water output Flashcards
1
Q
How is water lost?
A
lost in urine, faeces, sweat
Evaporation from skin
from lungs during breathing
2
Q
How much water is lost in urine ?
A
60%
3
Q
What does water loss depend on?
A
temperature, relative humidity, and physical exercise
4
Q
What is the main control over water output?
A
urine production
5
Q
The distal convoluted tubules (DCTs) and collecting ducts (CDs) of the nephrons regulate
A
water output
6
Q
What happens to the permeability of the DCTs and CDs under influence of antidiuretic hormone?
A
Increases- which increase tubular reabsorption of water
7
Q
What does an increase in of the DCTs and CDs cause?
A
reduction in the amount of water lost in the urine
8
Q
What happens when drinking water?
A
the ADH mechanism is inhibited, and more water is excreted in the urine
