Unit Study Guide: Cells GHS Science Honors Biology UNDERSTANDINGS: A. Scientists use the scientific method to develop a hypothesis and design a controlled experiment to test that hypothesis. B. Living things depend on the structure and activities that occur inside cells. STUDENTS WILL KNOW: A. How to use the scientific method to identify and investigate complex problems. B. The cell theory C. The differences between prokaryotic & eukaryotic cells. D. The differences between plant, animal & bacterial cells. E. Identify & describe the role of the following organelles: a. Energy Production: mitochondria & chloroplasts b. Waste Disposal: Lysosomes c. Synthesis of New Molecules: Golgi Apparatus, Endoplasmic Reticulum, Ribosomes d. Storage of genetic material: Nucleus F. Semi-permeable cell membranes are responsible for materials moving into and out of the cells. These processes include: passive and active transport, and endocytosis and exocytosis. G. Cells in multicellular organisms specialize to form different tissues and organs. Examples include: nerve, red blood cell, muscle, gland and gametes. H. How the processes of osmosis and diffusion help a cell maintain balance I. How to use a compound microscope to identify microscopic specimens and calculate total magnification. Unit 2: Chapters 4 and 5 ESSENTIAL QUESTIONS: 1. What are the fundamental differences between eukaryotic and prokaryotic cells? 2. What are the fundamental differences between plant and animal cells? 3. How do cell structures relate to the survival of the cell and to the survival of living things? 4. How do cells sense and respond to their environment? STUDENTS WILL BE ABLE TO: 1. Analyze experimental data to evaluate the validity of a hypothesis. 2. Accurately graph data to reflect the relationship between independent and dependent variable(s). 3. Explain the key understandings of the cell theory. 4. Distinguish between major categories of cells (i.e. plant vs. animal cells, eukaryotic vs. prokaryotic cells, etc.). 5. Describe the interdependency of organelles within a cell, and their cooperative functions to maintain homeostasis. 6. Use a compound light microscope to identify microscopic specimens and calculate total magnification. 7. Describe how materials crucial to the cell enter and leave the cell, and explain why this process is important. 8. Distinguish between different types of cells within a human. 9. Predict how different environments will affect the size and shape of cells. UNIT VOCABULARY Eukaryotic Cell Prokaryotic Cell Cell (Plasma) Membrane Phospholipid Hydrophobic Hydrophilic Cell Wall Central Vacuole Chloroplast Mitochondrion Nucleus Organelle Ribosome Cytoplasm Osmosis Diffusion Facilitated Diffusion Semi-permeable Fluid Mosaic Model Endocytosis Exocytosis Passive Transport Active Transport Isotonic Hypertonic Hypotonic Homeostasis or Equilibrium Unit Study Guide Questions: Cells 1. Use the provided word bank to label the following diagram of a bacterium to identify its key structural components. (see page 55) WORD BANK: DNA / nucleoid region Cell Wall Pili / fimbriae Flagella 2. Compare and contrast: prokaryotic cells versus eukaryotic cells. Define each term, identify examples of each, and describe 3 differences between prokaryotic and eukaryotic cells. (see pages 55 – 57) _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 3. Identify and describe 4 features found in ALL cells, and therefore common to both prokaryotic and eukaryotic cells. _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 4. Compare and contrast plant cells versus animal cells. Identify examples of each, and describe 3 similarities AND 3 differences between plant and animal cells. (see pages 56-57) _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 5. Write each word or phrase from word bank below within the Venn diagram to show whether the characteristic belongs to one, two, or all three cell types. (see pages 55-69) WORD BANK: cell (plasma) membrane membrane-bound organelles eukaryotic cell cell wall chloroplast prokaryotic cell mitochondria ribosome has DNA nucleus cytoplasm central vacuole Plant cell Bacterial cell Animal cell 6. Label the pictures below to identify each as a plant cell or animal cell. Then, explain HOW you can tell. (see pgs 56-57) _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 7. Using the WORD BANK, identify the structural and functional components of the typical animal cell below. NOTE: Not all terms will be used!!! (see page 56 and your Cells Alive WebQuest). WORD BANK: Plasma Membrane Cell wall Central vacuole Centriole Chloroplast Cytoskeleton Golgi apparatus Lysosome Mitochondrion Nucleolus Nucleus Ribosomes Rough ER Smooth ER Peroxisome PLANT CELL 8. Explain what is meant by saying that the plasma (cell) membrane is “selectively permeable” and evaluate HOW the characteristic of selective permeability is essential to the function of the plasma membrane. (see pages 74-79) _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 9. Explain what is meant by describing the plasma membrane as a “fluid mosaic”. (see page 74) _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 10. Using the word bank, label the figure below to identify the basic structure of the plasma membrane. (see pages 41, 54, and 75) WORD BANK: fatty acid tail lipid bilayer hydrophilic phosphate group hydrophobic phospholipid The ___________________________ is _____________________________ The ___________________________ is _____________________________ 11. a) Describe TWO characteristics of a molecule that determine whether it can or cannot diffuse through the plasma membrane (see your Diffusion of Dyes Through a Membrane lab). _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ b) List specific examples of molecules that can and cannot diffuse through the plasma membrane. _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ 12. Predict the effect on a cell of being placed in a hypertonic, isotonic, or hypotonic solution (see pages 76-77 and your Osmosis Lab) a. Read the descriptions for the solutions in each of three containers below. b. On the provided blank line, write whether the solution is hypertonic, isotonic, or hypotonic. c. Draw what a human red blood cell, shown to the right, will look like after it is placed in each of the three containers with solutions shown below. Your drawings should show how cell size and shape would change (swell/lyse, shrivel, or remain the same). d. Add arrows to each of your drawings below that show the direction water will move. Water will move either into the cell, move out of the cell, or move in both directions equally (stay the same). ___________________________ __________________________ ___________________________ Concentration of water molecules is lower in the solution outside the cell than it is inside the cell. Concentration of water molecules is the same in the solution outside the cell as it is inside the cell. Concentration of water molecules is higher in the solution outside the cell than it is inside the cell. 13. Compare and contrast facilitated diffusion and active transport. How are they alike? How are they different? (see pages 77 – 78, 82) Facilitated Diffusion BOTH Active Transport 14. Compare and contrast exocytosis and endocytosis. (see page 79) ____________________________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________________________ ____________________________________________________________________________________________________________________________________ 15. Describe the three major types of endocytosis (see page 79, figure 5.9) 1.____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ ____________________________________________________________________________________________ 2._________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ 3._________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ 16. How do you calculate the total magnification when looking through a compound microscope? ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ 17. Match the cell type to its correct image by drawing a line to connect them and then write one function you would test to identify that particular type of cell. Textbook Reference Pages: Nerve cells (page 418, 565), red blood cell (pages 462-463, 479-480), muscle (page 418), gland (pages 433-437), and gametes (page 126-127). The first type of cell has been completed as an example. Cell type Gland I would test for the function of… Image of cell type secretion of products from the cell. Nerve (neuron) Red blood Muscle Gamete (egg) Gamete (sperm) Additional Activities/Labs/Worksheets you are responsible for… Cells Alive WebQuest (Be able to identify each cell structure and explain their functions.) Surface Area to Volume Activity Plant vs. Animal Cell Lab Diffusion Through a Membrane Lab Osmosis Lab Investigation For each lab, what does the DATA tell us? What observations were made? What was the goal of the lab activity?