This activity contains 5 questions.
In active transport,
no energy input is required from the cell.
molecules move across the plasma membrane by crossing the lipid bilayer directly, rather than by using a transport protein.
molecules move across the plasma membrane against their concentration gradient.
a vesicle inside the cell fuses with the plasma membrane and releases its contents outside the cell.
the plasma membrane forms a pocket that pinches inward, forming a vesicle that contains material from outside the cell.
A molecule moves down its concentration gradient using a transport protein in the plasma membrane. This is an example of
Water crosses the plasma membrane
through active transport.
against its concentration gradient.
through facilitated diffusion or diffusion.
using a process that requires energy from the cell.
The sodium-potassium pump uses energy from ATP to move sodium ions out of the cell, and potassium ions into the cell. This is an example of
The plasma membrane forms a pocket that pinches inward, forming a vesicle that contains material from outside the cell. This describes the process of
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