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Active Transport
ACTIVE TRANSPORT is the net movement of particles from an area of LOW concentration to an area of HIGH concentration using energy from RESPIRATION.
- Active transport involves particles moving AGAINST a concentration gradient (From a low to high concentration)
- Moving AGAINST a concentration gradient does not happen naturally as it is NOT a PASSIVE process like diffusion (moving from a high concentration to a low concentration)
- This means that ENERGY is required for active transport.
Example: Root cells use active transport to take in MINERALS
- Minerals are usually at a higher concentration in root hair cells than in the surrounding soil.
- Since diffusion can't occur against the concentration gradient, root hair cells use ACTIVE TRANSPORT to absorb minerals from the surrounding soil.
- This process allows plants to absorb essential nutrients from a very dilute solution (low concentration) in the soil.
Example: Humans absorbing GLUCOSE from the gut.
- In the human gut, when there's a lower concentration of nutrients compared to the blood, ACTIVE TRANSPORT allows nutrients, including glucose, to be absorbed into the bloodstream.
- This is essential for providing ENERGY to our cells, even when the concentration gradient is the opposite direction of diffusion.
Active Transport
ACTIVE TRANSPORT is the net movement of particles from an area of LOW concentration to an area of HIGH concentration using energy from RESPIRATION.
- Active transport involves particles moving AGAINST a concentration gradient (From a low to high concentration)
- Moving AGAINST a concentration gradient does not happen naturally as it is NOT a PASSIVE process like diffusion (moving from a high concentration to a low concentration)
- This means that ENERGY is required for active transport.
Example: Root cells use active transport to take in MINERALS
- Minerals are usually at a higher concentration in root hair cells than in the surrounding soil.
- Since diffusion can't occur against the concentration gradient, root hair cells use ACTIVE TRANSPORT to absorb minerals from the surrounding soil.
- This process allows plants to absorb essential nutrients from a very dilute solution (low concentration) in the soil.
Example: Humans absorbing GLUCOSE from the gut.
- In the human gut, when there's a lower concentration of nutrients compared to the blood, ACTIVE TRANSPORT allows nutrients, including glucose, to be absorbed into the bloodstream.
- This is essential for providing ENERGY to our cells, even when the concentration gradient is the opposite direction of diffusion.
