Describe the two stages of urine formation?

Answer 1

As Kidneys are the Purifying organs in Humans, it receieves blood from the Renal Vein and purifies the blood, the waste material in blood and water is filtered in the kidneys and that's how it produces Urine.

The process of urine production is complex. The kidneys are composed of units, Nephrons. Each kidney has about 1 million nephrons. Blood is filtered at the begginning of the nephron, and urine leaves the other end of a nephron in a collecting duct. Collecting ducts drain into Calxyes, renal pelvis, into the ureter (tube from the kidney) and finally into the bladder, where urine is stored until it is excreted, an adult male bladder can hold upto 7L of urine.

Everything in blood smaller than a protein molecule is absorded (e.g. glucose, Na+, Ca2+, other minerals and vitamins), during infection of the kidneys or severe illness protein may leak into the nephron and will be excreted into the urine as it cannot be reabsorbed into the blood.

Much of what is absorbed from the blood is returned from the nephron to the blood stream (it is reabsorbed).

The design of the nephron allows blood volume, Na+ concentration, K+ concentration, pH and other factors to be controlled.

Answer 2

1. Filteration:

When blood enters the glomerules, the high pressure forces water and dissolved blood components through the differentially permable cell membranes and into the capsule. This resultant is termed '' filteration '' .

2. Reabsorption:

Where materials are reabsorbed, eg. water, glucose and amino acids.

3. Secretion:

Adds materials to the filterate from the blood and removes unwanted materials from the body. The water and other substances not absorbed get drained into the renal pelvis (From there its now called urine). It drains into uterers and is pushed by waves of muscle contraction to urinary bladder where it's stored. The urethra carries the urine from the bladder to the exterior of the body.

hope that answers it :)

Answer 3

1. Urine forms from the filtered material that passes into the capsule.

2. the filtering process is something like cleaning your locker by throwing everything in your locker into a wastebasket, and then putting back the things that you want to keep.

Answer 4

The first stage of urine production in the kidneys it is glomerular filtration

Answer 5

during ultrafiltration even those substances which r necessary for body metabolisw also difuse out into the blood.

Answer 6

the significant of urine formation is throu gh the ureters and gets stored in a reservoir called the urinary bladder