Concept:Vitamins appear in the glomerular filtrate because they are small enough to pass through the filtration membrane.
Explanation:Blood enters the glomerulus under high pressure.
This pressure causes ultrafiltration across the capillary wall.
The filtration membrane permits small molecules to enter the Bowman’s capsule.
Vitamins, like glucose and amino acids, have low molecular weight.
Therefore, they are small enough to be filtered easily from the blood.
Large proteins and blood cells cannot pass through because of their bigger size.
Answer:C. they have low molecular weight