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Pre-activity Assignment and Assessment

Pre-activity Assignment and Assessment. Activity: “ Cell Engineers and Cell Detectives ”. Post-activity Assessment Assessment Ask “ detectives ” to guess the function of the mystery cell, and explain why. Ask “ engineers ” to respond. Encourage discussions and clear up any misconceptions

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Pre-activity Assignment and Assessment

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  1. Pre-activity Assignment and Assessment Activity:“Cell Engineers and Cell Detectives” • Post-activity Assessment • Assessment • Ask “detectives” to guess the function of the mystery cell, and explain why. • Ask “engineers” to respond. • Encourage discussions and clear up any misconceptions • Mini lecture • Mesophyll cells (photosynthesis) vs. storage cells • Both have (different types of) plastids • Goblet cells vs. neuronal cells • Both have extensive ER/Golgi (one for secretion, one for making membrane) • Clicker activities • Guess the functions of a series of cell types with specific organelle contents and structural features • Conclusions and Perspectives • Linking micro (organelles and cell function) and marco (organism level) • Inspire students to think about bigger questions • How are cells different (differentiation) • How does one cell (zygote) make different cell types following a spatial and temporal program (development) • How have all these cell types come into being (evolution)

  2. What does a photosynthetic plant cell look like? http://www.uri.edu/cels/bio/plant_anatomy/images/01.gif https://faculty.unlv.edu/schulte/Anatomy/Leaves/PrivetLeaf.jpg • Individual cells: high chloroplast content and other features • Working together: difference between two major types of mesophyll cells

  3. What do these cells do? Avocado Potato http://www.emc.maricopa.edu/faculty/farabee/biobk/amyloplast.jpg http://nickrentlab.siu.edu/PLB400/Peterson_Images/Persea_Lipid.jpg • They also contain numerous plastids • Same type of organelle as chloroplasts • What do they do?

  4. What does a goblet cell look like? http://www.baileybio.com/plogger/images/anatomy___physiology/12._powerpoint_-_digestive_system/goblet_cell.jpg http://www.bio.davidson.edu/people/kabernd/BerndCV/Lab/EpithelialInfoWeb/goblet cells .jpg • High abundance of ER and Golgi • A trans Golgi apparatus cisterna is converted to mucinogen granules every 3 to 4 minutes during active secretion

  5. What do these cells do? http://www.columbia.edu/itc/hs/medical/sbpm_histology_old/micrographs/15.jpg http://cdn.head-fi.org/b/b0/200x200px-ZC-b0c4ee5f_ChkNFH-neuron1.jpg • High abundance of ER and Golgi • What do they do?

  6. Clicker Time!!

  7. What do these cells do? Fiber cell in Papyrus Stone cells in pears http://emp.byui.edu/wellerg/Cell Types and Tissues Lab/Images/Fiber.jpg http://emp.byui.edu/wellerg/Cell Types and Tissues Lab/Images/Sclerids.jpg • Structural features: dead; very thick secondary cell wall • Function: • Decoration? • Support / protection? • Enlarging surface area? • Water preservation? • Other?

  8. What do these cells do? http://www.cas.muohio.edu/~meicenrd/anatomy/Ch7_Protective/pcep.jpg http://www.uni-muenster.de/GeoPalaeontologie/Palaeo/Palbot/cut1a.jpg • Structural features: Tightly packed together; thick waterproof cuticle layer • Function: • Decoration? • Support / protection? • Enlarging surface area? • Water preservation? • Other?

  9. What do these cells do? Structural features: sharp outgrowth Function: • Decoration? • Support / protection? • Enlarging surface area? • Water preservation? • Other? http://upload.wikimedia.org/wikipedia/commons/7/75/Arabidopsis-epiderm-and-trichome.jpg http://www.queensu.ca/biology/news/sneddentrichome/trichome.gif http://t1.gstatic.com/images?q=tbn:ANd9GcRrA2tze02y1uajzmDCObWYYXfhnL4CuFIe72KwKcEINNGW47wq http://www.namethatplant.net/Images/ImagesTN/tn_mam/tn_mam_roughleafdog060310dz.jpg

  10. What do these cells do? http://botit.botany.wisc.edu/Resources/Botany/Root/Grass Root Tip/root hair.jpg http://www.bio.miami.edu/dana/pix/roothairs.jpg • Structural features: more delicate outgrowth • Function: • Decoration? • Support / protection? • Enlarging surface area? • Water preservation? • Other? http://www.amjbot.org/content/90/6/823/F3.large.jpg

  11. What do these cells do? http://lh5.ggpht.com/_wYv4UjyptOQ/TPMRfco0LpI/AAAAAAAAAzA/uJMDI2XWDr0/image131_thumb.png?imgmax=800 http://discoverysedge.mayo.edu/diabetes-metabolism/images/de10-4-diabetes-myofibril.jpg • Structural features: numerous mitochondria & myofibrils • Function: • Decoration? • Support / protection? • Enlarging surface area? • Water preservation? • Other?

  12. Summary • What have you learned today? • Relationship between organelle content, cell structure and cellular functions • What new questions do you have now?

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