Difficulty: Medium
Average Score: 91%
Entry Exam
What force primarily drives filtration in the kidneys?
Correct answer
D
Rationale
Filtration in the kidneys is primarily driven by blood pressure. The glomerulus filters blood under pressure, allowing small molecules and fluids to pass through into the renal tubules while retaining larger molecules like proteins. Osmosis, smooth muscle contraction, and peristalsis do play roles in kidney function, but blood pressure is the main force responsible for the initial filtration process.