1. Cell Structure and Function Biology 11

2. Warm up! A student observed a cell that covered 50% of the high power field of view. Calculate Actual Size. If the same student drew a diagram of the cell that measured 10.0cm calculate the Scale of the diagram. Given: Low power f.o.v. = 4.4mm

3. Question: How does the nucleus “control” the cell? 1.Nucleus is full of DNA 2.DNA strands have genes 3.Nucleolus has RNA 4.RNA copies part of the DNA 5.That copy is the instructions to produce proteins 6.Proteins are used for most functions of the cell

4. Smooth Endoplasmic Reticulum (Smooth E.R.) Huge surface area for chemical reactions to take place. Can have different functions depending on the cell type. Examples: Synthesis of lipids Metabolism of carbohydrates Detoxification of drugs / poisons

5. Smooth E.R.

6. Lysosomes Membrane enclosed sacs of digestive enzymes. These enzymes can digest lipids, proteins, complex carbohydrates and nucleic acids! Functions: Digest old cell parts Intracellular digestion example: WBC’s Development

7. Protoplasm Protoplasm = Cytoplasm + Nucleoplasm Cytoplasm = Cytosol + Organelles

8. Q: Why do people with Cystic Fibrosis take digestive enzymes? A: Cystic fibrosis can cause digestive problems because thick, sticky mucus affects the function of the pancreas. This mucus blocks the ducts of the pancreas, preventing pancreatic enzymes from reaching the intestines to aid digestion. Babies with C.F. may have meconium ileus, a blockage of the intestine - shortly after birth. Source: http://ghr.nlm.nih.gov/condition/cystic-fibrosishttp://ghr.nlm.nih.gov/condition/cystic-fibrosis *F.Y.I. Pancreatic juices include a number of enzymes including peptidases, pancreatic lipase and amylase!

10. Exit Ticket Explain how the following cell parts work together: Nucleus DNA Rough ER Ribosome Vesicle Golgi

11. Modifies, stores and transports cell products (mostly protein) Part of endo-membrane system!

12. Mitochondria Site of cellular respiration  converts chemical energy into ATP (usable energy) Double membrane organelle, contains own DNA and ribosomes.

13. Chloroplasts Contain chlorophyll Site of photosynthesis  converts solar energy into chemical energy Double membrane organelle, contains own DNA and ribosomes.

14. Mitochondria & Chloroplast Working Together http://www.teachersdomain.org/asset/lsps07_in t_cellenergy/

15. Cytoskeleton Notes

16. 1.How would you decide if something is living? Can you easily define life? 2.Why is the nucleus nicknamed the “control centre” of the cell? How exactly does it control the cell? 3.Explain the importance of energy to living things. Be sure to mention the three main types of energy in your answer. 4.What is metabolism? Why could you consider this the most important life activity? 5.Explain how the following organelles could work together: cell membrane, lysosome, vesicle, mitochondria and ribosome. 6.How are proteins destined for export from a cell typically modified prior to secretion? 7.A cell is like a small community. Identify five cell parts that have a similar function to parts of your community. 8.List three cell structures that have folded membranes. Explain how the folded membranes help each structure function.

17. Stem Cell Video http://www.pbs.org/wgbh/nova/sciencenow/3 209/04.html http://www.pbs.org/wgbh/nova/sciencenow/3 209/04.html

18. Explain how the following organelles could work together: cell membrane, lysosome, vesicle, mitochondria and ribosome.