Flashcards in Quantitative Renal Physiology or Evaluation of Renal Function Deck (11):

1

## What is the equation for mass flow?

### Mass Flow = Concentration x Volume Flow

2

## What are the routes of flow in the kidney?

###
Input - renal artery

Output - urine, renal vein, lymphatics

3

## What is the equation for filtration rate?

### Filtration Rate = GFR x Px

4

## What is the equation for excretion rate?

### Excretion Rate = UF x Ux

5

## What substance is used as a model to measure kidney function?

### Inulin (not produced in body, not metabolized, excreted only by kidney)

6

## What is the equation for plasma inulin concentration?

### P in = Infusion rate / Output rate

7

## What is the equation that relates GFR and inulin?

### GFR = UF x U in / P in

8

## Define clearance.

### Volume of plasma that is completely cleared of a substance by the kidneys per unit time.

9

## What is the equation for extraction ratio?

###
Ex Ratio = (Ax - Vx) / Ax

Ax = arterial [ ]

Vx = renal venous [ ]

10

## What substance do we use to calculate effective renal plasma flow and what is the equation?

###
Para aminohippurate

C pah = (UF x U pah) / P pah

11