arteriole

(redirected from Arterioles)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

arteriole

[är′tir·ē‚ōl]
(anatomy)
An artery of small diameter that terminates in capillaries.
References in periodicals archive ?
Textbooks about the brain often point to star-shaped cells called astrocytes as the middlemen that carry the message--"more blood, please"--from neurons to arterioles.
This is the effect that would be expected since minoxidil had a preferential effect on peripheral arterioles, and not renal arterioles, as evidenced by a marked decrease in total peripheral resistance but no significant changes in renal vascular resistance (4, 6, 14, 22, 28).
The subendothelial layer of the intima in arteries and arterioles contains a sheetlike layer or lamella of fenestrated elastic material called the internal elastic membrane.
As the measurements were dependent upon the number of vessels selected, Knudtson and colleagues (13) developed a revised formula based on the six largest arterioles and venules passing through the measurement zone (see Figure 2).
Since pulmonary vascular remodeling mainly occurs in distal pulmonary arterioles and manifests as smooth muscle cell hyperplasia, medial hypertrophy, and muscularization of pulmonary arterioles with microthrombosis and luminal stenosis, the PASMCs used in the current study were harvested from the distal pulmonary arterioles.
The earliest and most common abnormality found in patients with MPS is cystic lesions that correspond to enlargement of the Virchow-Robin perivascular spaces (PVS), which are pia-lined spaces that accompany penetrating arteries and arterioles into the brain parenchyma.
6) They found that both short- and long-term exposure to elevated levels of fine PM was associated with narrowing of the arterioles and widening of the venules, measured as central retinal arteriolar equivalents (CRAE) and central retinal venular equivalents (CRVE), respectively.
The authors therefore suggested that COPD may affect large and small blood vessels, and that stiffening of arteries and arterioles may be the result of systemic inflammation in COPD as well as hypoxia caused by airflow limitation.
Yet these tiny arterioles and venules deliver oxygen and nutrients to energy-hungry brain cells and carry away wastes.
The study of molecular mechanisms governing the interaction between brain arterioles, neurons and glia cells (neurovascular coupling) has been halted by the lack of appropriate techniques.
Pathologic parameters evaluated were percentage of GS, percentage of interstitial fibrosis/tubular atrophy (IF/TA) estimated to the nearest 5%, and vascular sclerosis of arteries and arterioles separately scored in a semiquantitative manner as none-to-mild, moderate, or severe.
Coronary endothelial function was tested, in epicardial arteries and arterioles, by using organ chamber techniques.