Topic 2 – Cell membranes Reading Chapter 5 Objectives Functions of cell membranes The fluid mosaic model The lipid bilayer – phospholipids‚ glycolipids and sterols Properties of the lipid bilayer Membrane proteins – the ‘mosaic’ in the model Solute movements across membranes BIO 1140 – SLIDE 1 http://www.nikonsmallworld.com/gallery/year/2006/id/751 Functions of cell membranes – an overview Fluid mosaic model Singer & Nicolson 1972 Fluid lipid molecules in which
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Homeless Outline I. Introduction A. Attention Getter: Imagine all the events that occurred in your life today. You woke up from your warm bed‚ took a shower‚ got dressed‚ went to either school‚ work‚ or both. Then you came home‚ had dinner‚ and went to sleep. These are all basic needs‚ basic needs that many people in the United States today don ’t have. Most people would agree that a day like this is fairly ordinary. Shelter‚ clothes‚ food‚ education‚ and family are all things that we usually take
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Conclusion Comprehensive marine and coastal databases are essential for management of the seas of Southeast Asia. Maps of resources found in marine and coastal environments‚ the sources of potential damage and data to guide managers are the means by which resources can be assessed and managed to maintain marine resources. This information is get by do the oceanographic survey. There is a strong need for data for managers to manage‚ conserve‚ remediate‚ recover and sustain continued use of Southeast
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Ben Zaré 9MK Biology Investigation - Osmosis in Potato Cells 9/7/04 Section 1 Planning Aim What is the aim of your experiment? What do you want to find out? The aim of this experiment is to investigate how potato tissue changes when placed in sucrose solution of different concentrations. Therefore‚ I want to find out if and how osmosis differs‚ when the concentration is changed. Variables What is the variable you are going to change in the experiment?
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Cell Yell In this generation‚ people tend to speak their mind regardless of their surroundings. Thinking back to a few years ago‚ everything was private. Not too many people were broadcasting personal business in public settings. Nowadays when using public transportation services‚ it’s rather annoying to hear the next person’s conversation. What ever happen to keeping your conversation private? Privacy plays an important role in my life. Everything isn’t for everyone to hear‚ see‚ or understand
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Even thought there are plenty of food in the world for everyone‚ there are about 21‚000 people die every day of hunger-related causes‚ according to the United Nation. [1] The Hunger Games‚ as its name denotes‚ its about poverty‚ hunger and social inequalities. This film is set in the near future where there are 12 Districts and a Capitol that controls them. In this film‚ the main character Katniss lives in one of the district with her fatherless family. The district she lives in is in poverty and
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Background Information: Cell Transport When molecules move from a high to low concentration it is called moving DOWN the concentration gradient. When molecules move from a low to high concentration it is called moving AGAINST the concentration gradient. When the concentration of a solute is the same throughout a system‚ the system is at EQUILIBRIUM. What kind of transport DOES NOT require energy? PASSIVE What kind of transport requires energy? ACTIVE Which CELL PART provides the energy for
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Associate Program Material Cell Energy Worksheet Answer the following questions: Cellular respiration: What is cellular respiration and what are its three stages? Cellular respiration is the complete cycle of a glucose molecule that happens to be using oxygen. The three stages of cellular respiration are: Glycosis‚ the Krebs cycle‚ and the electron transport chain. What is the role of glycolysis? Include the reactants and the products. Where does it occur? Glycolysis is the
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the other animals‚ and instead of establishing an egalitarian society‚ they replaced the tyranny of man with an even worse form of oppression and exploitation. Orwell clearly shows that: “power corrupts‚ and absolute power corrupts absolutely”. Conclusion: Orwell set out to express his feelings and thoughts on the situation in Russia. By using the basis of a farm and the animals to take the place of people‚ he was able say more of what he really felt. Napoleon‚ the leader‚ pushing himself
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Cell Fractionation i) EQUIPMENT: Cold Liver‚ Blender‚ Gauze‚ Fridge‚ Isotonic Solution‚ Centrifuge‚ Tubes‚ Scalpel‚ HOMOGENIZATION • Take chilled liver tissue and cut into smaller pieces. • Place liver into blender with cold isotonic solution. • Blend until you have a thick soup like substance (homogenate). • Filter the mixture to remove large debris through gauze into a tube. DIFFERENTIAL CENTRIFUGATION • Attach tubes of homogenate to the refrigerated Centrifuge and turn on to spin
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