Blood pressure in the glomerulus in very high. Hope this helps!!!!!!!!!! :D
glomerulus
The glomerulus.
High blood pressure can damage the glomerulus in the kidney by putting excessive strain on the delicate blood vessels within it. This can lead to a condition known as glomerulosclerosis, where the blood vessels become scarred and lose their ability to filter waste products effectively, resulting in impaired kidney function.
The blood in the glomerulus is under high pressure due to the unique structure of the renal artery and the afferent arterioles leading into the glomerulus, which have a relatively larger diameter than the efferent arterioles exiting it. This difference in diameter creates a pressure gradient that forces blood into the glomerular capillaries, facilitating the filtration of water and solutes into the Bowman's capsule. Additionally, the high pressure is essential for efficient filtration, allowing the kidneys to effectively remove waste products and excess substances from the blood.
The diameter of the afferent renal arteriole narrows progressively more and more into the glomerular capillaries, with the same blood flow, leading to an increase in pressure within the glomerulus. This is so that the high pressure can force solutes and water across into the Bowman's capsule for the renal tubules.
The cluster of capillaries that forms a glomerulus arises from an afferent arteriole. After passing through the glomerular capillaries, blood (minus any filtered fluid) enters an efferent arteriole whose diameter is smaller than that of the afferent vessel. This is instead of entering a venule, the usual circulatory route. The efferent arteriole resists blood flow to some extent, which backs up blood into the glomerulus, increasing pressure in the glomerular capillary.
http://en.wikipedia.org/wiki/Angiotensin
It builds up because the calibre of the efferent arteriole is less than that of the afferent arteriole. The cappilary pressure is opposed by the lower osmotic pressure or the blood and the lower filtrate hydrostatic pressure in the glomerular capsule.
The glomerulus is a cluster of capillaries that can be found in the kidney. Each cluster is next to a Bowman's capsule, which is the "filter unit" of the nephron. Blood passes from the renal artery into the glomerulus at high pressure, allowing small substances to diffuse into the nephron, via the Bowman's capsule.
afferent glomerular arteriole a branch of an interlobular artery that goes to a renal glomerulus.efferent glomerular arteriole one arising from a renal glomerulus, breaking up into capillaries to supply renal tubules.Remember because they are arterioles NOT venules they they both carry blood away from the heart.
It always has a widre lumen so that blood is forced to diffuse and filter. This puts a little more stress on the afferent arteriole and so a slight increase in the thickness of the tunica media may be noted.