Arterioles offer more resistance to flow than other vessels since they

1.	Arterioles offer more resistance to flow than other vessels since they have A. Thicker muscular walls. B. Richer sympathetic innervation. C. Smaller internal diameters. D. A smaller total cross-sectional area. E. A greater pressure drop along their length.
Answer» A. False Wall thickness is not a factor determining resistance. B. False But it suggests that the resistance they offer may be varied by change in nerve activity. C. False Capillaries have even smaller internal diameters. D. False The aorta has a much smaller total cross-sectional area. E. True The pressure drop across the arteriolar bed is larger than in other beds indicating that arterioles are responsible for most of the circulation’s vascular resistance.

Arterioles offer more resistance to flow than other vessels since they have A. Thicker muscular walls. B. Richer sympathetic innervation. C. Smaller internal diameters. D. A smaller total cross-sectional area. E. A greater pressure drop along their length.

Answer»

A. False Wall thickness is not a factor determining resistance.

B. False But it suggests that the resistance they offer may be varied by change in nerve activity.

C. False Capillaries have even smaller internal diameters.

D. False The aorta has a much smaller total cross-sectional area.

E. True The pressure drop across the arteriolar bed is larger than in other beds indicating that arterioles are responsible for most of the circulation’s vascular resistance.

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Arterioles offer more resistance to flow than other vessels since they have A. Thicker muscular walls. B. Richer sympathetic innervation. C. Smaller internal diameters. D. A smaller total cross-sectional area. E. A greater pressure drop along their length.

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