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Questions and Answers
What is the main difference between a small artery and an arteriole?
What is the main difference between a small artery and an arteriole?
- The tunica adventitia is thicker in the arteriole than in the small artery
- The internal elastic tunica intima membrane (IEM) is always present in the small artery but may or may not be present in the arteriole (correct)
- The smooth muscle cells in the tunica media are absent in the arteriole
- The endothelium in the small artery is thicker than in the arteriole
What is the tunica adventitia?
What is the tunica adventitia?
- The layer of endothelial cells in the tunica intima of a small artery or arteriole
- The smooth muscle layer in a small artery or arteriole
- The layer of connective tissue that surrounds the heart
- A thin, ill-defined sheath of connective tissue that blends with the connective tissue in which small arteries and arterioles travel (correct)
What is the difference between the endothelium in small arteries and arterioles compared to other arteries?
What is the difference between the endothelium in small arteries and arterioles compared to other arteries?
- The endothelium is absent in small arteries and arterioles
- Gap junctions may be found between endothelial cells and the smooth muscle cells of the tunica media (correct)
- The endothelium is thinner in small arteries and arterioles than in other arteries
- The endothelium is thicker in small arteries and arterioles than in other arteries
