| Term | Definition |
|---|
| eukaryotic, prokaroyotic | Two major classes of cells: ___ and ___ |
| nucleus, membrane, nucleus, membrane, structures | Eukaryotic cells (have a true __) have a nuclear ____ surrounding the cell __. They also contain __- bound __. |
| prokaryotic | What kind of cells lack membranous structures? __. |
| membranous | Prokaryotic cells, such as bacteria, lack _____ structures |
| cytoplasm, nucleus | Inside the eukaryotic cell are two main components (alphabetically) |
| nucleus | A membrane-bound structure that contains the genetic information for the cell. |
| cytoplasm | Everything inside the cell except the nucleus. |
| cytosol, organelles | The cytoplasm is made up of two components: __ and cell __. |
| cytosol | The fluid surrounding the organelles (in a cell) is called _____. |
| intracellular | ALL the fluid inside the cell, cytosol & fluid inside organelles and nucleus is referred to as ____ fluid. |
| membrane | A _____ functions as a barrier between compartments. |
| selective, passage | Membranes are ___, they allow _____ of some things and not others |
| plasma membrane, interstitial, in, out | The __ __ is the membrane that surrounds the entire cell (separating it from the ___ fluid) and regulates what comes __ and __ of the cell |
| lipid | All membranes consist of a double layer of _____ molecules |
| selective | The most important role of a plasma membrane is to act as a _____ barrier to the passage of molecules. |
| cholestrol, phospholipids, proteins, amphipathic | Plasma membrane consists of: ___, ___, and ___ (alphabetically), and an __ bi-layer (one polar, one non-polar) |
| fluid like | The lipid bilayer is ___-___ because - no chemical bonds link the phospholipids to each other or to the membrane proteins. |
| lipid | The ___ bilayer (of a plasma membrane) has the characteristics of a fluid (like a thin layer of oil on a water surface) |
| shape | The flexibility of the lipid bilayer allows cells to undergo considerable changes in ____ without disrupting their structural integrity. |
| amphipathic | The major membrane lipids (phospholipids) are what kind of molecules? |
| cell | This word means "a small chamber" |
| integral, peripheral | There are two classes of membrane proteins: ___ and ___ (alphabetically) |
| integral | Which membrane protein is embedded in the bilayer? |
| integral | Which membrane protein is amphipathic |
| integral | Which membrane protein cannot be extracted unless there's disruption to the membrane |
| peripheral | Which membrane protein is NOT amphipathic |
| peripheral | Which membrane protein does NOT associate with the non-polar interior regions of the membrane. |
| membrane surface | The peripheral membrane proteins are located at the ___ ___ bound to the polar regions of the integral membrane proteins. |
| bi-layer | Integral (or transmembrane) proteins are called this because they expand the whole length of the __-__. |
| amphipathic, lipid, membrane | Integral membrane proteins ARE __, are embedded within the __ bilayer, and cannot be extracted unless there's disruption to the ___. |
| amphipathic, non-polar, membrane surface | Peripheral membrane proteins are NOT __, do not associate with _--__ interior regions of the membrane, and are located at the __ __ bound to the polar regions of the integral membrane proteins. |
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