Name: Jojo Cohen Date: 12-8-17 Cell Transportation Overview Directions: Read page 362-374 and use your notes to help you answer the following questions. 1. Illustrate and describe the structure of the cell membrane using figure 2.8 on page 362. 2. What does selectively permeable mean (pg. 363)? A: Selectively permeable means that some substances can pass through the cell membrane while others cannot pass through. 3. What is diffusion and why does it occur? A: The movement of solutes
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is osmosis. Osmosis is the diffusion of water across the cell membrane. Three examples of osmosis are hypertonic‚ hypotonic‚ and isotonic solutions. A hypertonic solution is a solution that has a higher concentration of dissolved particles than another solution. A hypotonic solution is a solution that has lower concentration of dissolved particles compare to another solution. Lastly an isotonic solution is a solution that has an equal concentration of dissolved particles compared to another solution
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solutes relative to one another ___B__ the movement of molecules across a selectively permeable membrane with the aid of specialized transport proteins a. diffusion b. facilitated diffusion c. osmosis d. active transport e. hypotonic f. isotonic g. hypertonic 2. What is the main difference between simple diffusion and facilitated diffusion? FACILITATED IS MOVEMENT WITH THE HELP OF CARRIER PROTEINS 3. What is the main difference between facilitated diffusion and active transport
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faster‚ concentration occurs because the higher the concentration of the sucrose the faster the rate of osmosis occurs. In the experiment there are 3 other reactions that are present are hypertonic‚ hypotonic and isotonic. Hypertonic is when the cell loses water‚ hypotonic is when the cell gains water and isotonic is when the cell does not gain or lose water. I predict that each cell will become heavier and heavier after each weigh in every 10 minutes. The experiment that my lab partners and I did
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sheep blood in an isotonic solution Slide#3 1. Place 1 drop of 10% NaCl solution onto the slide
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Nucleus- The nucleus is the control center of the cell. This is where DNA is contained. This is like the town hall or the mayor’s office because it is the control center of a town. The nucleus uses DNA like a city uses blueprints to direct the production of protein. Nucleolus- The nucleolus is where ribosome is made and is rich in RNA content. It is located inside the nucleus. A mayor is like this because the mayor makes everything in the town happen. He also works from the town hall‚ or works
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creating ion channels). Osmosis provides the primary means by which water is transported into and out of cells. The turgor pressure of a cell is largely maintained by osmosis‚ across the cell membrane‚ between the cell interior and its relatively hypotonic environment.[8] Jean-Antoine Nollet first documented observation of osmosis in 1748.[9] The word "osmosis" descends from the words "endosmose" and "exosmose"‚ which were coined by
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Review for Bio 103 Lab Midterm Read the lab manual and study your worksheets. Vocabulary: Metric system‚ percent error‚ systematic error‚ random error‚ accuracy‚ precision Cylinder‚ beaker‚ pippette‚ balance‚ meniscus Field of view‚ inversion‚ total magnification‚ depth of field‚ par focal Microscope parts: eye piece‚ body tube‚ arm‚ nosepiece‚ objectives‚ stage clips‚ mechanical stage‚ diaphragm‚ condenser‚ fine and course adjustments‚ light stage‚ base Protein‚ peptide bond‚ simple sugar
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abundant lipid in a cell membrane a. phospholipids b. steroid c. cholesterol d. chitin B. 4. When the fluid outside a cell has a greater concentration of a given molecule than the fluid inside the cell‚ the external fluid is a. isotonic b. hypertonic c. hypotonic d. ultratonic A. 5. The special structures that carry materials across the cell membrane are a. proteins b. fatty acids c. phosphates d. phospholipids D. 6. Which of the following processes makes direct use of oxygen? a. glycolysis
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Part 1 Questions 1) What sort of environment (hypotonic‚ hypertonic‚ isotonic) did the extra fertilizer create around the roots of the corn? The extra fertilizer created hypertonic environment. 2) Keeping in mind your answer to the previous question‚ what do you believe caused the corn plants to wilt and eventually die? - I believe that the extra fertilizer having a higher concentration than the first round of fertilizer was not a good environment for the corn to try and survive in. 3)
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