Final answer:
In proteinuria, there is increased filtration of proteins due to possible damage to the glomerulus, decreased concentration as proteins are not reabsorbed in the kidney tubules, and decreased tubular absorption leading to the presence of protein in the urine.
Step-by-step explanation:
When a patient has proteinuria, it indicates that there is an abnormal presence of protein in the urine. This condition suggests that there's some kind of problem with the kidney's filtration system. In the case of proteinuria, the most likely scenario is that there is:
Considering these points, the correct answer to what is happening with filtration, concentration, and tubular absorption in a patient with proteinuria would be b) Increased filtration, decreased concentration, decreased tubular absorption.