LABS / Integrated questions
2020 paper
17. When comparing the type of blood and the likely pressure ranges inside the
structure:
Brachiocephalic artery = oxygenated blood= ~5-120 mmHg
Incorrect. Minimum pressure of the brachiocephalic artery would be the same as
diastolic pressure of ~80 mmHg. This is because the brachiocephalic artery is
continuous with the aorta. Blood only enters the aorta once ventricular pressure
has exceeded diastolic pressure of 80 mmHg. However, the value of 120 mmHg
maximum pressure is correct as this is the maximum pressure of blood
experienced by the aorta from the left ventricle.
Corrected statement: Brachiocephalic artery = oxygenated blood = ~80-120
mmHg.
18. Pulmonary vein = deoxygenated blood = ~5-25 mmHg
pulmonary veins drain oxygenated blood back to the left atrium from the lungs
have a pressure range of ~2-8mmHg, therefore the entire statement is
INCORRECT.
19. Pulmonary artery = oxygenated blood = ~2-8 mmHg
Incorrect: Pulmonary artery is deoxygenated with a blood pressure range of 10-27
mmHg
20. Left ventricle = oxygenated blood = ~80-120 mmHg
Incorrect: 5-120 mmHg - this is because the ventricle needs to fall below atrial
pressure for ventricular filling to occur, 80-120mmHg is the pressure range of the
aorta
refer to pressures in my summary :)
LABS / Integrated questions 1
2020 paper
17. When comparing the type of blood and the likely pressure ranges inside the
structure:
Brachiocephalic artery = oxygenated blood= ~5-120 mmHg
Incorrect. Minimum pressure of the brachiocephalic artery would be the same as
diastolic pressure of ~80 mmHg. This is because the brachiocephalic artery is
continuous with the aorta. Blood only enters the aorta once ventricular pressure
has exceeded diastolic pressure of 80 mmHg. However, the value of 120 mmHg
maximum pressure is correct as this is the maximum pressure of blood
experienced by the aorta from the left ventricle.
Corrected statement: Brachiocephalic artery = oxygenated blood = ~80-120
mmHg.
18. Pulmonary vein = deoxygenated blood = ~5-25 mmHg
pulmonary veins drain oxygenated blood back to the left atrium from the lungs
have a pressure range of ~2-8mmHg, therefore the entire statement is
INCORRECT.
19. Pulmonary artery = oxygenated blood = ~2-8 mmHg
Incorrect: Pulmonary artery is deoxygenated with a blood pressure range of 10-27
mmHg
20. Left ventricle = oxygenated blood = ~80-120 mmHg
Incorrect: 5-120 mmHg - this is because the ventricle needs to fall below atrial
pressure for ventricular filling to occur, 80-120mmHg is the pressure range of the
aorta
refer to pressures in my summary :)
LABS / Integrated questions 1
