active transport

• what is active transport

  the transportation of ions against the concentration gradient
• is active transport passive or does it require energy

  requires energy in the form of ATP
• what what element causes the production of ATP to stop

  cyanide
• where does energy come from with ATP

  hydrolysis of atp
• what substances are transported by active transport

  charged ions and polar molecules that are insoluble in lipids
• what is the first step of active transport

  the molecule or ion binds to the carrier protein on the outside of the cell membrane
• what is the step of active transport after the molecule is binded to the carrier protein

  ATP transfers a phosphate group to the carrier protein
• what happens after ATP is transferred to the carrier protein in active transport

  the carrier protein changes shape and carries the ion or molecule across the cell membrane
• in what way is active transport similar to facilitated diffusion

  uses of proteins in cell membrane involves charged ions and small molecules
• how is active transport different to facilitated diffusion

  it works against concentration gradient and requires energy
• what are the properties substances transported by active transport

  large polar molecules and charged ions
• give some examples of processes that involve active transport

  muscle contraction , nerve impulse transmission and mineral ion uptake in plant toots