Afferent Arteriole
Afferent Arteriole - Related Videos
09:49
Isolation and Cannulation of Cerebral Parenchymal Arterioles
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Cited by 28 •
2016
This manuscript describes a simple and reproducible protocol for isolation of intracerebral arterioles (a group of blood vessels encompassing parenchymal arterioles, penetrating arterioles and pre-capillary arterioles) from mice, to be used in pressure myography, immunofluorescence, biochemistry, and molecular studies.
03:41
Preparing Cerebral Endothelial Tubes from Mouse Parenchymal Arterioles
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2025
This video demonstrates a method for isolating the endothelial tubes from mouse cerebral parenchyma. Through a combination of enzymatic digestion and mechanical dissociation, the process yields an intact tube with endothelial cells.
07:35
Preparation Steps for Measurement of Reactivity in Mouse Retinal Arterioles Ex Vivo
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Cited by 12 •
2018
Many vision-threatening ocular diseases are associated with dysfunctional retinal microvessels. Therefore, the measurement of retinal arteriole responses is important to investigate the underlying pathophysiological mechanisms. This article describes a detailed protocol for mouse retinal arteriole isolation and preparation to assess the effects of vasoactive substances on vascular diameter.
08:19
In Vitro Characterization of the Electrophysiological Properties of Colonic Afferent Fibers in Rats
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2017
Abnormal sensory function underlies visceral pain and other symptoms of functional and inflammatory bowel diseases. A protocol for the electrophysiological recording of the colonic afferent nerves in an ex vivo rat colorectum preparation is presented here.
01:16
Arteries and Arterioles
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2024
Arteries, the vasculature responsible for transporting blood from the heart, possess robust walls capable of enduring the elevated pressures exerted by the heartbeat. Arteries near the heart are especially thick-walled and enriched with elastic fibers across their three tunics, classifying them as elastic or conducting arteries. These arteries, usually with a diameter exceeding 10 mm, are characterized by their ability to dilate in response to the blood pumped from the heart's ventricles and...
FAQs
Afferent arterioles adjust their smooth-muscle tone when blood pressure changes. Constriction narrows the vessel, reducing blood delivery to the glomerulus and lowering glomerular pressure and filtration. Dilation has the opposite effect, increasing renal blood flow and supporting filtration. This diameter control links local vascular responses to the kidney’s ability to regulate filtration under changing pressure conditions.
The balance determines how much pressure reaches the glomerulus, where filtration begins. Excessive constriction can reduce glomerular pressure and filtration, while dilation can increase both blood flow and filtration support. Because this response influences kidney function and systemic fluid balance, afferent arteriole tone provides an important connection between vascular regulation and the composition of body fluids.
When renal perfusion decreases, specialized juxtaglomerular cells can release renin. This response adds a signaling function to the afferent arteriole region, allowing reduced blood delivery to influence blood pressure control. Studying this relationship helps explain how local changes in renal circulation can contribute to broader regulation of systemic fluid balance and cardiovascular physiology.
Researchers can examine how changes in blood pressure or local signals alter vessel diameter, glomerular pressure, filtration, and renin release. Comparing constricted and dilated states reveals how renal blood delivery affects filtration. These observations provide a framework for connecting vascular behavior with measurable aspects of kidney function rather than considering filtration as an isolated process.
Medications or vascular disease may alter the signals and pressure conditions that control afferent arteriole diameter. The resulting constriction or dilation can change renal blood flow, glomerular pressure, and filtration. Studying these effects helps clarify how an intervention or vascular abnormality may influence kidney physiology, blood pressure control, and systemic fluid balance.
Afferent arteriole physiology demonstrates how a small blood vessel can coordinate local regulation with whole-body homeostasis. Its smooth muscle responds to pressure and local signals, while nearby juxtaglomerular cells can influence renin release when perfusion falls. Together, these functions connect vascular tone, glomerular filtration, blood pressure regulation, and systemic fluid balance in one biological system.