Biology 8th Edition by Kenneth Mason ,Jonathan Losos,Susan Singer,Peter Raven,George Johnson

Exercise 17

The smooth endoplasmic reticulum is the site of synthesis of the phospholipids that make up all the membranes of a cell- especially the plasma membrane. Use the diagram of an animal cell (see figure 4.6) to trace a pathway that would carry a phospholipid molecule from the SER to the plasma membrane. What endomembrane compartments would the phospholipids travel through How can a phospholipid molecule move between membrane compartments
Figure 4.6 Structure of an animal cell. In this generalized diagram of an animal cell, the plasma membrane encases the cell, which contains the cytoskeleton and various cell organelles and interior structures suspended in a semifluid matrix called the cytoplasm. Some kinds of animal cells possess finger-like projections called microvilli. Other types of eukaryotic cells-for example, many protist cells-may possess flagella, which aid in movement, or cilia, which can have many different functions.