ESS 345 EXAM 3 REVIEW EXAM QUESTIONS AND
ANSWERS
what chamber of the heart flows into the ventricle?
left/right atrium
draw an ECG signal and Label all depolarizations and re polarizations.
list 3 differences between cardiac and skeletal muscle.
- cardiac have intercalated discs, 1 nucleus, small/short branches, involuntary
- skeletal are long unbranched, multi nucleated, voluntary
Draw and label the pathway of blood through the heart (vena cava to aorta)
vena cava - right atrium - tricuspid valve - right ventricle - pulmonary artery - pulmonary
vein - left atrium - mitral valve - left ventricle - aorta
what do you name the volume of air inspired and expired during normal relaxed
breathing?
tidal volume
what percentage of atmospheric air is composed of CO2?
0.03%
which gas has lower diffusion constant?
CO2, more easily diffuses across membrane
explain inspiration (pressure, volume, diaphragm, air, movement)
diaphragm contracts (descends) which decreases intrapulmonary pressure and
increases volume, air into the lungs
ANSWERS
what chamber of the heart flows into the ventricle?
left/right atrium
draw an ECG signal and Label all depolarizations and re polarizations.
list 3 differences between cardiac and skeletal muscle.
- cardiac have intercalated discs, 1 nucleus, small/short branches, involuntary
- skeletal are long unbranched, multi nucleated, voluntary
Draw and label the pathway of blood through the heart (vena cava to aorta)
vena cava - right atrium - tricuspid valve - right ventricle - pulmonary artery - pulmonary
vein - left atrium - mitral valve - left ventricle - aorta
what do you name the volume of air inspired and expired during normal relaxed
breathing?
tidal volume
what percentage of atmospheric air is composed of CO2?
0.03%
which gas has lower diffusion constant?
CO2, more easily diffuses across membrane
explain inspiration (pressure, volume, diaphragm, air, movement)
diaphragm contracts (descends) which decreases intrapulmonary pressure and
increases volume, air into the lungs
