Which of the following characterizes glomerular filtrate the fluid that passes from the blood in the glomerulus into the tubule of the nephron?

Answer 1

It is blood plasma that lacks most proteins.

First, bear in mind that the process that occurs here is ultrafiltration. It is a non-selective process, and molecules smaller than a predetermined size passes through a membrane.

Increase in concentration of waste products will occur only starting at the tubules near the Loop of Henle, where selective reabsorption occurs. It is only here and at the collecting duct that water starts to be reabsorped back into the bloodstream, increasing the concentration of the waste products.