active transport

• in active transport, the particles move against the concentration gradient, therefore the process must use energy
• what is active transport


  the movement of dissolved molecules in/out of a cell through the cell membrane, from an area of low concentration to an area of high concentration
• how do root hair cells take in minerals


  using active transport, as the concentration of minerals is usually higher in the root hair cell than in the soil around it.
• active transport allows plants to absorb minerals from a very dilute solution, against a concentration gradient.
• active transport needs energy from respiration to make it work
• where does active transport happen in humans


  the gut, when there is a lower concentration of nutrients in the gut, but a higher concentration of nutrients in the blood.
• active transport allows nutrients such as glucose and amino acids to be taken into the blood, despite the concentration gradient being the wrong way. this means glucose can be taken into the bloodstream from the gut even if the concentration in the blood is higher, where it can be transported to cells for respiration.