BMS300 Exam 3 Quiz UPDATED Exam
Questions and CORRECT Answers
True or false: The fluid between the layers of the mesothelium allows the heart to slide against
the body wall with reduced friction - CORRECT ANSWER - true
pericardium attached to the heart - CORRECT ANSWER - visceral pericardium
volume does not change, pressure increases - CORRECT ANSWER - isovolumetric
contraction
cells that line the inside of the heart and valves - CORRECT ANSWER - endothelial
volume does not change, pressure decreases - CORRECT ANSWER - isovolumetric
relaxation
Z-lines _______________ during ventricular contraction (systole) - CORRECT
ANSWER - shorten
Long term (months to years) increases in the pressure required to open the pulmonary valve
would be expected to increase the thickness of the myocardium in the: - CORRECT
ANSWER - right ventricle
What is the route of blood flow in a closed system? - CORRECT ANSWER - artery,
arteriole, capillary, venue, vein
The coronary arteries fill ______________. - CORRECT ANSWER - - during diastole
The stroke volume depends on: - CORRECT ANSWER - - end diastolic volume
- end systolic volume
, An increase in end diastolic volume (EDV): - CORRECT ANSWER - - an increase in
stroke volume
- an increase in ventricular contraction
What is the primary pacemaker of the heart? - CORRECT ANSWER - SA node
True or false: Cardiomyocytes are multinucleated like skeletal muscle cells - CORRECT
ANSWER - false
Where do contractile cardiomyocytes receive direct input from? - CORRECT ANSWER -
purkinje fibers
Cardiomyocytes communicate through ______________ and are anchored to one another by
_____________. - CORRECT ANSWER - gap junctions, desmosomes
The opening of which channel type begins depolarization in the SA and AV nodes? - CORRECT
ANSWER - HCN channels
Z-lines _______________ during ventricular contraction (systole). - CORRECT
ANSWER - shorten
When an AP arrives in contractile cardiomyocytes, _____________ passes through the
______________ receptor in the T-tubule. - CORRECT ANSWER - Ca2+, DHP
Once Ca2+ binds to the ______________ receptor, _____________ leaves the sarcoplasmic
reticulum. Choose the single best answer. - CORRECT ANSWER - ryanodine, Ca2+
At intercalated disks within the myocardium, conductile cells pass positive charge through
__________ to ____________ cells, causing systole. - CORRECT ANSWER - gap
junctions, contractile
Questions and CORRECT Answers
True or false: The fluid between the layers of the mesothelium allows the heart to slide against
the body wall with reduced friction - CORRECT ANSWER - true
pericardium attached to the heart - CORRECT ANSWER - visceral pericardium
volume does not change, pressure increases - CORRECT ANSWER - isovolumetric
contraction
cells that line the inside of the heart and valves - CORRECT ANSWER - endothelial
volume does not change, pressure decreases - CORRECT ANSWER - isovolumetric
relaxation
Z-lines _______________ during ventricular contraction (systole) - CORRECT
ANSWER - shorten
Long term (months to years) increases in the pressure required to open the pulmonary valve
would be expected to increase the thickness of the myocardium in the: - CORRECT
ANSWER - right ventricle
What is the route of blood flow in a closed system? - CORRECT ANSWER - artery,
arteriole, capillary, venue, vein
The coronary arteries fill ______________. - CORRECT ANSWER - - during diastole
The stroke volume depends on: - CORRECT ANSWER - - end diastolic volume
- end systolic volume
, An increase in end diastolic volume (EDV): - CORRECT ANSWER - - an increase in
stroke volume
- an increase in ventricular contraction
What is the primary pacemaker of the heart? - CORRECT ANSWER - SA node
True or false: Cardiomyocytes are multinucleated like skeletal muscle cells - CORRECT
ANSWER - false
Where do contractile cardiomyocytes receive direct input from? - CORRECT ANSWER -
purkinje fibers
Cardiomyocytes communicate through ______________ and are anchored to one another by
_____________. - CORRECT ANSWER - gap junctions, desmosomes
The opening of which channel type begins depolarization in the SA and AV nodes? - CORRECT
ANSWER - HCN channels
Z-lines _______________ during ventricular contraction (systole). - CORRECT
ANSWER - shorten
When an AP arrives in contractile cardiomyocytes, _____________ passes through the
______________ receptor in the T-tubule. - CORRECT ANSWER - Ca2+, DHP
Once Ca2+ binds to the ______________ receptor, _____________ leaves the sarcoplasmic
reticulum. Choose the single best answer. - CORRECT ANSWER - ryanodine, Ca2+
At intercalated disks within the myocardium, conductile cells pass positive charge through
__________ to ____________ cells, causing systole. - CORRECT ANSWER - gap
junctions, contractile
