AV)candcsemilunarc(SL)cvalves.
circulation?
a. Left 13. Thecbasecofcthecheartciscfoundcatcapproximatelyctheclevelcofcthe rib(s).
b. Right a. first
b. second
ANSWER: A
c. fourth
The left side of the heart is a high-pressure pump. The job of the left heart is to receive d. fifthcandcsixth
oxygenated blood and pump it out to the rest of the body. This is called the systemic
circulation. The left ventricle is a high-pressure chamber. Its wall is much thicker than the ANSWER:c B
right ventricle (the right ventricle is 3 to 5 mm thick; the left ventricle is 13 to 15 mm thick). Thecbasecofcthecheartciscitscuppercportioncandciscformedcmainlycbycthecleftcatrium,cwithcacsmallcam
This is because the left ventricle must overcome a lot of pressure and resistance from the ountcofcrightcatrium.cItcliescatcapproximatelyctheclevelcofcthecsecondcrib,cimmediatelycincfrontcofct
arteries and contract forcefully in order to pump blood out to the body. hecesophaguscandcdescendingcaorta.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each. OBJ:c Identifycthecsurfacescofcthecheart.
10. The thick, muscular middle layer of the heart wall that contains the atrial and ventricular 14. Whichcofcthecfollowingcarecsemilunarcvalves?
muscle fibers necessary for contraction is the . a. Aorticcandcpulmonic
a. epicardium b. Aorticcandctricuspid
b. pericardium c. Pulmoniccandcmitral
c. myocardium d. Tricuspidcandcmitral
d. endocardium
ANSWER:c A
ANSWER: C Thecpulmoniccandcaorticcvalvescarecsemilunarc(SL)cvalves.cThecsemilunarcvalvescpreventcb
The myocardium (middle layer) is a thick, muscular layer that consists of cardiac muscle ackflowcofcbloodcfromcthecaortacandcpulmonarycarteriescintocthecventricles.
fibers (cells) responsible for the pumping action of the heart.
OBJ:cNamecandcidentifyctheclocationcofcthecatrioventricularc(AV)candcsemilunarc(SL)cvalves.
OBJ: Describe the structure and function of the coverings of the heart.
15. Bloodcleavescthecleftcventriclecthroughcthe
11. Blood flows from the right atrium through the valve into the right ventricle. valvectocthecaortacandcitscbranchescandciscd
a. mitral istributedcthroughoutcthecbody.
b. aortic a. mitral
c. pulmonic b. aortic
d. tricuspid c. pulmonic
d. tricuspid
ANSWER: D
Blood flows from the right atrium through the tricuspid valve into the right ventricle. ANSWER:c B
Whencthecleftcventricleccontracts,cfreshlycoxygenatedcbloodcflowscthroughcthecaorticcvalvecintocth
OBJ: Beginning with the right atrium, describe blood flow through the normal heart and lungs to the ecaortacandcoutctocthecbody.
systemic circulation.
OBJ:cBeginningcwithcthecrightcatrium,cdescribecbloodcflowcthroughcthecnormalcheartcandclungsctocthecs
12. Rapid ejection of blood from the ventricular chambers of the heart occurs because the ystemicccirculation.
and valves open.
a. pulmonic; aortic 16. Bloodcflowscfromcthecleftcatriumcthroughcthe valvecintocthecleftcventricle.
b. tricuspid; mitral a. mitral
c. pulmonic; mitral b. aortic
d. tricuspid; aortic c. pulmonic
d. tricuspid
ANSWER: A
ANSWER:c A
Bloodcflowscfromcthecleftcatriumcthroughcthecmitralc(bicuspid)cvalvecintocthecleftcventricle.
, Beta2creceptorcsitescarecfoundcincthecarteriolescofcthecheart,clungs,candcskeletalcmuscle.cStimulatio
OBJ:cBeginningcwithcthecrightcatrium,cdescribecbloodcflowcthroughcthecnormalcheartcandclungsctocthecs ncresultscincdilation.cStimulationcofcbeta2creceptorcsitescincthecsmoothcmusclecofcthecbronchicresultsc
ystemicccirculation. incdilation.
