Figure 13. Liver Cell.
Figure 13. Liver Cell.
Figure 14. Eukaryotic Cell Membrane or Plasma Membrane
Cell or plasma membrane contains equal amounts of lipids and proteins, which are arranged in a
bilayer. Plasma membrane is semi-permeable and contains transport systems for ions, sugars,
and amino acids.
Figure 19. Eukaryotic cell - Endoplasmic Reticulum
Endoplasmic Reticulum is a single membrane system with an inner compartment which forms
channels throughout the cytoplasm of the cell.
Smooth endoplasmic reticulum (E.R.) provides the cell an organic phase in its membranes and unsaturated fatty acids and cholesterol are synthesized here. Foreign organic compounds are hydroxylated here to make them easier to digest.
Rough endoplasmic reticulum is a single membrane system covered with ribosomes for the synthesis of proteins to be exported from the cell. Eukaryotic ribosomes are very similar to prokaryotic ribosomes.
Figure 20. Eukaryotic Cell - Golgi Complex
Rough ER is connected to the golgi complex which is the system used for exporting proteins from
the cell and into the plasma membrane.
Figure 21. Eukaryotic Cell - Cytosol
The cytoplasm contains many enzymes and other compounds of the major aqueous phase of the
cell. There are ribosomes floating freely in the cytoplasm which are for synthesizing soluble
proteins. The cytoplasm is dispersed among the organelles and also contains the cytoskeleton
which helps the cell keep its shape.
Figures 3-10; and 13-25 are modified from Lehninger, Biochemistry, ©19??, Worth Publishing Co.
©Wilbur H. Campbell, 1995, 1996; wcampbel@mtu.edu
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