Plasma Membrane Flashcards
The basic structural framework the plasma membrane
Lipid Bilayer
The Lipid bilayer is made up of… (include ratios)
Phospholipids 75%
Cholesterol 20%
Glycolipids 5%
To have both polar and non polar sides is to be
amphipathic
The phosphate containing head is… (reaction to water )
Hydrophilic ( Polar )
The two long tails are… ( reaction to water )
Hydrophobic ( non polar )
Functions of the plasma membrane ( 4 functions )
- Acts as a barrier separating the inside from the outside of the cell
- Controls the flow of substances into and out of the cell.
- Helps identify the cell to other cells ( e.g., immune cells )
- Participates in intercellular signaling.
Proteins that span the entire lipid bilayer and protrude into both the cytosol and extracellular fluid are called.
Integral Protein ( AKA transmembrane protein )
Proteins that are attached to the polar side of the bilayer only is called a
Peripheral protein
Integral protein which have a carbohydrate group attached to it is called a
Glycoprotein
Integral protein that forms a pore through which a specific ion can flow to get across the membrane
Ion Channel
An integral protein that transport a specific substance can cross by undergoing a change in shape
Carrier
An integral protein that recognizes specific ligand and alters the cell’s function in some way
Receptor
a protein which can be both integral or peripheral that catalyzes reaction inside or outside the cell
Enzyme
a protein which can be both integral or peripheral which anchors filaments inside and outside the plasma membrane , providing structural stability and shape for the cell. may also participate in movement
Linker
Distinguish your cells from anyone else’s
Cell identity marker
the only proteins which can be both integral and peripheral are (2 answers)
Linker and Enzyme
The only protein which can be glycoprotein
Cell identity marker
