Unit 5: Cells Mr. Nagel Meade High School

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1 Unit 5: Cells Mr. Nagel Meade High School

2 Hierarchy of Biology Organize the following from smallest to greatest: Tissue, atom, organism, organelle, organ, population, cell, community, ecosystem, organ system, molecule Provide an example of each!

3 Hierarchy of Biology From smallest to greatest: Atom Molecule Organelle Cell Tissue Organ Organ system Organism Population Community Ecosystem

4 Size and Scale

5 Size and Scale

6 Think What is the basic unit of living organisms? What are characteristics of living things?

7 Think What is the basic unit of living organisms? Cells! What are characteristics of living things? Living things are made of cells. Living things obtain and use energy. Living things grow and develop. Living things reproduce. Living things respond to their environment. Living things adapt to their environment.

8 Cell Theory

9 Cell Theory Cell Theory Cells are the fundamental unit of life. All living things are composed of cells. Cells can only come from pre-existing cells. What is the difference between a Law, Theory, and Fact? Why is this only a Theory?

10 Webquest Cells and Organelles

11

12 Prokaryotes v. Eukaryotes What is a prokaryote? What defines it? What is a eukaryote? What defines it?

13 Prokaryotic Cell (E. Coli)

14 Flagellum and Pili Some bacteria have one or more Flagellum. (motility) Pili are short fibers found on some bacteria. (cling)

15

16 Eukaryotes (Plants and Animals) Discuss with someone next to you differences between plant and animal cells. (Minimum 3)

17 Eukarytoic Cell (Animal)

18

19

20 Eukaryotic Cell (Plant)

21 Onion Cell

22

23 Cell Stats: Fun Facts Biggest Cell Giraffe Nerve (2m) Smallest Cell Bacteria (0.2µm)

24 Lipid Bilayer What is the Lipid Bilayer? Lipids Hydrophilic vs. Hydrophobic Proteins Allow for material to enter/leave Enzymes for some chemical reactions Sugars Allow for communication with other cells

25 Passive and Active Transport Passive (no Energy) Simple Diffusion Gated Channels [Smaller Molecules] Separate stimulus opens/closes door Facilitated Diffusion Protein changes structure to shuttle Active (ATP) Electrogenic pump (H+) Na (out) / K (in) pump

26 Diffusion and Osmosis Diffusion Molecules moving from higher to lower concentration. Osmosis is the diffusion of water molecules. Water moves in the opposite direction, as the molecules in question cannot due to a barrier Turgor Pressure Water pushing against cell membrane from inside

27 Vesicles [Larger/More Molecules] Exocytosis Secretion of proteins Endocytosis Internalization of materials Phagocytosis (food) Pinocytosis (fluids) Receptor-Mediated endocytosis (sensors)

28

29 The Role of Systems Part One 1.Provide evidence that an individual cell can be considered as a system itself, as part of a larger system, or as part of a multicellular organism by writing a journal entry 2.Explain how simple and complex organisms perform life functions by categorizing organisms and providing details of life functions 3.Describe the role of the cell membrane in excretion of materials by completing a journal entry. 4.Describe the roles of the excretory system by a completing a graphic organizer 5.Compare the three types of cellular movement by observing living organisms and writing a journal entry 6.Explain the interaction of the muscular and skeletal systems by examining movement in complex organisms. The Role of Systems Part Two 1.Describe the roles of the circulatory system by a completing a graphic organizer. 2.Describe the role of the cell membrane in transport of materials by investigating a unicellular organism 3.Analyze the effect of an abiotic factor on heart rate by designing and conducting a laboratory investigation. 4.Describe the role of vascular tissues by observing the movement of materials through a plant. 5.Describe the roles of the sensory organs and nervous system by conducting a laboratory investigation. 6.Explain how an organism maintains homeostasis by diagramming feedback loops and describing the role of the endocrine system. 7.Describe the effects of the endocrine system by conducting and analyzing a laboratory investigation on plants. Photosynthesis/Cellular Respiration 1.Explain the interdependence of plants and animals by completing a journal entry. 2.Describe the relationship between photosynthesis and cellular respiration. 3.Compare chemosynthesis and photosynthesis after reading technical selection. 4.Analyze the parts of the process of photosynthesis and relate the key molecules to the summary equation. 5.Analyze the effect of light intensity, colors of light or temperature on the rate of photosynthesis by designing and conducting an experiment. 6.Describe the materials and products of cellular respiration by viewing and explaining a demonstration. 7.Identify ATP as the energy carrier molecule by drawing a diagram. 8.Compare anaerobic and aerobic respiration by completing a graphic organizer and performing a laboratory investigation. 9.Compare photosynthesis and cellular respiration by responding to a BCR 10.Analyze the effect of temperature changes on the rate of aerobic respiration in germinating seeds by conducting a laboratory investigation.

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