10 Questions
What is the main function of the precapillary sphincter?
To control the flow of blood into capillaries
Which type of vein has the same layers as arteries but are less distinct?
All types of veins
What is the primary function of venules?
To aid in fluid exchange and leukocyte migration
What is the main component of the tunica media in small and medium-sized veins?
Circular smooth muscle
What is the purpose of pericytes in venules?
To provide structural support to the vasculature
Which of the following is a characteristic of small veins?
Thin intima with a poorly developed media
What is the main function of endothelial cells in venules?
To aid in fluid exchange and leukocyte migration
What is the primary difference between small and medium-sized veins?
The number of layers of smooth muscle in the tunica media
Which of the following is a characteristic of medium-sized veins?
Presence of longitudinal collagen and elastic fibres
What is the primary function of arteriovenous anastomoses?
To bypass capillaries and provide direct routes between arteries and veins
This quiz covers the structure and classification of capillaries, including continuous, fenestrated, and sinusoidal capillaries, and their components such as endothelium, smooth muscle, and pericytes.
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