BIOLOGY REVIEW UNIT 1 BIOCHEMISTRY 1) Describe the structure of an atom and compare this to the structure of an ion. * Atoms have protons and neutrons in their nucleus making them electrically neutral 2) Complete the following table Element Name | Boron | Oxygen | Beryllium | Sodium | Symbol | B | O | Be | Na | Atomic # | 5 | 8 | 4 | 11 | # of Protons | 5 | 8 | 4 | 11 | # Neutrons | 6 | 8 | 5 | 12 | Total # electrons | 5 | 8 | 4 | 11 | #Electrons in 1st Shell | 2 |
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Bibliography: Corbis Coporation. (2009‚ September 22). Human Red Blood Cells in Physiological Isotonic Saline Solution (0.9% nacl) Sem x1000 by Dennis Kunkel Microscopy‚
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STUDY GUIDE FOR PRACTICAL #1 Spring 2015 Bio 115 (Biology I Lab) 1. Be able to identify the parts of the compound light microscope. Know the functions of those parts. 2. Understand how to focus a slide/specimen under the microscope. Be familiar with the steps taken to focus under low and high power. Be ready to define and calculate total magnification and know what happens to the field of view when the magnification is increased. 3. Understand how to measure the field diameter using a
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OSMOSIS LAB BACKGROUND INFORMATION. Dialysis tubing is being used to model a plasma membrane. Isotonic solutions are solutions that have the same concentration of solutes on both sides of the membrane. Hypertonic solutions are solutions that have more solute to the one with less solute. Hypotonic solution are solutions that have less solute to the one with more solute. RESEARCH QUESTION:which dialysis tubing will gain the distilled water and which one will loss its content
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suitable concentration. (a) Amoeba‚ living in freshwater‚ uses a contractile vacuole to expel the excess water from its cytoplasm (thus need more respiration/O2/ATP than isotonic (marine) Amoebae). (b) The kidneys maintain the blood (thus‚ whole body) at the correct concentration. Osmosis and Plant Cells (a) Plant Cells in a hypotonic (= weaker) solution – cells have lower water potential • the plant cells gain water by osmosis. • the vacuole and cytoplasm increase in volume. • the cell membrane
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Lesson 1 Key Questions 1. Mg2+ has 10 electrons 2. Given that the half life of the radioisotope carbon -14 is 5730 years‚ it would not be useful in dating bones that are over a million years old. After 40 000 years of age less than 1% of the 14C is left in the bone and thus it is not useful for determining the exact age beyond that. 3. Hydrolysis - A chemical reaction where a chemical is broken down by a reaction with water. Hydrolysis is important for the digestion of food‚ making
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| | Answers are attached Enjoy Biology‚ 8e (Campbell) Chapter 7 Membrane Structure and Function Multiple-Choice Questions 1) Who was/were the first to propose that cell membranes are phospholipid bilayers? A) H. Davson and J. Danielli B) I. Langmuir C) C. Overton D) S. Singer and G. Nicolson E) E. Gorter and F. Grendel 2) Who proposed that membranes are a phospholipid bilayer between two layers of hydrophilic proteins? A) H. Davson and J. Danielli B) I. Langmuir
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ANATOMY & PHYSIOLOGY I WORKSHEET I Plasma Membrane and Cellular Transport Structure of the Plasma Membrane 1. Why do you think it is important to have a membrane surrounding each of our trillions of cells? Expect varying answers‚ but the idea is have the students understand the plasma membrane separates the cells from their environment and each other while also regulating the material within each cell. 2. What are two distinctive physical features of phospholipids? Heads are polar (water soluble
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Osmosis – When water molecules move concentration to level out. Osmotic pressure – The pressure forced upon the membrane by a solution with a solute that cannot pass through. Isotonic Solution – A solution where the concentrations of solutes that cannot pass through the plasma membrane are the same on both sides. Hypotonic Solution – A solution that has a lower concentration of solutes than the cytosol inside red blood cells. Hemolysis – The
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proteins can do? 5. What do are the criteria a particle must have to simple diffuse through the lipid bilayer? 6. What’s the difference between facilitated diffusion and simple diffusion? 7. What’s osmosis? 8. What’s the meaning of hypertonic‚ hypotonic‚ isotonic? Give examples if a RBC (red blood cell) was place in each type of solutions. 9. What’s plasmolysis and turgor pressure? 10. Compare and contrast the active transport of the sodium and potassium pump and the sodium glucose co transport
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