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jnLonhgonocolewis
jnLonhgonocolewis jnLonhgonocolewis
  • 10-10-2015
  • Biology
Answered

When does the cell have to use active transport ?

Verified Answer :

haneul
haneul haneul
  • 10-10-2015

The cell has to use active transport when it's trying to transport material against the concentration gradient. (from low to high concentration) Or, if a molecule is too big to diffuse through the cell membrane, it must be moved through using a carrier protein.
Hope that helped you.

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