Transport Mechanisms 2 Flashcards
Allow the cell to regulate what solutes enter/exit the cell and the quantity being transported.
TRANSPORT MECHANISM
Kinds of TRANSPORT MECHANISMs:
Passive transport
Active transport
Bulk transport
Passive transport examples
Diffusions
Osmosis
This type of transport relies on the concentration gradient of solutes to move them across the plasma membrane.
Passive transport
No energy will be spent to move the solutes across.
Passive transport
The movement of ions and molecule from high concentration to low concentration is know as
Simple diffusion / diffusion
Don’t rely / use / go through the protein channel
Simple diffusion / diffusion
is the natural tendency for molecules to move constantly.
Diffusion
Their movement is random and is due to the energy found in the individual molecules.
Diffusion
Occurs when the materials on one side of the membrane have a different concentration than the materials on the other side.
Net diffusion
Movement of particles from high to low concentration
Diffusion
Ion channels inside aid the charged ions to move across.
Facilitated diffusion
Proteins manage and assist the movemement of solutes across the membrane.
Facilitated diffusion
Assisting of larger macromolecules
Facilitated diffusion
Two types of facilitated diffusion
Channel protein
Carrier protein
Proteins provide a small hyrophilic passageway for specific molecules and ions.
Channel protein
Some channels can remain open most of the time (leak channels), while others can be opened or closed (gate channels) depending on the presence of a stimulus.
Channel protein
Some channels can remain open most of the time (————), while others can be opened or closed (————) depending on the presence of a stimulus.
leak channels
gate channels
Require the molecule being transported to attach itself to the ———. The protein will then change its shape (conformational change) to shuttle the molecule across the membrane.
Carrier protein
Require the molecule being transported to attach itself to the carrier protein. The protein will then change its shape (—————) to shuttle the molecule across the membrane.
conformational change
