Term
| PLASMA MEMBRANE a fluid phospholipid bilayer WHICH MEANS |
|
Definition
•polar head of phospholipid is hydrophilic
• nonpolar tails are hydrophobic (tails face inward) |
|
|
Term
| plasma membrane is selectively permeable which means |
|
Definition
| only certain substance can pass through |
|
|
Term
|
Definition
| steroid molecules that lend support to membrane; prevent phospholipids from binding |
|
|
Term
|
Definition
lipids w/carb attached; serve as markers
Like a flag
If the white blood cells see something that doesn’t have the right flags, it will attack. |
|
|
Term
|
Definition
| protein w/carb attached; markers |
|
|
Term
|
Definition
| allow molecules to move across membrane |
|
|
Term
|
Definition
| combine with a molecule to help it move across the membrane |
|
|
Term
|
Definition
| have binding site for specific molecule |
|
|
Term
|
Definition
| carry out metabolic reactions |
|
|
Term
|
Definition
| form various types of junctions between cells problems w/membrane proteins |
|
|
Term
| What are two examples of diseases caused by malfunctioning proteins? |
|
Definition
Type 2 diabetes
Cystic fibrosis |
|
|
Term
|
Definition
Type 2 Diabetes:
– Insulin binds to receptor protein, but # of carrier proteins sent to the membrane is not enough
– Results in too much glucose in the blood: hyperglycemia
– Excess glucose expelled in urine
• Color blindness:
– Usually 3 types of photo pigment proteins in plasma membrane w/in photoreceptor cells: red, green, blue
– Some people lack functional red or green photo pigment |
|
|
Term
|
Definition
– Usually, chloride ions easily pass out of cell through plasma membrane channel protein
– When they don’t/can’t: thick mucus appears in lungs, damaging lungs
– Usually die young |
|
|
Term
|
Definition
molecules move from area of greater conc. To area to lower conc. Until equilibrium.
Molecules move from packed areas to more comfortable areas where they have more room to move. |
|
|
