Explain how membrane proteins play a role in facilitated diffusion of charged and polar molecules in general and in relation to the specific molecules below.
Glucose transport: These transport proteins are integral membrane proteins that allow glucose to pass through the hydrophobic [glucose is a hydrophilic polar molecule] regions of a cell membrane by creating a polar pathway for the molecule to pass through.
Na+/K+ transport: The sodium-potassium pump is activated by ATP and pumps two K+ ions into the cell as three Na+ ions leave the cell. The following link will take you to a very helpful and informative animation that is followed up with a mini quiz.
http://highered.mheducation.com/sites/0072495855/student_view0/chapter2/animation__how_the_sodium_potassium_pump_works.html
No comments:
Post a Comment