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1. Plasma mem- barrier, selectively permeable, dynamic role in cellular activity, provides biological
brane markers
2. Plasma mem- lipids (glycolipids, phospholipids, cholesterol)
brane compo-
nents
3. Phospholipids membrane lipids with lipid tails and phosphorus heads
4. Lipid tails hydrophobic (water shunning)
5. Phosphorus hydrophillic (water attracting)
heads
6. Glycolipids lipids with bound carbohydrate chains
7. Cholesterol lipid that stabilizes the membrane and provides structural integrity
8. Integral proteins firmly embedded transmembrane proteins protruding from membrane on both
sides
9. Integral Protein recognition, transportation, enzymes, cell adhesion
functions
10. Peripheral pro- loosely attached to external membrane, common between cells and external
teins environment
11. Peripheral pro- support structural integrity
tein functions
12. Glycoproteins attached carbohydrate chains, part of glycalyx
13. Glycoprotein communication, immune response, cell identification (biomarkers)
functions
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14. Glycocalyx carbohydrate area on the cell surface used for biomarkers
15. Glycocalyx func- provide biomarker for cell recognition and interaction
tions
16. Microvilli membrane folds that increase surface area for absorption
17. Tight junction impermeable watertight junction of interlocking proteins, keeps pathogens or
large molecules from seeping in
18. Tight junction lo- digestive system, blood/brain barrier
cation
19. Desmosome anchoring junction that helps tissue resist tearing, "loose" connection to keep
from tearing
20. Desmosome lo- skin and muscle tissue
cation
21. Gap junction collection of hollow protein channels for substance transport
22. Gap juction loca- electrically excited tissues (cardiac and smooth mucle)
tion
23. Connexons specific protein channels found in gap junctions
24. Simple diffusion substances diffusing directly through the lipid bilayer, no outside energy needed,
non-polar and lipid-soluable substances (exception of H20)
25. Facilitated diffu- transport using carrier or channel proteins for large or polar molecules, uses no
sion energy, large, polar molecules, limited by number
26. Osmosis diffusion of water across a semipermeable membrane, occurs when different
water concentration
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