Cardiac Output & Its Regulation — Topic Test
10 questions · exam mode (answers revealed at the end). 18 min suggested.
A 6-month-old infant is investigated for failure to thrive. Studies show that a fraction of cardiac output bypasses ventilated alveoli. Which of the following best represents the normal physiological right-to-left shunt in a healthy adult contributing to the alveolar-arterial oxygen difference?
AAbout 25 percent of cardiac output via the foramen ovale
BZero percent, as no anatomical shunt exists normally
CAbout 2 percent of cardiac output via bronchial and Thebesian veins
DAbout 50 percent of cardiac output via the ductus arteriosus