Term
| Plasma membrane is responsible for what? |
|
Definition
| the cell's ability to connect, recognize, and communicate with one another |
|
|
Term
| how much of the plasma membrane is made of lipids? |
|
Definition
|
|
Term
phospholipids are?
how many layers?
|
|
Definition
lipids joined with phosphate groups in the plasma membrane
-2 layers
|
|
|
Term
phospholipid layers:
head |
|
Definition
"hydrophilic"
-"water loving"
-made of phosphate
-polar |
|
|
Term
phospholipid layers:
tail
|
|
Definition
"hydrophobic"
-water fearing
-non-polar
-made of fatty acid chains |
|
|
Term
Cholesterol
where?
functions? |
|
Definition
interspersed between phospholipids
-keeps fatty acids from sticking together
-maintains flexibility and fluidity in the membrane |
|
|
Term
|
Definition
suspended within the plasma membrane
-integral (span entire length of membrane for ion channels)
-peripheral (attached to either inner or outer surface of PM) |
|
|
Term
| functions of proteins in plasma membrane? |
|
Definition
-attachment sites
-ion channel
-receptor molecule
-marker molecule |
|
|
Term
|
Definition
function of protein in plasma membrane
-allows ions to move into and out of cell (usually integral proteins)
|
|
|
Term
receptor molecule
example? |
|
Definition
protein function in PM
-serve for substances to bind to protein to cause chain of intracellular events
-ex: acetycholine (Ach) binds to specific protein receptor on surface of a muscle cell's PM. Chain of events occur (cascade) and then a contraction |
|
|
Term
marker molecules
ex?
what is basis of autoimmune disease?
oocyte? |
|
Definition
protein function in PM
-allow cellular recognition
-ex: immune system cells can recognize a foreign cell
-basis of autoimmune disease is breakdown of self cell recognition
-sperm cells can recognize oocytes |
|
|
Term
|
Definition
| a carbohydrate plus a lipid |
|
|
Term
|
Definition
| carbohydrate plus a protein |
|
|
Term
|
Definition
|
|
