Figure 11-10 Comparison of a fat mole- cule(triacylglycerol)and a phospholipid molecule(phosphatidylethanolamine). The hydrophobic parts are shaded gray, CH,-NH and the hydrophilic parts are shaded pink. The fat molecule is entirely hydrophobic. whereas the phospholipid molecule is amphipathic.(The third hydrophobic tail C=0 of the triacylglycerol molecule is drawn here facing upward for comparison with the phospholipid,although normally it is CH2- CH-CH2 CH2一CH-CH2 depicted facing down.) 0 C=0 C=0 C=O C=O triacylglycerol phosphatidylethanolamine