According to the given statement the efferent arteriole's diameter is less than the afferent arteriole's.
As the primary location of total peripheral resistance, arterioles play a role in maintaining the mean arterial pressure and tissue perfusion. They also play a crucial part in controlling flow of blood in an organ- or tissue-specific manner by expanding or contracting the diameter.
The smallest arteries are the arterioles, which range in size from 0.3 millimeters to 10 microns (m). The largest arterioles have three tunica, whereas the tiniest arterioles, which lead to capillary beds, only have one layer of smooth muscle that are organized in a spiral around the endothelium.
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