Question

how does filtration occur during the formation of urine?
a. nephron tubes filter waste products and transfer them into the collecting tubules.
b. pressure causes water and dissolved substances to filter through capillary walls of the glomerulus.
c. gravity forces large particles to filter through capillary walls of the glomerulus.
d. bowmans capsules collect dissolved substances and transfer them to the peritubular capillaries.

Explanation:

Filtration in the kidney occurs when blood pressure forces water and dissolved substances through the capillary walls of the glomerulus into Bowman's capsule. Nephron tubules are involved in re - absorption and secretion, not the initial filtration step. Gravity is not the main force in glomerular filtration. Bowman's capsules collect the filtrate, not transfer substances to peritubular capillaries during filtration.

Answer:

B. Pressure causes water and dissolved substances to filter through capillary walls of the glomerulus.