WorksheetsCardiovascular System Quiz
Total questions: 10
Worksheet time: 5mins
Blood flow in the capillaries is steady despite the rhythmic pumping of the heart because of the
elasticity of the large arteries
small diameter of capillaries
thin walls of the veins
venous valves
The baroreceptors in the carotid sinus and aortic arch are sensitive to
a decrease in CO2
changes in arterial pressure
a decrease in O2
all of these
The myocardium receives its blood supply directly from the
aorta
coronary arteries
coronary sinus
pulmonary arteries
Arterial blood pressure increases in response to
increasing stroke volume
increasing heart rate
atherosclerosis
rising blood volume
all of these
The structure of a capillary wall differs from that of a vein or an artery because
it has two tunics instead of three
there is less smooth muscle
it has a single tunic-only the tunica intima
none of these
Which statement does not accurately describe veins?
have less elastic tissue and smooth muscle than arteries
contain more fibrous tissue than arteries
most veins in the extremities have valves
always carry deoxygenated blood
Which of the following do not drain directly into the inferior vena cava?
inferior phrenic veins
hepatic veins
inferior mesenteric vein
renal veins
Which of the following can lead to decreased venous return of blood to the heart?
an increase in blood volume
an increase in venous pressure
damage to the venous valves
increased muscular activity
Which of the following would not result in the dilation of the terminal arterioles and upstream arterioles in systemic capillary beds?
a decrease in local tissue O2 content
an increase in local tissue CO2
a local increase in histamine
a local increase in pH
Total peripheral resistance
is inversely proportional to the length of the vascular bed
increases in anemia
decreases in polycythemia
is inversely related to the diameter of the arterioles
