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Transcript
Name________________________________________ Model 5- Cell Structure and Function Review Date_______ 1) Why is a cell membrane a phospholipid bilayer instead of a monolayer? Why does it assume that configuration? 2) Based on the structure of the cell membrane, explain why these substances will or won't diffuse through the cell membrane (NOTE: they are not using channels). Molecule Will or Won't Reason diffuse through Won't Glucose Too big Water Protein Salt Carbon dioxide 3) Identify the initial solutions as isotonic, hypotonic or hypertonic. Justify your answer and complete the storyboards. Key b, c, and d the same as for a. a. External Molecular Internal Initial Key: Water Intermediate Sugar Salt + &- Final Protein Name________________________________________ Model 5- Cell Structure and Function Review Date_______ b. + External + - Molecular Internal Initial Key: Water Intermediate Sugar Salt Final Protein c. External Molecular Internal Initial Intermediate Final Initial Intermediate Final Key: d. External Molecular Internal Key: Name________________________________________ Model 5- Cell Structure and Function Review Date_______ 4) Storyboard the motion of molecules when a potato is allowed to sit in open air and dehydrates. External Internal Initial Intermediate Final Key: a. Is the solute concentration inside the potato cells more or less after dehydration?. Explain your reasoning. Name________________________________________ Model 5- Cell Structure and Function Review Date_______ 5) Look at this storyboard of a cell in solution. In the initial storyboard, label cell wall, cell membrane, cytoplasm, nucleus, chloroplasts, as appropriate. a. Is this an animal or plant cell? How do you know? External Cellular Internal Initial External + Intermediate - + + - + Final - - - - + Molecular Internal Initial Key: Water: Intermediate Sugar: Protein: Final Ions: + & - b. Describe what happens to this cell and explain why that is happening. c. Describe what happens to the cell membrane and explain what property of the membrane allows it to change shape. d. Is the cell in a hypotonic, hypertonic or isotonic solution? Justify your answer. e. Why should you not drink saltwater if you are adrift at sea? Explain. + 6. For each of the structures below, state the function and how it relates to sustaining life. a. Cell membrane b. Nucleus c. Rough Endoplasmic Reticulum d. Smooth Endoplasmic Reticulum e. Ribosomes f. Golgi Apparatus g. Lysosomes h. Peroxisome i. Vacuole j. Mitochondria k. Chloroplast l. Cell Wall Name________________________________________ Model 5- Cell Structure and Function Review Date_______ Complete the table below. Representation Numerical 0.1M Sucrose 0.45M Sucrose Verbal 0.9M Sucrose Isotonic Pictorial: S Organism C A L Cellular E Molecular + - E + - I Graphical Shown above Shown above Shown above 7) If you repeated the potato core lab using cores that were half the volume of the ones you used in the potato core lab, what do you think would happen to your graphs compared to the ones you generated in the original lab? Explain. 6
