1a. Which of the following are stages of the cardiac
cycle? Select all that apply.
a. As blood flows into the arteries, the pressure in the
ventricles drops, and the aortic and pulmonary valves
close
b. The ventricles start to contract and rising pressure
shuts the atrioventricular valves and opens the aortic and
pulmonary valves.
c. An atrial contraction squeezes more blood into the
relaxed ventricles.
d. As relaxed atria fill, fluid pressure opens the
atrioventricular valves, and blood flows into the relaxed
ventricles.
1b. Which of the following components of blood is filled
with hemoglobin and transports oxygen?
a. Plasma
b. Red blood cell
c. White blood cell
d. Platelet
1c. During capillary exchange, which of the following
occurs only at the arterial end of a capillary?
a. CO2
b. diffuses and other wastes are transported into the
plasma.
c. High blood pressure forces protein-free plasma out
between cells of the capillary wall.
d. Water enters blood by osmosis.
e. O2
f. diffuses and nutrients are transported out of blood
into interstitial fluid.