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Which chamber of the heart has the thickest myocardial layer?
left ventricle
Which ventricle pushes blood to the aorta?
left ventricle
Which ventricle pushes blood to the pulmonary artery?
right ventricle
What structure of the heart collects blood and pushes it into the right ventricle?
right atrium
Which side of the heart deals with oxygen poor blood?
right
What is the primary function of the heart?
maintain adequate blood flow
Which chamber of the heart receives deoxygenated blood from the body through the vena cavas or coronary sinus?
right atrium
Which chamber of the heart receives deoxygenated blood from the right atrium and sends it to the lungs via the pulmonary trunk?
right ventricle
Which chamber of the heart receives oxygenated blood from the lungs via pulmonary veins?
left atrium
Which chamber of the heart receives oxygenated blood from left atrium via the left atrioventricular orifice and sends it to the body via aorta?
left ventricle
What vessels supply the heart tissue/muscle with blood?
coronary arteries
In which coronary artery is a blockage most damaging?
left anterior descending artery (LAD)
Coronary arteries branch off of the _________.
aorta
AV valves are the valves between…
atriums and ventricles
What controls the opening/closing of valves in the heart?
pressure gradients!!!!!!!!!!! NOT MUSCLE contractions
Which valve is between the right atrium and right ventricle?
tricuspid valve
Which valve is between the left atrium and left ventricle?
bicuspid/ mitral valve
Which valve is between the right ventricle and pulmonary artery?
pulmonary valve
Which valve is between the left ventricle and aorta?
aortic valve
If 90 ml of blood was pushed out of the left right of the heart, how many would be pushed out of the right side?
90 ml (left and right side occur at the same time)
What layer of the heart is made up of cardiac myocytes and the thickest layer of the heart in general?
myocardium
What is the innermost layer of the heart wall?
endocardium
What is the outermost layer of the heart wall?
epicardium
What is the function of the fluid in sack of the pericardium?
allows for smooth contraction, like oil in a car
What type of junctions are found at intercalated disks?
gap
What are the function of gap junctions in cardiac muscle?
allow for rapid depolarization
Depolarization of cardiac muscle causes what type of calcium channels to be activated?
L-type Ca²+
Once contraction is over, how do we get calcium out of the cell?
pump back into SR
Ca ATPase
Na/Ca exchanger
A 45-year old male develops a stenosis in his tricuspid valve which decreases blood flow through the valve. Where will blood accumulate in his patient?
right atrium
What defects are holes in muscle between atrias or ventricles?
septal defects
During fetal development, if the hole between your pulmonary artery and aorta doesn’t close what condition do you have?
patent ductus arteriosus
Note
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