17. Thecrightcventriclecexpelscbloodcthroughcthe valvecintocthecpulmonaryctrunk. OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
a. mitral
b. aortic 21. Chronotropycrefersctocanceffectcon .
c. pulmonic a. heartcrate
d. tricuspid b. forcecofccontraction
c. bronchialcsmoothcmuscle
ANSWER:c C
d. speedcofcconductioncthroughcthecatrioventricularcnode
Thecrightcventriclecexpelscthecbloodcthroughcthecpulmoniccvalvecintocthecpulmonaryctrunk.cThecp
ulmonaryctrunkcdividescintocacrightcandcleftcpulmonarycartery,ceachcofcwhichccarriescbloodctoconec ANSWER:c A
lungc(pulmonaryccircuit). Chronocrefersctocrate.cChronotropicceffectcrefersctocacchangecincheartcrate.cPositivecchronotrop
icceffectcrefersctocancincreasecincheartcrate.cNegativecchronotropicceffectcrefersctocacdecreasecinch
OBJ:cBeginningcwithcthecrightcatrium,cdescribecbloodcflowcthroughcthecnormalcheartcandclungsctocthecs eartcrate.
ystemicccirculation.
OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
18. Thecprimarycneurotransmitterscofcthecsympatheticcdivisioncofcthecautonomiccnervouscsystemca
re . 22. Thecleftcmainccoronarycarterycdividescintocthe branches.
a. dopaminecandcacetylcholine a. marginalcandccircumflex
b. muscarinecandcnorepinephrine b. marginalcandcanteriorcdescending
c. acetylcholinecandcepinephrine c. anteriorcandcposteriorcdescending
d. norepinephrinecandcepinephrine d. anteriorcinterventricularcarterycdescendingcandccircumflex
ANSWER:c D ANSWER:c D
Whencsympatheticcnervescarecstimulated,cthecneurotransmitterscnorepinephrinecandce Thecleftcmainccoronarycarterycsuppliescoxygenatedcbloodctocitsctwocprimarycbranches:cthecleftcan
pinephrinecarecreleased. teriorcdescendingc(LAD)c(alsoccalledcthecanteriorcinterventricular)carterycandctheccircumflexca
rteryc(CX).
OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
OBJ:cNamecthecprimarycbranchescandcareascofcthecheartcsuppliedcbycthecrightcandcleftccoronarycar
19. Completecocclusioncofcthe teries.
coronarycartery,calsocreferredctocascthecwidowcmaker,cusuallycr
esultscincsuddencdeath. 23. Thecprimarycneurotransmittercofcthecparasympatheticcdivisioncofcthecautonomiccnervouscs
a. right ystemcis .
b. leftcmain a. dopamine
c. circumflex b. muscarine
d. leftcanteriorcdescending c. acetylcholine
d. norepinephrine
ANSWER:c B
Completecocclusioncofcthecleftcmainccoronarycartery,calsocreferredctocascthecwidowcmaker,cusuallycr ANSWER:c C
esultscincsuddencdeath. Acetylcholinec(Ach)ciscacchemicalcmessengerc(neurotransmitter)creleasedcwhencp
arasympatheticcnervescarecstimulated.cAchcbindsctocparasympatheticcreceptors.
OBJ:cNamecthecprimarycbranchescandcareascofcthecheartcsuppliedcbycthecrightcandcleftccoronarycar
teries. OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
20. Stimulationcofcbeta2creceptorcsitescresultscin . 24. The arterycsuppliescthecrightcatriumcandcventriclecwithcblood.
a. increasedcheartcrate a. rightccoronary
b. peripheralcvasoconstriction b. leftcmainccoronary
c. constrictioncofcrenalcbloodcvessels c. leftccircumflex
d. dilationcofcbronchialcsmoothcmuscle d. leftcanteriorcdescending
ANSWER:c D
7th Edition by Barbara J Aehlert ECGs Made Easy 7th Edition by Barbara Aehlert Test Bank
Table of Contents:
Chapters 1 - 10
Chapter 1. Anatomy & Physiology
Chapter 2. Basic Electrophysiology
Chapter 3. Sinus Mechanisms
Chapter 4. Atrial Rhythms
Chapter 5. Junctional Rhythms
Chapter 6. Ventricular Rhythms
Chapter 7. Atrioventricular Blocks
Chapter 8. Pacemaker Rhythms
Chapter 9. Introduction to the 12-Lead ECG
Chapter 10. Post-Test
,Chapter 01: Anatomy and Physiology
Aehlert: ECGs Made Easy, 7th Edition OBJ: Identify and explain the components of blood pressure and cardiac output.
