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BIO 220 Topic 3 Graded Quiz Latest
BIO 220 Topic 3 Graded Quiz Latest
When blood pressure is greater than the blood colloid osmotic pressure, there is
a. a net movement of fluid into the capillary.
b. a net movement of fluid out of the capillary.
c. less lymph formed.
d. a decrease in the volume of the interstitial fluid.
e. a decreased likelihood of edema.
a. serve as valves in veins.
b. are found in the tunica media.
c. carry blood under high pressure.
d. control the blood flow into capillary beds.
e. are voluntary structures.
The structure of a capillary wall differs from that of a vein or artery because
a. the capillary wall has only two tunics.
b. capillaries have more smooth muscle.
c. capillary walls have only endothelium and a basement membrane.
d. capillaries can constrict or dilate.
e. capillaries are impermeable to all substances.
Baron von Quacko, famous tag-team wrestler, has a famous “sleeper hold” that he uses on his
opponents. Using only a single digit on each hand, he presses on his opponent’s neck until his opponent
passes out. What are the structures on which he is pressing and what is the effect?
a. subclavian arteries; blood flow to brain is stopped
b. carotid chemoreceptors; blood pressure increases
c. baroreceptors in carotid sinus; peripheral vasodilation and decreased heart rate
d. vertebral arteries; blood flow to brain is increased
e. jugular vein; blood flow back to heart is decreased
Which of the following hormones does NOT influence blood pressure?
c. atrial natriuretic hormone
e. growth hormone
Which of the following arteries is not part of the cerebral arterial circle (circle of Willis)?
b. posterior cerebellar artery
c. posterior communicating artery
d. anterior cerebral artery
e. internal carotid artery
Which of the following is LESS likely to result in edema?
a. increase in capillary permeability
b. reduced plasma colloid osmotic pressure
c. blockage of veins
d. increased mean arterial pressure
e. loss of protein molecules in urine through the kidneys
In the aorta,
a. the blood pressure and blood velocity are both high.
b. the velocity of blood flow is high, but blood pressure is low.
c. the resistance to blood flow is high, but velocity of blood flow is low.
d. the resistance to blood flow and the blood pressure are both low.
e. velocity is diminished because the total cross-sectional area is small.
In the pulmonary circulation, the _____ carry blood to the lungs.
a. carotid sinuses
b. pulmonary arteries
c. coronary arteries
The figure illustrates the capillary network. What does “C” represent?
a. precapillary sphincter
c. thoroughfare channel
d. arterial capillaries
e. venous capillaries
Which coat of an artery contains endothelium?
a. tunica intima
b. tunica media
c. tunica adventitia
d. tunica elastica
e. tunica intermedia
Which of the following enhances the exchange between capillary walls and the interstitial spaces?
a. the thinness of the capillary wall
b. minimal branching in the capillary bed
c. increased blood velocity through the capillaries
d. the high pressure in the interstitial spaces
e. the stratification of the capillary wall
a. the aorta
b. the veins
e. the arteries
What creates the pulse?
a. the diastole of the ventricles
b. ejection of blood from the left ventricle into the aorta
c. the compliance of the arteries
d. constriction of the arterioles
Which of the following statements about laminar blood flow is true?
a. The innermost layer of blood moves at the lowest velocity.
b. Laminar blood flow occurs when blood flows past an area of constriction.
c. The outermost layer of blood experiences the greatest resistance to flow.
d. In laminar blood flow, the rapid rate of blood flow exceeds critical velocity.
e. It makes lots of different noises.
The diagram illustrates a part of a capillary. What does “B” represent?
a. basement membrane
c. capillary endothelial cell
e. precapillary cell
Which of the following thoracic organs is supplied by a parietal branch of the thoracic aorta?
a. the heart
b. the lungs
c. the esophagus
d. the intercostal muscles
e. the thymus gland
On this diagram label pulse point “A”.
a. femoral artery
b. radial artery
c. common carotid artery
d. popliteal artery
e. brachial artery
Hormones from the adrenal medulla
a. are released in response to parasympathetic stimulation.
b. cause vasodilation in blood vessels of the skin.
c. decrease the heart rate.
d. cause an increase in stroke volume.
e. are released in response to vagal stimulation.
A direct connection between an arteriole and a venule without an intervening capillary bed is a(an)
a. venous sinus.
b. arteriovenous anastomosis.
d. arterial capillary.