Water Flashcards
1
Q
Example of water as transport medium
A
- minerals in lakes and seas
- removal of metabolic waste eg urea and ammonia in urine
- blood and lymph transport
2
Q
Transportation stream
A
- moves up xylem due to continuous column
- cohesion between water molecules
- adhesion with xylem walls
3
Q
Supporting role; examples
A
- good medium for support as cohesive forces disallow compression
- amniotic fluid for foetuses
4
Q
Transparency
A
- allows light to pass through; vital for photosynthesis in aquatic plants
5
Q
Lubricant properties and examples
A
- cohesive and adhesive; making it viscous
- synovial fluid in joints
- pleural fluid ; lungs and thoracic cage during breathing
- mucus; easy passage of faeces, lubricates vagina and penis during sex
6
Q
Thermoregulation
A
- high heat capacity means organisms are thermostat or and less prone to heat damage
- cooling of organisms due to high latent heat of vaporisation; releases energy eg sweating
7
Q
Solvent properties
A
- polarity; solvent for other polar molecules
8
Q
High heat capacity
A
- heat (joules) requires to raise 1 kg of water by 1 degrees
- very high
9
Q
High latent heat of vaporisation
A
- high energy needed to vaporise water
- hydrogen bonds continuous attract to other water molecules
- high boiling point
10
Q
- density and freezing properties
A
- when cools as molecules slow down and form max hydrogen bonds
- expands when it freezes, less dense than liquid water; ice floats
11
Q
Metabolic functions
A
- reagent in photosynthesis
- hydrolysed macromolecules in digestions
- medium for biochemical reactions to take place
