noun
definition
One of the small branches of an artery, especially one that connects with capillaries.
Examples of arterioles in a Sentence
The delicate connectivetissue fibrillae of the inner coat of the arterioles are usually first and most affected.
No other known drug has an equally marked action in contracting the arterioles.
Drugs acting on the blood vessels, which either dilate the vessels when taken internally or applied locally, or contract the superficial arterioles.
In some cases they may connect directly to dilated arterioles.
The driving hydrostatic pressure (head of pressure) is controlled by the afferent and efferent arterioles, and provided by arterial pressure.
Radioactive microspheres are subsequently injected into a vein so they lodge within the pulmonary arterioles and a second picture is taken.
The increase in CBF will happen because of a decrease in cerebral resistance, caused by dilatation of the cerebral arterioles.
Branching of the blood vessels can be glimpsed to the lower right where two smaller arterioles join the larger vessel.
It can affect any type or size of blood vessel-large arteries and veins as well as arterioles, venules, or capillaries.
These vessels receive blood from the arterioles and deliver blood to the venules.
The arterial system is very completely developed in both Limulus and Scorpio, branching repeatedly until minute arterioles are formed, not to be distinguished from true capillaries; FIG.
The change appears to begin in the fibrils which lie between the circular muscle fibres of the middle coat of the smaller arterioles and extends both backwards and forwards along the vessels.
Physostigmine, indeed, stimulates nearly all the non-striped muscles in the body, and this action upon the muscular coats of the arteries, and especially of the arterioles, causes a great rise in blood-pressure shortly after its absorption, which is very rapid.
Not only is the respiratory centre stimulated but the cardiac centre is acted upon both directly by the drug and indirectly for a time by the enormous rise in blood pressure due to the contraction of the arterioles all over the body.
Its first action on any of the body-tissues is upon unstriped muscle, so that the first consequence of its absorption is a contraction of the arteries and arterioles.