Question

What is the ratio of the concentrated filtrate to that of the initial filtrate?

Answer 1

Filtrate of blood:

1. The kidney plays an inevitable role in the filtration of blood and the formation of urine.
2. The urine is a product that is formed at the end of three steps namely: ultrafiltration or glomerular filtration, selective reabsorption, and tubular secretion.

Ratio:

1. The initial filtrate, also known as the glomerular filtrate is the filtrate obtained after the ultrafiltration.
2. The glomerular filtrate produced by the kidneys is 180 L per day.
3. The concentrated filtrate is the urine that is formed after the final step, which is tubular secretion.
4. The urine excreted by a person is about 1 - 1.8 L per day.
5. Hence, the ratio is that the initial filtrate is nearly 99 times the concentrated filtrate.

The ratio of the concentrated filtrate to that of the initial filtrate is 1:99.