physiology

Highest pressure in veins is in the leg

true

Severe hyperventilation (low CO2) can lead to loss of consciousness

true

Collateral flow can damage the myocardium

false

Isovolumic relaxation time (IVRT) - is the interval from aortic valve closure to mitral valve opening

true

Atrial contraction corresponds 70-80% of total ventricular filling

false

Residual volume is the volume of air remaining in the lungs after the most forceful expiration

true

Small diameter airways are the main sites of airways resistance

false

Lungs are fully emptied and filled with each breath

false

PO2 in the pulmonary vein and the left atrium is equal

false

Central chemoreceptors sense the oxygen tension of the arterial blood

false