protein binds to a particle and uses energy to move through the
cell membrane
Active transport:)
active transport
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
active transport
It requires energy, and a protein carrier molecule. The large particle binds to the protein carrier on the inside of the cell. It is then transported across the membrane as a result of a conformational change in the protein (think of it flipping), and then it is released on the outside of the cell. Again, this requires some source of energy.
It requires energy, and a carrier protein. The large particle binds to the carrier protein on the inside of the cell. The protein then changes conformation, thus moving the particle to the outside, where it is dropped off by another conformational change in the protein.
Active transport
passive transport
Passive Transport
In an active transport, the cell uses energy (ATP) to transport the particle into the cell. Also, the particle moves through a "hallway" type thing. In a passive transport, the cell does not need energy (ATP) to transport the particle into the cell. Also, the particle just bursts through the cell membrane to get inside.
passive transport
Passive Transport