Rate of active transport

• what does NOT affect the rate of active transport?


  When active transport moves molecules and ions AGAINST their concentration gradient, a decreasing concentration gradient doesn't affect the rate of active transport
• what is the rate of active transport affected by?


  • the speed of individual carrier proteins
  • number of carrier proteins present
  • the rate of respiration in the cell and the availability of ATP
• Why is the rate of active transport affected by the speed of individual carrier proteins?


  the faster they work, the faster the rate of active transport
• Why is the rate of active transport affected by the number of carrier proteins present?


  the more proteins there are, the faster the rate of active transport
• Why is the rate of active transport affected by the rate of respiration in the cell and the availability of ATP?


  If respiration is inhibited, active transport can't take place