Welcoming Water
List three ways we source water
Water as a liquid
Metabolic water produced during cellular processes - catabolism
List four ways to eliminate water
Urination
Evaporation at skin
Evaporation at lungs
Loss in feces
How much of our body weight (on average) is water
60%
Name something in the kidneys that can regulate hydration/dehydration
RAAS
Describe the main fluid compartments of the body and the composition of each
Describe the main fluid compartments of the body and the composition of each
How much water do we (should we) source daily
2500 mL
How much water do we eliminate every day
2500 mL
Trick question - we cannot "store" water and thats why we need to drink water daily, we are not camels
Name something in the heart/blood vessels that can detect hydration/dehydration
Baroreceptors
*note these detect pressure and decreased BP can be a result of dehydration aka Claire
How much water do we source from food
1000 mL
How much water do we eliminate via urination
1200 mL
Where is water found within the body (high level)
Intracellular and Extracellular
Name something in the brain that can detect hydration/dehydration
Simple answer: thirst receptors talking to your hypothalamus
Not so simple answer: wait for another learning issue
How much water do we source as a liquid
1200 mL
How much water do we eliminate via feces
150 mL
How much of our body water is intracellular
40%
Name something in the blood which can affect water flow
Oncotic pressure
Osmolarity
How much water do we source from metabolic processes eg catabolism
300 mL
How much water do we eliminate via evaporation at:
a. Skin
b. Lungs
750 mL
400 mL
How much of our body water is extracellular
20%
This includes interstitial fluid and plasma
There is the 60,40,20 rule for water in the body: 60% of our body weight is water, 40% of our body weight is intracellular water and 20% of our body weight is extracellular