Vascular Function MCQs
A. Arterial wall thickness gradually diminishes
B. Ratio of wall thickness to lumen diameter increases
C. Both of the above are True
D. Both of the above are False
ANSWER – C
Both of the above are True
Arterial wall thickness gradually diminishes as the vessels become smaller, but the ratio of wall thickness to lumen diameter increases
A. Capillaries
B. Venules
C. Arterioles
D. Capacitance vessels
ANSWER – C
Arterioles
Arterioles are the principal points of physiologic resistance to blood flow.
Resistance vessels include small arteries, arterioles, and precapillary sphincters.
Capacitance vessels include small and large veins.
Capacitance vessels have great capacity to distend. For a similar rise in pressure, capacitance vessels may accommodate 20 times more blood than resistance vessels.
A. Capillaries
B. Pulmonary vessels
C. Arterioles
D. Veins
ANSWER – D
Veins
Capacitance vessels include small and large veins.
Veins are known as capacitance vessels because they are capable of storing a significantly larger volume of blood than arteries due to their large lumen and high compliance.
Capacitance vessels have great capacity to distend. For a similar rise in pressure, capacitance vessels may accommodate 20 times more blood than resistance vessels.
A. Capillaries
B. Precapillary sphincters
C. Arterioles
D. Small arteries
ANSWER – A
Capillaries
Resistance arteries are usually small arteries or arterioles and include precapillary sphincters.
A. Capillaries
B. Postcapillaries
C. Arterioles
D. Aorta
ANSWER – D
aorta
Buffer vessels – aorta, middle-sized arteries
A. Capillaries
B. Postcapillaries
C. Arterioles
D. Aorta
ANSWER – A
Capillaries
Metabolic vessels – Capillaries
A. Buffer vessels
B. Resistance vessels
C. Metabolic vessels
D. Aorta
ANSWER – B
Resistance vessels
Resistance arteries are the target of a disease in case of stenosis or arteriosclerosis.
In-Shorts
Physiological point of view – blood vessels can be divided in several categories
Buffer vessels – aorta, middle-sized arteries
Resistance vessels – arterioles, pre- and postcapillaries.
Metabolic vessels – capillaries
Capacitance vessels – veins
The resistance vessels include small arteries, arterioles, and precapillary sphincters.
Human arteries or arterioles that are around 0.2 mm or smaller contribute to creation of the blood flow resistance and are called resistance arteries.
