What % of body does water make up?
60%
Why is water important (5 points)?
- Universal solvent
- Liquid at room temp
- Can absorb and hold heat energy
- Evaporation uses heat energy
- Needed for important chem reactions
Water
polar or non polar?
Polar
What end of water is slightly positive
Hydrogen
What end if water is slightly negative
Oxygen
Does water have strong or weak hydrogen bonds?
Weak
Polar solutes are hydro______
Hydrophilic
Non-Polar solutes are hydro_______
Hydrophobic
How does water cool body temperature?
- Loses excess heat via sweat
- Sweat evaporates and cools the body
How does water heat up body temperature?
Absorbs large amounts of energy and generates heat during metabolic activities
What are the two main reactions in the body?
- Hydrolysis
- Dehydration Synthesis
Why is water being liquid at room temp a benefit? (3 points)
- Transports solutes throughout body
- Can temporarily break weak H+ bonds
- Main component in fluid filled spaces in the body ( intracellular, intercellular, organs)
Hydrolysis Def
Breaking down macros
Dehydration synthesis
Forming macros
Most important ion in the body
Hydrogen
Water breaks down into:
Hydrogen (H+) and hydroxide (OH-)
Acids _______ H+ ions
Give up
Bases _______ H+ ions
Take
pH Scale Def
Measure of concentration of the H+ in a solution
pH of Blood
7.4
What regulates pH changes?
Blood buffer system
Buffer when blood is too ACIDIC
Bicarbonate ions will TAKE H+
Buffer when blood is too BASIC
Carbonic acid gives away H+
