Questions: True or False and provide your rationale for your answer: The filtration process occurs across the filtration membrane which includes three layers: proximal convoluted tubules, loop of Henle, and collecting ducts.

The answer is False: The filtration process occurs across the filtration membrane which includes three layers: proximal convoluted tubules, loop of Henle, and collecting ducts.

Explanation: The filtration process in the kidneys occurs across the filtration membrane, which is part of the renal corpuscle. The renal corpuscle consists of the glomerulus and Bowman's capsule. The filtration membrane itself has three layers:

1. The fenestrated endothelium of the glomerular capillaries.
2. The basement membrane.
3. The podocytes of Bowman's capsule with their filtration slits.

The proximal convoluted tubules, loop of Henle, and collecting ducts are parts of the nephron involved in the reabsorption and secretion processes, but they are not part of the filtration membrane. Therefore, the statement is incorrect.