the kidneys Flashcards
why is glucose found in the urine of someone with diabetes
A person with untreated diabetes will have a high concentration of glucose in their blood. This means that a lot of glucose will be filtered out of the blood during ultrafiltration, giving a filtrate with a high concentration of glucose. During selective reabsorption in the proximal convoluted tubule, the co-transport proteins that are responsible for reabsorbing glucose will be saturated. This means not all of the glucose from the filtrate can be reabsorbed, and some will remain in urine.
why might osmoregulation of water not prevent dehydration
-osmoregulation does not increase blood water potential , it only prevents the blood water potential from decreasing further . further intake of water is needed to prevent dehydration
what to not forget to say when answering questions about the kidney
: if applicable to question
- sodium ions also enter the descending limb aswell as water moving out
-water remains in the ascending limb due to the walls being impermeable to water
-ADH increases permeability of walls to water
what is blood pressure aboit
blood VOLUME due to water gain or loss
