Glucose Absorption In Kidney
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BIOLOGY QUESTION!? Involves active transport and diffusion?
Here’s the question: In the production of urine, glucose is initially lost from the blood but is then reabsorbed back into the body by cells in the kidneys. Explain why it is important that this absorption occurs by active transport rather than diffusion?
I thought maybe because glucose provides energy, and active transport requires energy (ATP)? But then again i’m really stuck on what Kidneys have to do with it :/
Any help appreciated! thank you.
It’s actually quite simple, if it happens by diffusion then eventually it would reach an equilibrium of glucose entering and leaving the urine with no concentration gradient so there would be some left in it. However if it is by active transport then it is actively pumped out so all glucose can be removed. Also if glucose were present in the urine than it would reduce the water potential so more water would be lost as it will move into the urine by osmosis.
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