5. The right atrium receives venous blood from the head, neck, and thorax via the , from
MULTIPLE CHOICE the remainder of the body via the , and from the heart via the .
a. coronary sinus; superior vena cava; inferior vena cava
1. The apex of the heart is formed by the . b. superior vena cava; coronary sinus; inferior vena cava
a. tip of the left ventricle c. inferior vena cava; superior vena cava; coronary sinus
b. tip of the right atrium d. superior vena cava; inferior vena cava; coronary sinus
c. right atrium and right ventricle
ANSWER: D
d. left atrium and left ventricle The right atrium receives blood low in oxygen from the superior vena cava, which carries
ANSWER: A blood from the head and upper extremities; the inferior vena cava, which carries blood from
The heart’s apex, or lower portion, is formed by the tip of the left ventricle. The apex lies just the lower body; and the coronary sinus, which is the largest vein that drains the heart.
above the diaphragm, between the fifth and sixth ribs, in the midclavicular line.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
OBJ: Identify the surfaces of the heart.
6. The heart is divided into chambers but functions as a -sided pump.
2. The left atrium receives blood from the . a. two; four
a. pulmonary veins b. three; two
b. aorta c. four; two
c. pulmonary arteries d. four; three
d. inferior vena cava
ANSWER: C
ANSWER: A The heart has four chambers: two atria and two ventricles. The right and left sides of the heart
The left atrium receives freshly oxygenated blood from the lungs via the right and left are separated by an internal wall of connective tissue called a septum. The interatrial septum
pulmonary veins. separates the right and left atria. The interventricular septum separates the right and left
ventricles. The septa separate the heart into two functional pumps. The right atrium and right
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each. ventricle make up one pump. The left atrium and left ventricle make up the other.
3. The anterior surface of the heart consists primarily of the . OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each.
a. left atrium
b. right atrium 7. Stimulation of alpha1 receptors results in .
c. left ventricle a. increased heart rate
d. right ventricle b. peripheral vasoconstriction
c. constriction of bronchial smooth muscle
ANSWER: D d. increased force of myocardial contraction
The front (anterior) surface of the heart lies behind the sternum and costal cartilages. It is
formed by portions of the right atrium and the left and right ventricles. However, because the ANSWER: B
heart is tilted slightly toward the left in the chest, the right ventricle is the area of the heart that Alpha1 receptors are found in the eyes, blood vessels, bladder, and male reproductive organs.
lies most directly behind the sternum. Stimulation of alpha1 receptor sites results in constriction.
OBJ: Identify the surfaces of the heart. OBJ: Compare and contrast the effects of sympathetic and parasympathetic stimulation of the heart.
4. Blood pressure is determined by multiplied by . 8. Which side of the heart is a low-pressure system that pumps venous blood to the lungs?
a. stroke volume; heart rate a. Left
b. heart rate; cardiac output b. Right
c. cardiac output; peripheral vascular resistance
ANSWER: B
d. stroke volume; peripheral vascular resistance The job of the right side of the heart is to pump unoxygenated blood to and through the lungs
ANSWER: C to the left side of the heart. This is called the pulmonary circulation. The right side of the heart
Blood pressure is equal to cardiac output multiplied by peripheral vascular resistance. is a low-pressure system.
, Whencthecventriclesccontract,cthecpulmoniccandcaorticcvalvescopen,callowingcbloodctocflowcoutcof
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each. cthecventricles.
