active transport

• what is active transport?

  the movement of molecules against their concentration gradient: moving from an area of lower concentration to an area of higher concentration.
• active transport requires energy from the cell so it is a active process
• active transport always takes place across a membrane e.g. cell membrane and always require special proteins that sit in the membrane transfer the molecules from one side to another
• energy for active transport comes from cellular respiration which is the process that happen mainly in the mitochondria when they break down glucose to release energy. cellular respiration is responsible for all energy the cell uses and stores the energy in little molecules called ATP. they transport the energy to the parts of the cell that need it
• active transport definition

  the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration and requiring energy from cellular respiration
• root hair cells use active transport to absorb mineral ions and are adapted for that role by having a large surface area and lots of mitochondria