Blood and the Cardiovascular System Exam t/f
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Vasodilation increases the diameter of blood vessels.
True
When the ventricles contract, the semilunar valves are open.
True
The normal pH of blood is 6.35 and 6.45.
False
White blood cells engulf and digest bacteria in the process called pinocytosis.
False
Deoxygenated blood first enters the heart at the left atrium.
False
A hematocrit is the proportion of the total blood volume that is composed of red blood cells.
True
Eosinophils destroy parasitic worms.
True
In a blood sample, red blood cells are more abundant than white blood cells.
True
In diapedesis, white blood cells slip through spaces in the capillary walls.
True
