the urinary bladder.
Water
In fact, the kidney dose not receives the urine but it produces the urine by receiving the filtrate from the blood vessels . and the first part wich receives the filtrate is the " glomerus"
The glomerulus filtrate is located within the Bowman's capsule, which is the initial part of the kidney tubule where the glomerular filtrate is collected before being processed further in the renal tubules.
The Glomerular Filtration Rate
Conditions which allow the red blood cells and protein to enter the filtrate are renal infections, kidney infections, diabetes, hypothyroidism, jaundice, and Glomerulonephritis. The reasons of red blood cells entering the filtrate can be various and dangerous.
Secretion of substances into the filtrate occurs primarily in the distal convoluted tubule and the collecting duct in the nephron of the kidney. This process helps in regulating the composition of the urine by removing additional substances from the blood and adding them to the filtrate for excretion.
The macula densa cells located in the distal convoluted tubule of the kidney are chemoreceptors that respond to changes in solute content of the filtrate. These cells are sensitive to the concentration of sodium and chloride ions in the filtrate, signaling the juxtaglomerular cells to regulate blood pressure and filtration rate accordingly.
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increases Ca++ (but not phosphate) reabsorption from the glomerular filtrate of kidney nephrons
Proximal convoluted tubule
The filtrate in the loop of nephron is primarily composed of water, electrolytes (such as sodium, potassium, and chloride), and waste products (such as urea and creatinine) filtered from the blood by the glomerulus in the kidney.
Perhaps, you wanted to know about 'glomerular filtrate'. Glomerulus is a microscopic structure in the kidney, consisting of capillary networks. It is here where the actual filtration takes place. If you wring a wet towel, you can see how water is squeezed out. Likewise, in the glomerulus, high water (hydrostatic) pressure leads to filtration, and the filtrate is called glomerular filtrate.