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Virtual Cell Lab General biology- LCS

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Cells Alive http://www.cellsalive.com/cells/cell_model.ht m http://www.cellsalive.com/cells/cell_model.ht m

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Bacteria Slides

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E. Coli

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Questions: 1.Are bacterial cells prokaryotic or eukaryotic? 2.What are the three shapes of bacterial cells? 3.Name the three exterior possibilities present in bacterial cells. 4.Do bacterial cells have membrane bound organelles? Do they have a nucleus? Nucleolus? 5.In which foods might you find E. Coli?

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Cork

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Plant Cells

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Elodea plant

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Elodea cells

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Cytoplasmic streaming Cytoplasmic streaming is the directed flow of cytosol (the liquid component of the cytoplasm) and organelles around large fungal and plant cells. This movement aids in the delivery of nutrients, metabolites, genetic information, and other materials to all parts of the cell. Cytoplasmic streaming occurs along Actin filaments in the cytoskeleton of the cell. Cyclosis is the circulation or streaming of the cytoplasm within some living cells. In plant cells, chloroplasts may be moved around with the stream, possibly to a position of optimum light absorption for photosynthesis. The rate of motion is usually affected by light exposure, temperature, and pH levels.cytosolcytoplasmActincytoskeletoncytoplasmcellschloroplaststemperaturepH

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Cytoplasmic streaming http://www.youtube.com/watch?v=8edk6nG MwMs http://www.youtube.com/watch?v=8edk6nG MwMs

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Questions: 6.Is cork alive or dead? 7.Describe the shape of a plant cell. 8. What is the main component of a cell wall? 9.Explain why you could not use an oak leaf to view plant cells. 10.Describe the arrangement of the onion cells. 11.Even though the plant cell is only one cell thick, you cannot bring all the nuclei in the field of view into focus at one time. Why? 12. Describe the event of cytoplasmic streaming. 13.Which part of the plant cell contains chlorophyll? 14.Why is the vacuole so large in plant cells?

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Cilia and flagella

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Euglena

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Euglena in motion http://www.youtube.com/watch?v=0rNI8Bos_ BQ http://www.youtube.com/watch?v=0rNI8Bos_ BQ

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What human cells will have cilia? In humans, for example, motile cilia are found in the lining of the trachea (windpipe), where they sweep mucus and dirt out of the lungs.humanstrachea In female mammals, the beating of cilia in the Fallopian tubes moves the ovum from the ovary to the uterus. [7]femalemammals Fallopian tubesovum ovaryuterus [7]

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Questions 15. What is the function of cilia? Flagella? 16.How are cilia and flagella similar in construction? 17.How are cilia and flagella different? 18. What is the function of the cilia on cells lining the human respiratory tract?

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Animal Cells- human epithelial

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Animal cells- human epithelial

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Human blood

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sperm

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Ovary cross section

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Questions 19. Where is the nucleolus found and what is its function? 20.How are plant and animal cells similar in structure? 21.What is the advantage of using a wet mount preparation instead of a dry mount in the study of living cells? 22. Why are stains used in viewing cells? 23. Red blood cells do not have nuclei at maturity. These cells are packed with hemoglobin that functions in oxygen transportation. Why is the absence of a nuclei at maturity an advantage? 24. Define phagocytosis in terms of white blood cells. 25. How are egg cells structurally adapted to serving their main function?