Importance of water in living organisms
Essay plan
- Created by: fabulous unicorn
- Created on: 17-06-18 19:14
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- Importance of water in living organisms
- Osmosis
- Maintains and changes water potentials for example in the kidney nephron
- Reabsorption of tissue fluid
- Homeostasis
- Sweating decreases temperature due to high latent heat of vaporisation
- Water allows transport of hormones to increase uptake of water and ions in the kidneys
- Maintaining environments
- High specific heat capacity, so acts as a temperature buffer in environments
- Ice has a lower density than water, allowing insulation of aquatic environments
- Photo-synthesis
- Needed for photolysis to replace electrons for transport chain
- Provides a medium (stroma) in which the light-independent reaction occurs
- Transparent so allows light to penetrate into palisade cells
- Solvent
- Dissolves many monomers and inorganic ions
- Allows transport
- Transport
- Needed for blood and tissue fluid
- Cohesion-tension in the xylem due to hydrogen bonding
- Gas exchange
- Counter-current flow mechanism allows fish to live in water
- Allows water potential difference in insects so more air is forced in due to lactate production
- Alveoli moist, and blood contains water to transport oxygen and CO2
- Low viscosity
- Allows fish to swim in aquatic environments
- Easier for animals to move in and drink
- Less friction so increased rate of transport
- Osmosis
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