The wall of the left ventricle is thicker than the wall of the right ventricle because the
a. left ventricle must pump much more blood than the right ventricle so it must have stronger walls.
b. right ventricle must pump much more blood than the left ventricle so it has a larger chamber to accommodate the blood and a correspondingly thinner wall.
c. left ventricle must pump the same amount of blood into the high-resistance, high-pressure systemic system as does the right ventricle into the low-resistance, low-pressure pulmonary system.
d. right ventricle must create higher tension within its walls.
e. left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood.
C
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Resistance is a force that
A) increases blood flow. B) decreases blood flow. C) never changes in a blood vessel. D) acts with pressure to move blood along a vessel. E) is always higher than blood pressure.
Which bone would likely take the longest to heal?
A) thigh bone of an elderly individual B) finger bone of a young individual C) thigh bone of a young individual D) finger bone of an elderly individual
Which chamber generates the highest pressure during systole?
What will be an ideal response?
A patient is speaking about his risk of heart disease and his lipid levels. Which of the following shows further education is needed?
a) I need to raise my low-density lipoprotein (LDL) levels and lower my high-density lipoprotein (HDL) levels. b) Cholesterol is found in the diet and is synthesized by the liver. c) HDL is the “good” cholesterol. d) Some medications can lower your cholesterol.