19. The Blood Vessels

The baroreceptors in the carotid sinus and aortic arch are sensitive to

a. a decrease in CO₂

b. changes in arterial pressure

c. a decrease in O₂

d. all of these

Hannah, a newborn baby, needs surgery because she was born with an aorta that arises from the right ventricle and a pulmonary trunk that issues from the left ventricle, a condition called transposition of the great vessels. What are the physiological consequences of this defect?

Trace one drop of blood from the time it enters the right atrium of the heart until it enters the left atrium. What is this circuit called?

More than one choice may apply.

A stroke that occludes a posterior cerebral artery will most likely affect

a. Hearing

b. Vision

c. Smell

d. Higher thought processes