Movement of molecules across a membrane from a region of lower concentration to a region of higher concentration
This requires energy from respiration
Against the concentration gradient
Movement from lower concentration to higher concentration
Root hair cells using active transport
Use it to absorb mineral ions such as magnesium and nitrate ions from the soil
Glucose is absorbed into the bloodstream from the gut. How are diffusion and active transport involved in this process
Glucose is absorbed by diffusion as there is a higher concentration in the small intestine than in the bloodstream
Once most of the glucose has been absorbed, however, there will be a higher concentration in the bloodstream so the remaining glucose will have to be absorbed by active transport