9. Which side of the heart is a high-pressure system that pumps arterial blood to the systemic OBJ:cNamecandcidentifyctheclocationcofcthecatrioventricularc(AV)candcsemilunarc(SL)cvalves.
circulation?
a. Left 13. Thecbasecofcthecheartciscfoundcatcapproximatelyctheclevelcofcthe rib(s).
b. Right a. first
b. second
ANSWER: A
c. fourth
The left side of the heart is a high-pressure pump. The job of the left heart is to receive d. fifthcandcsixth
oxygenated blood and pump it out to the rest of the body. This is called the systemic
circulation. The left ventricle is a high-pressure chamber. Its wall is much thicker than the ANSWER:c B
right ventricle (the right ventricle is 3 to 5 mm thick; the left ventricle is 13 to 15 mm thick). Thecbasecofcthecheartciscitscuppercportioncandciscformedcmainlycbycthecleftcatrium,cwithcacsmallcam
This is because the left ventricle must overcome a lot of pressure and resistance from the ountcofcrightcatrium.cItcliescatcapproximatelyctheclevelcofcthecsecondcrib,cimmediatelycincfrontcofct
arteries and contract forcefully in order to pump blood out to the body. hecesophaguscandcdescendingcaorta.
OBJ: Identify and describe the chambers of the heart and the vessels that enter or leave each. OBJ:c Identifycthecsurfacescofcthecheart.
10. The thick, muscular middle layer of the heart wall that contains the atrial and ventricular 14. Whichcofcthecfollowingcarecsemilunarcvalves?
muscle fibers necessary for contraction is the . a. Aorticcandcpulmonic
a. epicardium b. Aorticcandctricuspid
b. pericardium c. Pulmoniccandcmitral
c. myocardium d. Tricuspidcandcmitral
d. endocardium
ANSWER:c A
ANSWER: C Thecpulmoniccandcaorticcvalvescarecsemilunarc(SL)cvalves.cThecsemilunarcvalvescpreventcb
The myocardium (middle layer) is a thick, muscular layer that consists of cardiac muscle ackflowcofcbloodcfromcthecaortacandcpulmonarycarteriescintocthecventricles.
fibers (cells) responsible for the pumping action of the heart.
OBJ:cNamecandcidentifyctheclocationcofcthecatrioventricularc(AV)candcsemilunarc(SL)cvalves.
OBJ: Describe the structure and function of the coverings of the heart.
15. Bloodcleavescthecleftcventriclecthroughcthe
11. Blood flows from the right atrium through the valve into the right ventricle. valvectocthecaortacandcitscbranchescandciscd
a. mitral istributedcthroughoutcthecbody.
b. aortic a. mitral
c. pulmonic b. aortic
d. tricuspid c. pulmonic
d. tricuspid
ANSWER: D
Blood flows from the right atrium through the tricuspid valve into the right ventricle. ANSWER:c B
Whencthecleftcventricleccontracts,cfreshlycoxygenatedcbloodcflowscthroughcthecaorticcvalvecintocth
OBJ: Beginning with the right atrium, describe blood flow through the normal heart and lungs to the ecaortacandcoutctocthecbody.
systemic circulation.
OBJ:cBeginningcwithcthecrightcatrium,cdescribecbloodcflowcthroughcthecnormalcheartcandclungsctocthecs
12. Rapid ejection of blood from the ventricular chambers of the heart occurs because the ystemicccirculation.
and valves open.
a. pulmonic; aortic 16. Bloodcflowscfromcthecleftcatriumcthroughcthe valvecintocthecleftcventricle.
b. tricuspid; mitral a. mitral
c. pulmonic; mitral b. aortic
d. tricuspid; aortic c. pulmonic
d. tricuspid
ANSWER: A
ANSWER:c A
Bloodcflowscfromcthecleftcatriumcthroughcthecmitralc(bicuspid)cvalvecintocthecleftcventricle.
, Beta2creceptorcsitescarecfoundcincthecarteriolescofcthecheart,clungs,candcskeletalcmuscle.cStimulatio
OBJ:cBeginningcwithcthecrightcatrium,cdescribecbloodcflowcthroughcthecnormalcheartcandclungsctocthecs ncresultscincdilation.cStimulationcofcbeta2creceptorcsitescincthecsmoothcmusclecofcthecbronchicresultsc
ystemicccirculation. incdilation.
