40. Circulatory System

Blood pressure is highest in _________ , and blood moves most slowly in _________ .

a. Veins; capillaries

b. Arteries; capillaries

c. Veins; arteries

d. Arteries; veins

Pulse is a direct measure of

a. Blood pressure.

b. Stroke volume.

c. Cardiac output.

d. Heart rate.

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