Cell Processes Flashcards
The type of membrane protein spanning the plasma membrane is…?
Transmembrane protein
The type of membrane protein on each side of the plasma membrane is called…?
Peripheral protein
Integral membrane proteins may act as…?
Ion channels Carriers/transporters Junctions Enzymes Catalysts Cell markers
What is the process in which substances can cross the plasma membrane WITHOUT assistance of membrane proteins called?
Simple diffusion
What kind of substances are transferred across the cell membrane in simple diffusion?
Non-polar and hydrophobic
In facilitated diffusion, what are two forms that an integral protein can take?
Channel mediated
Carrier mediated
In channel mediated transfer, what substances are most likely to move down these channels?
Ions
Are ion channels selective?
Yes
What are some gated ions channels regulated by?
Chemical gradient
Electrical gradient
Electrochemical gradient
In carrier transport, how are solutes moved between different sides of the plasma membrane?
Concentration gradient
Carrier transport proteins must undergo a __ in order to bind to a substance?
Change in shape
Do carrier/transport proteins require energy to move substances across the plasma membrane?
No
What type of mediated transport is required for glucose transport into the cell?
Carrier transport
What carrier protein does glucose bind to on the outside of the plasma membrane?
GluT
What property of the plasma membrane is responsible for homeostasis of the cell?
Selective permeability
