co-transporters

• what are co-transporters?


  a type of carrier protein
• what are co-transporters a type of?

  carrier protein
• what do co-transporters do?

  Bind two molecules at a time
• How many molecules do co-transporters bind at a time?

  2
• How do co-transporters use concentration gradients?


  The conc gradient of one of the molecules is used to move the other molecule AGAINST its OWN concentration gradient
• Describe the co-transport of sodium ions and glucose?

  -Sodium ions move into the cell down their conc gradient

  -This moves glucose into the cell too, against its conc gradient