BIOSC 048: Problem Set Questions 1. Given that cell A has significantly more nongated K+ channels than cell B‚ which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B‚ then the resting membrane potential (rmp) will be closer to the equilibrium potential in cell A‚ which means the rmp will be more negative in cell A than in cell B; or in other words‚ the potential difference will be LARGER in cell A. 2. Predict the effect of a reduced
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UMUC Biology 102/103 Lab 3: Cell Structure and Function INSTRUCTIONS: On your own and without assistance‚ complete this Lab 3 Answer Form electronically and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus). To conduct your laboratory exercises‚ use the Laboratory Manual that is available in the WebTycho classroom (Reserved Reading or provided by your instructor) or at the eScience Labs Student Portal. Laboratory exercises on your CD may not be
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Cell Membrane Transport ZOOL 2011.19 A. Introduction: Cells are the most significant building blocks of all living things. They are also the tiniest living organisms in the human body which provides structure for the body and intake nutrients that become energy. Cell membranes control what goes in and out the cell‚ it protects it. The lipid bilayer describes the membrane of both animal and plant cells where the properties that make up phospholipids are very important
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water through a cell membrane. 4. Define Turgor pressure ( also known as osmotic pressure). The pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis‚ often used to express the concentration of the solution 5. What occurs when plasmolysis takes place? The cells shrink and shiver. 6. Define the terms endocytosis and exocytosis . * Endocytosis: the taking in of matter by a living cell by its membrane to form a vacuole
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Practical 2.1- The Effect of Temperature on Membranes Objective To investigate the effect of temperature on membrane structure Introduction Beetroot Pigments Beetroots contain Betalains which are the red pigments present in the cell vacuole. Betalains are soluble in water and they contain nitrogen. Betalains extracted from beetroot is commonly used as food dye because it is not known to cause any allergic reactions. Beetroot Picture taken from http://tipdeck/how-to-cook-beet-root Structure
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INTRODUCTION: This lab was done to know how diffusion takes place. In the first place‚ particular penetrability is characterize as the particular "determination" with reference to what particles to enter the cell or kept outside of the cell; it is basically specific of what is going in and what is going out‚ primarily supplements going in and squanders going out (Marieb). Moreover‚ specific penetrability happens in two ways: dynamic process that requires ATP for the transportation of cell while
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with many functional units or organelles (Spurger).A membrane is a fluid mosaic which consists of proteins‚ lipids and carbohydrates which seperates the cell from it’s surrounding environment or subdivides a cell into specialised regions or compartments (Watters). The membrane is specialised in that it contains the specific proteins and lipid components that it requires in order to fulfil the requirements needed by that organelle or cell. Membranes are vital for the integrity and function of a cell
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Amateur hobbyists are creating home-brew molecular-biology labs‚ but can they ferment a revolution? $195–$1‚000 $250–$2‚000 MICROCENTRIFUGE $60–$850 IMPROVISATION IS KEY To do molecular biology on the cheap‚ biohackers have developed some creative workarounds: • for a $10 microscope‚ pop the lens o a webcam and stick it back on backwards. • for an $80 centrifuge‚ order the DremelFuge rotor and attach to a Dremel rotary tool. • for a free 37 ºC incubator‚ incubate tubes of E. coli in
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Fred and Theresa Holtzclaw Chapter 7: Membrane Structure and Function Name_______________________Period___________ Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. 2. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely accepted. Describe
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Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. 4. Who proposed the fluid mosaic model of membrane structure
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