Biology: Exchange Of Materials
- Created by: Dan
- Created on: 21-03-13 21:48
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- Exchange Of Materials
- Active Transport
- Cells use Active Transport to absorb substances
- Requires Energy
- The Sports Drinks Dilemma
- When we exercise we sweat
- Ions & Water are lost in Sweat
- Sports drinks contain Sugars and Ions that we loose in sweat helping us hydrate in more ways than 1
- Exchange in the gut
- Food we eat is digested in the gut into small soluble molecules
- In the intestine these solutes are absorbed into the blood
- Food we eat is digested in the gut into small soluble molecules
- Exchange in Plants
- Stomata
- Stomata are tiny holes in the leaves
- Gases diffuse in & out of leaves through Stomata
- Stomata are controlled by Guard cells that open and close
- Plants lose water vapour through Stomata
- Efficiency
- Leaves flat and very thin
- Gases don't need to diffuse very far
- Internal Air spaces
- Gases don't need to diffuse very far
- Leaves flat and very thin
- Stomata
- Active Transport
- Osmosis
- Osmosis Is movement of Water
- Exchange Of Materials
- Active Transport
- Cells use Active Transport to absorb substances
- Requires Energy
- The Sports Drinks Dilemma
- When we exercise we sweat
- Ions & Water are lost in Sweat
- Sports drinks contain Sugars and Ions that we loose in sweat helping us hydrate in more ways than 1
- Exchange in the gut
- Food we eat is digested in the gut into small soluble molecules
- In the intestine these solutes are absorbed into the blood
- Food we eat is digested in the gut into small soluble molecules
- Exchange in Plants
- Stomata
- Stomata are tiny holes in the leaves
- Gases diffuse in & out of leaves through Stomata
- Stomata are controlled by Guard cells that open and close
- Plants lose water vapour through Stomata
- Efficiency
- Leaves flat and very thin
- Internal Air spaces
- Leaves flat and very thin
- Stomata
- Active Transport
- Water diffuses through a Semi Permiable Membrane
- Osmosis
- Osmosis Is movement of Water
- Osmosis
- Ions and Glucose can be absorbed via Active Transport
- Surface Area is increased in the lungs by Alveolar (Air Sacks)
- The Lungs contain the Gaseous Exchange
- The Lungs
- Gaseous exchange is the exchange of gases
- Carbon Dioxide is exhaled by the Lungs
- Oxygen is absorbed in lungs
- Oxygen diffuses into the many capillaries ready for respiration
- Carbon Dioxide diffuses from blood back out to Lungs ready to be exhaled
- The Lungs
- Carbon Dioxide diffuses from blood back out to Lungs ready to be exhaled
- The Villi are the exchange surface for food molecules
- Villi
- Villi are finger like projections
- Villi increase the surface area of the small intestine greatly
- Villi
- Villi are finger like projections
- Villi
- Villi increase the surface area of the small intestine greatly
- Villi have a rich blood supply maintaining a steep concentration gradient
- Oxygen
- Needed for Respiration
- Waste product of Photosynthesis
- Gases
- Carbon Dioxide
- Needed for Photosynthesis
- Waste Product of respoiration
- Oxygen
- Needed for Respiration
- Waste product of Photosynthesis
- Carbon Dioxide
- Carbon Dioxide
- Needed for Photosynthesis
- Waste Product of respoiration
- Stomata can open or close depending on water levels
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