17. Thecrightcventriclecexpelscbloodcthroughcthe valvecintocthecpulmonaryctrunk. OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
a. mitral
b. aortic 21. Chronotropycrefersctocanceffectcon .
c. pulmonic a. heartcrate
d. tricuspid b. forcecofccontraction
c. bronchialcsmoothcmuscle
ANSWER:c C
d. speedcofcconductioncthroughcthecatrioventricularcnode
Thecrightcventriclecexpelscthecbloodcthroughcthecpulmoniccvalvecintocthecpulmonaryctrunk.cThecp
ulmonaryctrunkcdividescintocacrightcandcleftcpulmonarycartery,ceachcofcwhichccarriescbloodctoconec ANSWER:c A
lungc(pulmonaryccircuit). Chronocrefersctocrate.cChronotropicceffectcrefersctocacchangecincheartcrate.cPositivecchronotrop
icceffectcrefersctocancincreasecincheartcrate.cNegativecchronotropicceffectcrefersctocacdecreasecinch
OBJ:cBeginningcwithcthecrightcatrium,cdescribecbloodcflowcthroughcthecnormalcheartcandclungsctocthecs eartcrate.
ystemicccirculation.
OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
18. Thecprimarycneurotransmitterscofcthecsympatheticcdivisioncofcthecautonomiccnervouscsystemca
re . 22. Thecleftcmainccoronarycarterycdividescintocthe branches.
a. dopaminecandcacetylcholine a. marginalcandccircumflex
b. muscarinecandcnorepinephrine b. marginalcandcanteriorcdescending
c. acetylcholinecandcepinephrine c. anteriorcandcposteriorcdescending
d. norepinephrinecandcepinephrine d. anteriorcinterventricularcarterycdescendingcandccircumflex
ANSWER:c D ANSWER:c D
Whencsympatheticcnervescarecstimulated,cthecneurotransmitterscnorepinephrinecandce Thecleftcmainccoronarycarterycsuppliescoxygenatedcbloodctocitsctwocprimarycbranches:cthecleftcan
pinephrinecarecreleased. teriorcdescendingc(LAD)c(alsoccalledcthecanteriorcinterventricular)carterycandctheccircumflexca
rteryc(CX).
OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
OBJ:cNamecthecprimarycbranchescandcareascofcthecheartcsuppliedcbycthecrightcandcleftccoronarycar
19. Completecocclusioncofcthe teries.
coronarycartery,calsocreferredctocascthecwidowcmaker,cusuallycr
esultscincsuddencdeath. 23. Thecprimarycneurotransmittercofcthecparasympatheticcdivisioncofcthecautonomiccnervouscs
a. right ystemcis .
b. leftcmain a. dopamine
c. circumflex b. muscarine
d. leftcanteriorcdescending c. acetylcholine
d. norepinephrine
ANSWER:c B
Completecocclusioncofcthecleftcmainccoronarycartery,calsocreferredctocascthecwidowcmaker,cusuallycr ANSWER:c C
esultscincsuddencdeath. Acetylcholinec(Ach)ciscacchemicalcmessengerc(neurotransmitter)creleasedcwhencp
arasympatheticcnervescarecstimulated.cAchcbindsctocparasympatheticcreceptors.
OBJ:cNamecthecprimarycbranchescandcareascofcthecheartcsuppliedcbycthecrightcandcleftccoronarycar
teries. OBJ:c Comparecandccontrastctheceffectscofcsympatheticcandcparasympatheticcstimulationcofcthecheart.
20. Stimulationcofcbeta2creceptorcsitescresultscin . 24. The arterycsuppliescthecrightcatriumcandcventriclecwithcblood.
a. increasedcheartcrate a. rightccoronary
b. peripheralcvasoconstriction b. leftcmainccoronary
c. constrictioncofcrenalcbloodcvessels c. leftccircumflex
d. dilationcofcbronchialcsmoothcmuscle d. leftcanteriorcdescending
ANSWER:c D
