Now, don't make me get confused. Last time, I made it clear that I understood the meaning of passive transport. It does not require any energy. How come this active transport need energy to carry out movement?
Oh! Because active transport moves against the concentration gradient. If you think deeper, it is not that difficult to understand. We also need energy to fight against something. Examples of active tranport are sodium-potassium pump, movement in vesicles and membrane receptor proteins. The animation of sodium-potassium pump showed in class really illustrated clearly the movement of the pump. The powerpoint also helped a lot.
In my opinion, passive transport is easier to understand because the demonstration in class and the example of bouncing balls let me have the picture of what's going on. Overally speaking, this chapter is not very hard. I am looking forward to the next chapter - chromosomes.
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