Across
- 2. membrane protein type; at membrane surface covalently linked to lipid(s) bilayer
- 6. model of proteins & lipids existing side-by-side
- 8. type of passive transport; substance moves through a pore/opening; small, uncharged
- 10. increases when heat increases
- 12. lipid arrangement; exists on the surface of water
- 13. lipid arrangement held together by non-covalent interactions; polar heads in contact w/ water, hydrophobic tails face each other
- 16. principal carrier of cholesterol in bloodstream
- 19. ATP-dependent; move PS from outer to inner leaflet
- 20. membrane protein type; embedded firmly in membrane; often transmembrane
- 21. fatty acid type; kinks cause packing disorder; more fluid
- 24. spherical lipid structure; nonpolar tails buried in the center
- 25. major interaction driving lipid bilayer formation
- 28. increases when rigidity increases
- 29. protein type; mediates entry of specific substances into cell
- 30. possess the most fluid membranes
Down
- 1. protein type; possess specific binding sites for extracellular substances
- 3. rule; polar (+) residues found more often on cytoplasmic face of transmembrane proteins
- 4. fluid matrix
- 5. ATP-dependent; move amphiphilic lipids from inner to outer leaflet
- 7. membrane protein type; loosely bound to the outside
- 9. enhances order and rigidity; in animal membranes
- 11. type of passive transport; substances enter cell by binding to carrier protein
- 14. membrane with fewer functions (ex. myelin sheath)
- 15. separate cells from external environment
- 17. active transport directly linked to hydrolysis of a high energy molecule like ATP
- 18. membrane carries out many enzyme-catalyzed reactions
- 22. substance is moved against a concentration gradient
- 23. substance enters a cell without energy expenditure; driven by concentration gradient
- 26. fatty acid type; linear arrangement of hydrocarbon chains; more rigid
- 27. active transport driven by proton gradient (ex. proton pumps)