Saturation of carriers is a critical rate-limiting factor in the transport of selected substances across the kidney membranes during urine formation.

Question

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Saturation of carriers refers to the phenomenon where all available carrier proteins are occupied by a particular substance, which limits the transport rate. This is a key rate-limiting factor in the kidney's ability to reabsorb certain substances from the filtrate back into the bloodstream or excrete them in the urine.

Saturation of Carriers Is a Critical Rate-Limiting Factor in the Transport