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? –Individual cells: high chloroplast content and other features –Working together: difference between two major types of mesophyll cells http://www.uri.edu/cels/bio/plant_an atomy/images/01.gif https://faculty.unlv.edu/schulte/Anatomy/Leaves/PrivetLeaf.jpg

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

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

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

6. Clicker Time!!

7. Fiber cell in PapyrusStone cells in pears What do these cells do? Structural features: dead; very thick secondary cell wall Function: a)Decoration? b)Support / protection? c)Enlarging surface area? d)Water preservation? e)Other? 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

8. What do these cells do? Structural features: Tightly packed together; thick waterproof cuticle layer Function: a)Decoration? b)Support / protection? c)Enlarging surface area? d)Water preservation? e)Other? http://www.cas.muohio.edu/~meicenrd/anatomy/Ch 7_Protective/pcep.jpg http://www.uni- muenster.de/GeoPalaeontologie/Palaeo/Palbot/c ut1a.jpg

9. Structural features: sharp outgrowth Function: a)Decoration? b)Support / protection? c)Enlarging surface area? d)Water preservation? e)Other? What do these cells do? http://t1.gstatic.com/images?q=tbn:ANd9G cRrA2tze02y1uajzmDCObWYYXfhnL4Cu FIe72KwKcEINNGW47wq http://upload.wikimedia.org/wikipedia/c ommons/7/75/Arabidopsis-epiderm- and-trichome.jpg http://www.queensu.ca/biology/new s/sneddentrichome/trichome.gif http://www.namethatplant.net/Images/Ima gesTN/tn_mam/tn_mam_roughleafdog06 0310dz.jpg

10. Structural features: more delicate outgrowth Function: a)Decoration? b)Support / protection? c)Enlarging surface area? d)Water preservation? e)Other? What do these cells do? http://botit.botany.wisc.edu/Resources/Botany/ Root/Grass Root Tip/root hair.jpg http://www.bio.miami.edu/d ana/pix/roothairs.jpg http://www.amjbot.org/co ntent/90/6/823/F3.large.j pg

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

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