What is the afferent arteriole?
The afferent arteriole is an arteriole that feeds blood into the glomerulus. The afferent arterioles modulate their vascular resistance in response to changes in intraluminal pressure or composition of tubular fluid at the macula densa. In this manner, they control the glomerular filtration.
What is afferent arteriolar resistance?
Constriction of the afferent arterioles has two effects: it increases the vascular resistance which reduces renal blood flow (RBF), and it decreases the pressure downstream from the constriction, which reduces the GFR.
What gives rise to afferent arteriole?
The Renal Arteries Arise from the Abdominal Aorta At the junction of the cortex and medulla, the interlobar arteries bend over to form incomplete arches. These radial arteries give rise to short lateral branches called afferent arterioles that supply blood to the glomeruli.
What is a arteriole?
An artery carries blood away from the heart, and distribute throughout the body by its succeeding smaller branches. Eventually, the smallest branch of the artery is called arterioles, which further divide into tiny vessels to form the capillary bed.
What is afferent information?
Afferent neurons communicate information from the stimulus to the brain/spinal cord. Efferent neurons communicate information from the brain/spinal cord to the appropriate portion of the body.
What is the main difference between afferent and efferent arterioles?
The main difference between afferent and efferent arterioles is that afferent arterioles carry blood to the glomerulus whereas efferent arterioles take the blood away from the glomerulus. An afferent arteriole is a branch of the renal vein, which carries blood containing nitrogenous wastes.
Is afferent Arteriole part of nephron?
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 later diverge into the capillaries of the glomerulus.
What are Interlobar vessels?
Many arteries, called interlobular arteries, branch off from the arcuate arteries and radiate out through the cortex to end in networks of capillaries in the region just inside the capsule. En route they give off short branches called the afferent arterioles, which carry blood to the glomeruli where…
What carries blood to the afferent Arteriole?
The afferent arterioles branch from the renal artery, which supplies blood to the kidneys. The afferent arterioles later diverge into the capillaries of the glomerulus….
| Afferent arterioles | |
|---|---|
| Supplies | glomerular capillaries |
| Identifiers | |
| Latin | arteriola glomerularis afferens |
| TA98 | A08.1.03.005 |
What is the difference between an afferent and efferent arteriole?
An afferent arteriole is a branch of the renal vein, which carries blood containing nitrogenous wastes. An efferent arteriole is a branch of the renal artery, which carries filtered blood back to the circulation.
How is renin secreted from the afferent arterioles?
Cells in the afferent arterioles (juxtaglomerular cells) are the site of synthesis, storage, and release of the proteolytic enzyme renin. Three factors are important in stimulating renin secretion: 1. Perfusion pressure. When perfusion pressure to the kidneys is reduced, renin secretion by the afferent arteriole is stimulated.
What is the function of afferent arterioles in the kidney?
Distribution of bloodvessels in cortex of kidney. 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.
What is the net result of efferent arteriolar constriction?
The net result of efferent arteriolar constriction is an increased filtration fraction. The GFR most likely decreases because the RBF decreases, but the decrease in the GFR will not be proportionate because of the increase in glomerular capillary pressure.