Water Flashcards
(31 cards)
Fish are what percent water?
70%
Jellyfish are what percent water?
95%
Birds are what percent water?
60%
Iguanas are what percent water?
72%
Dogs are what percent water?
71%
Humans and newborns are what percent water?
90%
What are the functions of water?
Body metabolism and temperature control
What are the roles of thermoregulation?
- Evaporative cooling
- Blood flow regulation
- Internal fluid balance
What are properties of thermoregulation?
- High specific heat capacity
- High heat of vaporization
How is water used in metabolism?
As a solvent, cellular functions, enzyme activity, pH regulation, and chemical reactions
How much metabolic water is in protein?
0.4g of water per gram of protein
How much metabolic water is in carbohydrates?
0.6 grams of water per gram of carbohydrate
How much metabolic water is in fat?
1 gram of water per gram of fat
Water accounts for what percent of your daily need?
5-10%
Besides metabolic water, what are some other sources of water?
Drinking and free water
How does the body lose water?
Urine, feces, lungs, skin, milk (85-87%)
What are some physiological ways water is regulated in the body?
Thirst, hormonal (ADH), kidney function, osmoregulation
What are some environmental ways water can be regulated?
Temperature, humidity, quality, availability, feed DM
What are some ways quality affects how water is regulated?
Odor and taste, chemical properties (dissolved solids, pH), toxic compounds, presence of excess minerals, presence of microorganisms, salinity, sulfates, and nitrates
What is the TDS acceptable limit?
0.25%
<1000 mg/L is best
>10,000 mg/L is worst
What is the max amount of sulfates that is safe in drinking water?
500-1,000 ppm
Why is a high amount of sulfate in drinking water dangerous?
It degrades thiamine, toxicity leads to diarrhea and polioencephalomalacia (stargazing)
What is Cyanobacteria?
Gram negative blue-green bacteria that produces large amounts of nitrates in the water
What is the max amount of nitrates that is safe to drink in water?
Less than 100ppm