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Beatty
Ch. 5 Lecture Notes
| Question | Answer |
|---|---|
| Membranes are composed of _______________ and _______________. | phopholipids adn proteins |
| Many phospholipids are made from ___________ that have ________ in their tails | unsaturated fatty acids; kinks |
| Membranes contain ______________ which are proteins present in teh plasma membrane that span the length of the bilayer. | integrins |
| Integrins attatch to the __________ on the outside of the cell adn to the _________ on the inside of the cell. | extracellular matrix; cytoskeleton |
| These give the membrane a stronger framework | Intefrins |
| ____________are present in the membrane, which are proteins with sugars attached to one end. | Glycoproteins |
| Glycoproteins serve as ______ that specifically recognized by membrane proteins of other cells. | identification tags |
| Carbs that are part of the _________ are significantly involved in cell to cell recognition | extracellular matrix |
| Cells of the immune system recognize and reject foreign cells through the specific glycoprotein _________ | tags |
| Functions of membrane proteins: | 1. enzymes2. signal transduction3. transport |
| Membranes allow some substances to cross or be transported more easily than others, they exhibit _____________ | selective permeability |
| ________ molecules cross the membrane easily. Examples are __________ | Nonpolar; CO2 and O2 |
| _______ molecules do not cross the membrane easily. Examples are ________ | Polar; glucose and other suguar |
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