Membrane Transport Christopher Gaita‚ Deija Williams‚ Elisabeth Johnston & Megan Lade University of Phoenix (Online Campus) Amy Sullivan Introduction: Membrane Transport • What is membrane transport • Types – – – – Diffusion Osmosis Active Transport Endocytosis/Exocytosis Photo Courtesy Of: http://hyperphysics.phy-astr.gsu.edu/hbase/biology/celmem.html Osmosis • Example: A semipermeable membrane bag containing a 30% sugar solution is placed in a beaker of pure water. – Diffusion or osmosis
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may appear on the exam. Membrane Transport 1. Describe the cell permeability and membrane transport. What can enter/exit the cell on its own? What requires assistance? Why? 2. Describe membrane potential. What is it? How is it established? How does it influence the transport of charged molecules? What are the components of the electrochemical gradient? 3. What are the different types of membrane transport? Describe each in detail. Which move solutes with their electrochemical
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For Learning Centre use only Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Review Sheet Results 1. 2. Describe two Variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: A. The size of the molecule. The larger molecule will diffuse more slowly than the smaller molecule. B. The nature of plasma membrane. If the membrane is composed of lipid portion.‚ only lipid soluble molecules can pass through while water molecules
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Electron Transport Chain The first step in the electron transport chain process is for the NADH2 produced during glycolysis‚ the intermediate step‚ and the citric acid cycle to be attracted to Complex I (FMN ·FeS)due to its high affinity for NADH2. This attraction pulls NADH2 to Complex I (NAD dehydrogenase) and the two electrons from H2 are pulled off by the FeS (ferrous sulfate) leaving two H+ ions and NAD+. These molecules repel each other and this results in the NAD+ being recycled
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12. Briefly discuss the role of the electron transport chain in cellular respiration. In your explanation‚ discuss and identify key molecules involved in this process and explain their relationship which each other in terms of how they contribute to the main cellular purpose of this process. Electron transport chain plays a key role of in the production of oxygen in cellular respiration. ETC uses many enzymes located on the inner mitochondrial membrane during the production of oxygen. The source
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Cell Transport Mechanisms and Permeability 1 EXERCISE 1 OBJECTIVES 1. To define the following terms: differential permeability‚ passive and active processes of transport‚ diffusion (simple diffusion‚ facilitated dif- fusion‚ and osmosis)‚ solute pump‚ pinocytosis‚ and phagocytosis. 2. To describe the processes that account for the movement of sub- stances across the plasma membrane‚ and to indicate the driving force for each. 3. To determine which way substances will move passively
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1. AADF= 1000 n=20 years r= 3.0% Open in 2020 Cummulative traffic=AADF×365×1+rn-1r =1000×365×1+0.0320-10.03 =9.808 million commercial vehicles AADF=1000 Midterm year of 20 years start of 2020=2030 Vehicle Damage Factor (VDF) VDF=0.350.93t-0.260.92t+0.0821.03.9F1550 Base year-1992 F= AADF=1000 Value of t; t=2020+202-1992 t=38 years VDF=0.350.9338+0.082-0.260.9238+0.0821.03.910001550 VDF=2.4065-2.0960.4156 VDF=2.4065-0.8712 VDF=1.54 Design traffic=VDF×cummulative traffic =1
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Summary Transport Economics Inhoud Inhoud 1 Chapter 3 3 3.1 definitions 3 3.2 determinants of demand 3 3.3 Peak problem in road transport 4 3.4 elasticity of demand 5 3.5 Market price 6 3.6 market welfare 6 3.7 9/11 and the effects on the market 7 3.8 The problem of rural demand 7 Chapter 4 7 4.1 Definitions 7 4.2 Classification of costs according to their nature 7 4.3 Classification of costs according to their scale 8 4.4 Other types of cost important in TEM 9 4.5 Classification
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Pex7p Transport Role As previously stated‚ the location of the mutation causing the lethal RCDP1 phenotype has been narrowed down to the 10-exon PEX7 gene. wt PEX7 is translated as a cytosolic import receptor Pex7p‚ responsible for binding enzymes destined for the peroxisomal matrix marked by the N-terminal peroxisome-targeting signal 2 (PTS2). In a normal cell‚ the Pex7p receptor has a PTS2 receptor region that recognizes and binds the PTS2 of the localized protein in the cytosol‚ necessary for
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people. If they have their own cars‚ they can drive anytime and anywhere. What’s more‚ it’s tough for elderly people to use public transportation. They have to go up and down the stairs when they use public transportation. There are many stations which don’t have elevators or escalators in Japan. In my opinion‚ I can’t live without public train because I can get to the office in time. At any rate‚ public transportation is essential for our daily life.yhybybybybybyhyhynynynynununynynynybrvrctvtbtbtbtvrctvtrvrff-
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