What physical feature of large systemic arteries (resistance vessels) makes them relatively more responsive to changes in intracellular calcium concentrations?
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All blood vessels have a tunica intima. This layer is made of endothelial cells, and is an essential structural component.
Intracellular calcium is the cellular messenger
The tunica media is a muscular layer, which can be contracted and relaxed to enact changes in blood pressure.
A thick tunica media is characteristic of large systemic arteries.
A thick tunica media explains the responsiveness of large systemic arteries to changes in intracellular calcium concentrations.
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