Q: Which of the following substances cannot pass through the semipermeable walls of the glomerulus?  

Answer: D

The glomerulus is a network of capillaries surrounded by Bowman's capsule in the kidney. It serves as a filtration system for blood to form urine. The walls of the glomerulus are semipermeable, meaning they only allow certain substances to pass through, while preventing others from passing through. Substances such as globin, albumin, and blood cells cannot pass through the walls of the glomerulus due to their large size. Thus, option D) is the correct answer as it correctly identifies that all of the substances listed cannot pass through the semipermeable walls of the glomerulus.

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