40. Circulatory System

Which chamber(s) of a human heart receive(s) and pump(s) oxygenated blood?

Heart valves function to __________.

What is the physiological cause of a heart attack?

Blood leaves the inferior vena cava and flows directly into the __________.

Blood pressure is highest in _________ , and blood moves most slowly in _________ . a. veins; capillaries b. arteries; capillaries c. veins; arteries d. arteries; veins

When the doctor listened to Janet's heart, he heard 'lub-hiss, lub-hiss' instead of the normal 'lub-dup' sounds. The hiss is most likely due to _________ . (Explain your answer.) a. a defective atrioventricular (AV) valve b. a damaged pacemaker (SA node) c. a defective semilunar valve d. high blood pressure

Paul's blood pressure is 150/90. The 150 indicates _________ , and the 90 indicates _________ . a. pressure in the left ventricle; pressure in the right ventricle b. pressure during ventricular contraction; pressure during heart relaxation c. systemic circuit pressure; pulmonary circuit pressure d. pressure in the arteries; pressure in the veins