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									CHAPTER 3 WORKSHEET & READING GUIDE – THE CELL
1.   What are the three foundations of cell theory?




2.   What is the difference between prokaryotic and eukaryotic cells? What type of cells are human cells?



3.   How big are cells?



4.   Draw a phospholipid bilayer with embedded proteins, carbohydrates, and cholesterol. Label the region
     that is hydrophobic and the regions that are hydrophilic. Label one side the intracellular fluid/cytoplasm
     and one side the extracellular fluid.




5.   Describe the “fluid mosaic” model in your own words.



6.   What are five functions of plasma membranes?




7.   Complete the following chart:

Type of            With/Against            Energy           Types of          Description & Example
membrane           Concentration           Source           molecules
transport
         Gradient
Simple
diffusion

Facilitated
diffusion
Osmosis

Active
transport
Endocytosis

Exocytosis
8.    What would happen if you placed a cell in a high salt solution? What would happen if you placed a cell in
     a low salt/pure water solution?



9. Define compartmentalization.



10. Define organelle. Which is LARGER, an organelle or a cell?



11. Identify the following cell parts:

____________________a. External boundary of cell; regulates flow of materials into and out of the cell; site of
                       cell signaling

____________________b. Contains digestive enzymes of many varieties, “suicide sac” of the cell, breaks
                       down proteins

____________________c. Scattered throughout the cell; major site of ATP or energy synthesis

____________________d. Membranous system consisting of flattened sacs and vesicles; modify and
                       packages proteins for export (exocytosis)

____________________e. Control center of the cell; necessary for cell division and life, contains DNA

____________________f. Dense, darkly stained region within the nucleus; packaging site for ribosomes

____________________g. Site of protein synthesis

____________________h. 46 threadlike structures in the nucleus; contain genetic material

____________________i. Found in cilia and flagella

____________________j. Extensive network of channels connecting all parts of the cell. Often appear rough
                       due to the presence of ribosomes.



12. Describe cellular respiration –the starting materials, the major events, and final purpose.




13. Describe lactic acid fermentation - the starting materials, the major events, and final purpose.

								
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