1 / 20

SU: Cells – Copy, but answer during video, it will begin shortly

SU: Cells – Copy, but answer during video, it will begin shortly. How many cells are estimated in make up the human body? How many different types of cells are in the body? Red blood cells carry ________ through the body. White blood cells fight __________.

zudora
Download Presentation

SU: Cells – Copy, but answer during video, it will begin shortly

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SU: Cells – Copy, but answer during video, it will begin shortly • How many cells are estimated in make up the human body? • How many different types of cells are in the body? • Red blood cells carry ________ through the body. • White blood cells fight __________. • __________ are specialized structures inside eukaryotic cells • DNA is found in the ___________. • ____ is the “blueprint” of cells • Ribosome's make ____________. • Mitochondria create ________ for the cell. • Plants have ____________ that contain a green pigment. • The __________ is where water is stored in plant cells.

  2. Magic of Cells – Copy, Answer during video • What are the 3 basic characteristics of life displayed by all cells? • Prokaryotes are primarily of what type of organism? • How many cells are in the human body? • What are the 3 divisions found within the eukaryotic cell? • Define semipermeable. • What does organelle mean? • What is a vesicle? • What is the function of DNA within the nucleus? • What are the 3 organelles found only in plant cells? • What is the difference between cilia & flagella?

  3. SU: Semipermeable Membranes • Which process requires energy? • Diffusion • Facilitated diffusion • Active Transport • All of the above

  4. Factors affecting membrane permeability • Size • Solubility in lipids • Ionic charge • Presence of carrier proteins

  5. Do you understand the concept of concentration? • If I mix one part sugar to four parts of water, what is the concentration of the solution? • 20% Sugar solution • What is the solvent? • Water • What is the solute? • Sugar • How can I make the solution more concentrated? • Add more sugar or less water • Why don’t we call this a 80% water solution?

  6. Figure 7-17 Osmosis Osmosis – diffusion of water across a membrane Section 7-3 Water moves from higher concentration to lower concentration Water will tend to move across a membrane until EQUILIBRIUM is reached. ISOTONIC = “same strength” - SAME CONCENTRATION HYPERTONIC = “above strength” - MORE CONCENTRATION HYPOTONIC = “below strength” - LESS CONCENTRATION Higher Concentration of Water Water molecules Cell membrane Sugar molecules Lower Concentration of Water Go to Section:

  7. H2O H2O H2O • Osmosis - The movement of water through a selectively permeable membrane in the direction of the highest solute concentration (the diffusion of water). Which way will the water flow?

  8. Figure 7-17 Osmosis DIFFUSION – when particles tend to move from an area of higher concentration to an area of lower concentration. When the concentration is the same on both sides of the membrane – EQUILIBRIUM is reached Section 7-3 DOES NOT REQUIRE ENERGY Higher Concentration of solute solute Even when EQUILIBRIUM is reached, particles will continue to move across the membrane in both direction Is no further change to the CONCENTRATION Cell membrane Lower Concentration of solute Go to Section:

  9. Passive Processes- No energy required Diffusion- movement of molecules from an area of high concentration to low. Which way will the ammonia flow? • Facilitated Diffusion - Carrier proteins assist the diffusion of materials. e.g. glucose

  10. FACILITATED DIFFUSION • Some molecules can not freely pass through the cell membrane • PROTEINS in membrane will help or “FACILITATE” the movement of these molecules • Proteins act like CHANNELS OR “TUNNELS” so the molecules can pass in and out of cell • Even though it is fast & specific, • IT IS STILL DIFFUSION • SO IT DOES NOT REQUIRE ENERGY

  11. Figure7-20 Active Transport ACTIVE TRANSPORT Section 7-3 When particles move from a lesser concentration to a higher concentration OPPOSITE of DIFFUSION REQUIRES ENERGY Carried out by transport protein or “pumps” that are in the membrane Molecule to be carried Low Concentration Cell Membrane High Concentration Molecule being carried Low Concentration Cell Membrane High Concentration Go to Section: Energy Energy

  12. Active Processes - energy required Active Transport - the movement of molecules (atoms) across membrane from low concentrations to higher concentrations (against the concentration gradient). At rest, cells use up to 40% of their energy for this process. Carried out by membrane proteins

  13. Active Processes (continued) Endocytosis - surrounding a substance with some of the cell membrane and then, bringing it into the cell, within a vacuole. Phagocytosis - Solids Pinocytosis- Liquids Exocytosis - reverse of endocytosis.

  14. What’s next? • Section Assessment 7-4 • Study for Test • Make an outline of all the topics we have discussed in class. • From Handouts • Notes • Organelle Project/Flash Cards

  15. SU: Osmosis • If you placed a cell in a hypertonic solution, would the cell shrivel or expand? Explain your answer • If you placed a cell in a hypotonic solution, would the cell shrivel or expand? Explain your answer • Refer to 7-3 if you forgot what hypertonic and hypotonic means.

  16. Use the following scale: EZ – Easy, NP SHEEZ – Sheesh, I can do it. GEEZ – Gee, I don’t quite understand it but I think can do it. PLZEE – Please help! OMG WTH ROFL, I have no idea what that is?#$!! Cell Theory Eukaryotic Prokaryotic Plant Cell Animal Cell Organelles Osmosis Diffusion SU:Rate the following topics in respect to how well you could teach it to someone.

  17. Below are slides not used in class but may be of some help to you

  18. READ and Create Questions • Write your own 3 “short answer” questions • The more detailed or specific the better • Think of questions that might be on a test • Compare and Contrast • Synthesis (Create or Do something) • Write the answers to your questions • Each answer should be a paragraph in length. • 5-7 Sentences • A good answer has 2-3 parts to it.

  19. Section 7-1 review questions 1. What is the structure that makes up every living thing? 2. What was Anton van Leeuwenhoek the first to see in the 1600s? 3. What did a thin slice of cork seem like to Robert Hooke when he observed it through a microscope? 4. What did the German botanist Matthias Schleiden conclude? 5. What did the German scientist Theodor Schwann conclude? 6. How did Rudolph Virchow summarize his years of work? 7. What are the three concepts that make up the cell theory? 8. Circle the letter of each sentence that is true about prokaryotes. a. They grow and reproduce. b. Many are large, multi-cellular organisms. c. They are more complex than cells of eukaryotes. d. They have cell membranes and cytoplasm. 9. What is an organelle? 10. Are all eukaryotes large, multi-cellular organisms?

  20. Warm up 3/15/07 Division of Labor A cell is made up of many parts with different functions that work together. Similarly, the parts of a computer work together to carry out different functions. Answer the following questions. 1. What are some of the different parts of a computer? What are the functions of these computer parts? 2. How do the functions of these computer parts correspond to the functions of certain cell parts?

More Related