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What structural features of capillaries allow the exchange of
materials between blood and body cells?
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- Which layer of the blood vessel reduces resistance due to its smooth surface? A )Adventitia B) Tunica intimaDo capillaries exchange substances between the blood and the interstitial fluid in the same way throughout the body? Why?When it comes to arteries and veins, do veins have? a) a tunica media that is missing in arteries b) thicker walls than arteries c) more smooth muscles than arteries d) valves, this is lacking in arteries
- Which of the following statements about blood vessels is TRUE? A) Venules have large lumens, thin walls, & are high pressure vessels B) Arterioles have small lumens, thick walls, & are low pressure vessels C) True capillaries possess pre-capillary sphincters and are surrounded by smooth muscle cells D) Both A & B E) None of the aboveWhich of the following statements concerning capillaries is TRUE? A) Capillaries are composed of a single layer of endothelial cells surrounded by a basement membrane B) Thoroughfare channels drain directly into venules C) Metarterioles branch directly off arterioles D) Both A & B All of the aboveWhen looking at anatomical and physiological features of different types of blood vessels what are the similarities and differences?
- The two-way exchange of substances between blood and body cells occurs only through (a) arterioles. (b) capillaries. (c) venules. (d) a, b, and c are correct.Local control of blood flow through a tissue a) maintains a blood flow independent of changes in blood pressure b) is controlled via a relaxation or contraction of precapillary sphincters c) is controlled by changes in oxygen levels in the tissue d) is controlled by changes in carbon dioxide levels in the tissueWhat is the difference between pulmonary and systemic vessels?
- In the blood vessels, what relationship is formed between pressure, resistance, and flow?what are two types of circulation of blood present in our body?At which level of the blood vessels system is where blood pressure regulation occurs? a) Capillaries b) Aterioles c) large arteries d) large veins e) conduct arteries