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Encyclopedia > Arterioles

An arteriole is a blood vessel that extends and branchs out from an artery and leads to capillaries.


Arterioles have thick muscularized walls and are the primary site of vascular resistance. The mean blood pressure in the arteries supplying the body is a result of the interaction between the cardiac output (the volume of blood the heart is pumping per minute) and the vascular resistance, usually termed total peripheral resistance by physicians and researchers.


The up and down fluctuation of the arterial blood pressure is due to the pulsatile nature of the cardiac output and determined by the interaction of the stroke volume versus the volume and elasticity of the major arteries.





Cardiovascular system

Heart - Aorta - Arteries _ Arterioles _ Capillaries - Venules - Veins - Venae cavae _ Pulmonary arteries - Lungs - Pulmonary veins - Blood



  Results from FactBites:
 
Arteriole - Wikipedia, the free encyclopedia (210 words)
The mean blood pressure in the arteries supplying the body is a result of the interaction between the cardiac output (the volume of blood the heart is pumping per minute) and the vascular resistance, usually termed total peripheral resistance by physicians and researchers.
The up and down fluctuation of the arterial blood pressure is due to the pulsatile nature of the cardiac output and determined by the interaction of the stroke volume versus the volume and elasticity of the major arteries.
The muscular contraction of arterioles is targetted by drugs that lower blood pressure (antihypertensives), for example the dihydropyridines (nifedipine and nicardipine), which block the calcium conductance in the muscular layer of the arterioles, causing relaxation.
Determinants of renal microvascular response to ACh: afferent and efferent arteriolar actions of EDHF -- Wang and ... (5099 words)
ANG II-induced vasoconstriction in the afferent and efferent arteriole
the efferent arteriole (24) and that pharmacological inhibition
reversed the ANG II-induced vasoconstriction in the afferent arteriole
  More results at FactBites »

 
 

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