| Term | Definition |
|---|
| nucleus | almost all cells contain a single |
| largest membraane bound organelle | nucleus |
| primary function of nucleus | storage and transmission of genetic information for the next generation of cells |
| ribosomes | protein factories of the cell |
| plasma membrane | limiting barrier that covers cell surface |
| cell interior divided into | a number of compartments |
| cell organelles | membrane bounds compartments inside the cell |
| easch cell organelle performs | specific funtions to contribute to cell's survival |
| interior of cell divided into this many regions | 2- the nucleus and the cytoplasm |
| shape and location of nucleus | oval or spherical shaped, usually near center of cell |
| cytoplasm location | region outside the nucleus |
| cytoplasm contains | cell organelles and fluid surrounding the organelles known as cytosol |
| cytosol | fluid surrounding the cell organelles |
| intercellular fluid | refers to ALL the fluid inside the cell |
| intercellular fluid = | cytosol + fluid inside the organelles, including the nucleus |
| largest intercellular fluid compartment | cytosol |
| membranes | forms selective barriers around the cell and around cell organelles |
| membranes consist of this | double layer of lipid molecules containing embedded proteins |
| major membrane lipid | phospholipid- amphipathic |
| amphipathic | one side polar, other side non-polar |
| integral membrane protein | amphipathic, embedded, within lipid bilayer, cannot be extracted unless there is a disruption to the membrane |
| plasma membrane= | phospholipids, proteins and cholesterol |
| characteristics of lipid bilayer | fluid like- because no chemical bonds holding them together- allowing them to change shape considerably |
| 2 classes of membrane proteins | intergral- built in- and peripheral -outside |
| membrane protein that is amphipathic | integral membrane proteins |
| membrane protein that is NOT amphipathic | peripheral membrane proteins |
| integral proteins also referred as | transmembrane proteins |
| this kind of molecule does not diffuse - or only very slowly | most polar molecules |
| these molecules diffuse very easily across membranes | non polar molecules |
| these diffuse very well across plasma membranes even though they are very polar | ions (Na+, K+,Cl-) |
| proteins form this | channels for ions to flow through |
| size of channels does this | allows for some ions to come through, but not larger, organic molecules |
Combine with other sets
Share on Facebook
Share on MySpace
!