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CH6
Biology 1301
| Question | Answer |
|---|---|
| According to the fluid mosaic model of cell membranes, the fluid part of the model refers to ____. | the phospholipid molecules which vibrate, spin, and exchange places within the same layer, or leaflet, of the bilayer |
| The ____ component of the cell membrane functions as a selective barrier, while the ____ component has specific functions such as transport, recognizing other cells, and binding to other cells. | lipid, protein |
| What are the 4 functions performed by integral membrane proteins | cell adhesion, transport, signal reception, cell recognition |
| True or False: Glycoproteins are produced only on free ribosomes in the cytoplasm | False |
| In what way do the various membranes of a cell differ | Certain proteins are unique to each membrane. |
| What adaptations to the plasma membrane allows mammals to hibernate in subzero temperatures without their plasma membranes freezing? | Increase in both cholesterol and double covalent bonds in phospholipids. |
| The primary function of cellular membranes is ____ | the controlled transport of ions and molecules across the membrane |
| Movement of a substance from an area of low concentration to an area of high concentration using energy obtained from ATP is called ____. | active transport |
| What is absolutely necessary for diffusion to occur | a concentration gradient |
| A channel that opens in response to changes in ionic charge across a membrane is called a ____ | voltage-gated channel |
| Facilitated diffusion is specific. This means ____ | a specific protein will transport certain polar or charged molecules but not other |
| The movement of water across a membrane from an area of high to low water concentration is an example of ____. | osmosis |
| A red blood cell was placed in a beaker of solution. The cell immediately began to swell and ultimately burst. This happened because the cytoplasm of the cell was ____ to the solution in the beaker which was ____ | hypertonic; hypotonic |
| Distilled water would be considered ____ to body cells | hypotonic |
| ____ is the net movement of molecules or ions from a low concentration to a higher concentration | Active transport |
| The voltage across a membrane is called the ____ | membrane potential |
| The ____ is responsible for maintaining the membrane potential across the cell membrane. | Na+/K+ pump |
| Eukaryotic cells import large molecules through the process of ____ and secrete larger molecules by ____. | endocytosis; exocytosis |
| Pinocytosis and phagocytosis are accomplished in the cell by the ____ | plasma membrane |
Created by:
TejasRanger29
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