Renin
The kidneys filter urea, excess water and some mineral salts from the blood. This solution of unwanted products is referred to as urine.
Blood pressure promotes filtration of blood in the kidneys by, generally, being greater in pressure than blood colloid osmotic pressure and glomerular capsule pressure which produces a net filtration pressure of about 10 mm Hg. Net filtration pressure forces a large volume of fluid into the capsular space. When blood pressure increase or decreases slightly, changes in the diameters of the afferent and efferent arterioles can actually keep net filtration pressure steady to maintain normal glomerular filtration. Constriction of the afferent arteriole decreases blood flow into the glomerulus, which decreases net filtration pressure. Constriction of the efferent arteriole slows outflow of blood and increases net filtration pressure.
I'm not sure about "adolesterone".If you are asking about 'aldosterone' well, that is a hormone which is secreted by the adrenal cortex in the adrenal gland.Aldosterone helps the body reabsorb soduim and water, and secrete potassium into the kidneys. This causes higher blood pressure, by increasing blood volume.
Renal means related to kidneys. Kidneys are very sensitive to hypotension. That is to low blood pressure. Kidneys have to wash out the waste products of protein metabolism. They are very much toxic to the brain. Your kidneys are very small in size, but still get very heavy blood supply. Kidneys filter out about 180 litres of fluid per day. That is the need of the hour. In case of hypotension, this function will be adversely affected. So kidneys secrete the hormone to maintain the blood pressure.
The kidney filters waste products out of the blood, ultimately forming urine.
What occurs as blood moves away from the heart? pulse decreases blood pressure increases pulse increases blood pressure decreases
The pressure decreases as it moves away from the heart.
I can tell you that high blood pressure, if it is not brought under control, can cause the kidneys to fail completely.
Filtrate volume decreases when systemic blood pressure decreases.
They help regulate blood pressure (I think)
They help regulate blood pressure (I think)
The juxtaglomerular cells located in the walls of the afferent arteriole secrete renin when they sense a drop in blood pressure. Renin is released into the bloodstream in response to decreased blood flow to the kidneys, ultimately leading to the activation of the renin-angiotensin-aldosterone system to help regulate blood pressure and fluid balance.