The annual percentage rate is the total yearly cost of a mortgage and is expressed as a percentage of the loan amount. The APR takes into consideration the total costs of home ownership when obtaining a mortgage. The total costs include certain fees such as interest, lender charges, mortgage insurance and points.
An arteriole /ÉrËtÉªÉri.oÊl/ is a small diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries.Arterioles have muscular walls (usually only one to two layers of smooth muscle) and are the primary site of vascular resistance.The greatest change in blood pressure and velocity of blood flow occurs at the transition of arterioles to capillaries.rain arterioles are particularly sensitive to pH with reduced pH promoting vasodilation. A number of hormones influence arteriole tone such as angiotensin II (vasoconstrictive), endothelin (vasoconstrictive), bradykinin (vasodilation), atrial natruretic peptide (vasodilation), and prostacyclin (vasodilation).
Afferent arterioles. The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems. They play an important role in the regulation of blood pressure as a part of the tubuloglomerular feedback mechanism. The afferent arterioles branch from the renal artery, which supplies blood to the kidneys.