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Chapter 3: The Cell

ANPY 101 Ivy Tech

QuestionAnswer
Parts of Cell Plasma/Cell Membrane, Cytoplasm (cytosol and organelles except for the nucleus), Nucleus
Levels of Complexity organelles - cells - tissues - organs - organ system
Three types of lipid molecules that make up lipid bilayer phospholipids - cholesterol - glycolipids
Which of the three types of lipid molecules in the lipid bilayer are amphipathic molecules? phospholipids
Define amphipathic. Polar and non-polar parts, the polar "head" pointing out and the non polar tail pointing toward the center of the layer
Weakly amphiphotic molecules that are interspersed among other lipids in the lipid bilayer cholesterol
Type of lipid molecules that only appear in the membrane layer which faces the extracellular fluid Glycolipids
Ratio of lipid to protein in plasma membrane. 50:50
What is the flexible but sturdy barrier that surrounds the cytoplasm of the cell? Plasma membrane
What percentage of lipids in lipid bilayer are phospholipids? Cholesterol? Glycolipds? 75% - 20% - 5%
Type of lipid molecule that is interspersed amount the other lipids in both layers of the cell membrane. Cholesterol
Type of lipid molecule (carbohydrate groups) in cell membrane that forms a polar head only on the side of the cell membrane facing the extracellular fluid. Glycolipids
The polar head of phospholipid is hydrophilic or hydrophobic? Hydrophilic
The polar tail of phospholipid is hydrophilic or hydrophobic? Hydrophobic
Are integral or peripheral proteins found at the inner or outer surface of the membrane? Peripheral
Do integral or peripheral proteins extend into or across the entire lipid bilayer among the fatty acid tails of the phospholipid molecules? Integral
Can integral or peripheral proteins be stripped away from the membrane without disturbing membrane integrity? Peripheral
Are cellular adhesion molecules peripheral proteins or integral proteins? Peripheral proteins
What are the functions of membrane proteins? Formation of channel Transporter protein Receptor protein Cell identity marker Linker - anchor proteins in cell membrane to other cells -allow cell movement -help maintain cell shape and structure Act as enzyme
Created by: spritle
 

 



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