Single Nephron and TF/P Ratio - Bishop's Notes

Question 1

[TF/P]x = 1.0 means…

Answer 1

• X is filtered, but no reabsorption takes place

- X is filtered and reabsorbed, but water reabsorption is proportional, resulting in no change in concentration ratio

Question 2

[TF/P]x

Answer 2

X is reabsorbed more than water

Question 3

[TF/P]x > 1.0 means…

Answer 3

• X has been reabsorbed, but less than water

- X has been secreted into the tubular fluid

Question 4

The fraction of filtered water reabsorbed equals…

Answer 4

= 1 - 1/[TF/P]inulin

Question 5

[TF/P]inulin can be used to calculate the __________

Answer 5

rate of water reabsorption

Question 6

The double ratio [TF/P]x / [TF/P]inulin tells us what?

Answer 6

The fraction of filtered load of X that remains at any point along the nephron.

Question 7

For example, a [TF/P]Na / [TF/P]inulin = 0.3 means…

Answer 7

30% of Na in filtered load remain in tubular fluid.

70% has been reabsorbed.