Bowman’s capsule is the site of which process?

• A. Filtration
• B. Reabsorption
• C. Secretion
• D. Excretion

Answer: (A)

The process being tested is filtration. Bowman's capsule sits around the glomerulus in the renal corpuscle and collects the filtrate that is forced out of the blood by glomerular hydrostatic pressure. This filtrate includes water, ions, glucose, amino acids, and waste products, but large proteins and blood cells stay in the bloodstream because of the selective filtration barrier. Reabsorption and secretion happen later along the renal tubules to modify the filtrate, and excretion is the final elimination of urine from the body. So Bowman's capsule is the site where filtration occurs.