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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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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conditions on membrane permeability. 4.2 Learning Objectives In this Lab Session‚ students will acquire the skills to: - analyze the effect of different temperatures on membrane integrity. - analyze the effect of the organic solvent acetone on membrane integrity. 4.3 Introduction Even though membranes separate cells from their surrounding environment and different organelles within the cells from the cytoplasm‚ there is a constant flow of selected molecules through them allowing
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Title: Membrane Permeability Objectives: 1. Define solvent‚ solute‚ solution‚ selectively permeable‚ diffusion‚ osmosis‚ concentration gradient‚ equilibrium‚ turgid‚ plasmolyzed‚ plasmolysis‚ turgor pressure‚ tonicity‚ hypertonic‚ isotonic‚ hypotonic; 2. Describe the effects of hypertonic‚ isotonic‚ and hypotonic solutions on Elodea leaf cells and onion scale leafs. Introduction: Membrane permeability is a quality of a cell’s plasma membrane that allows substances to pass in and out of the
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The Paper Route In the following essay I am going to make a characterization of the narrator. Furthermore I will comment on the main themes and finally analyze the mood and setting‚ which I think has resemblance. The main character lives in‚ what he calls‚ a prairie town‚ which indicates that it is a small town‚ placed far away from the big city. In the first paragraph we get the impression that the main character doesn’t like to be the one person‚ except one girl‚ who doesn’t talk to anyone
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The Cell membrane surrounds all living cells and is the most important organelle‚ there is also a similar plasma membrane that surrounds all the organelles except for the ribosome. The membrane controls how and what substances can move in and out of the cell/organelle The structure of the membrane is often referred to as the “Fluid Mosaic Model”; this is because of the way it is structured It is composed of phospholipids‚ proteins‚ and carbohydrates‚ which are arranged in a fluid
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author of “Enhancing Your Body Image‚” feels that individuals in society either approve or disapprove the way their body is structured. Donatelle explains various ways on how society looks at their bodies. In another article‚ “Skin Deep: Seeking Surgery Through Self-Esteem‚” by Camille Sweeney‚ agrees that in today’s society‚ individuals are determined to get the ideal body image‚ but she also disagrees that in Donatelle’s article‚ parents should embrace how their children’s body is structuring. Sweeney
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take place” (Lynch & Duval‚ 2011). This theory better known as "Locard’s Exchange Principle” is the foundation of the forensic study of trace evidence as we know it today. Trace evidence is very important in forensic investigations as this evidence includes different types of microscopic materials as well as some materials that are easily visible to the naked eye. Trace evidence examination is the analysis of small particles in order to assist in establishing a link between a suspect and the victim of
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White-nose syndrome haunts bats The mysterious disease is obliterating bat colonies as it spreads across North America‚ and scientists say time is running out to save them. 7 Related Topics: Conservation‚ Endangered Species‚ Viruses & Diseases‚ Wild Animals Bats are flying ambassadors of Halloween‚ adding spooky ambience to countless forests‚ caves‚ graveyards and haunted houses. Lately‚ however‚ the tables have turned on them — Halloween and the winter it foreshadows are now an increasingly
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great job on your assignment for this week explaining the properties of the cell membrane with the correct terms integral proteins‚ channel proteins and bilipid construction. Your last paragraph was very detailed with great information about the cell membrane‚ you stated “ The cell membrane is very thin and fragile‚ and it contains two different types of proteins. “Integral proteins are part of the membrane structure and cannot be removed without damaging or destroying the membrane. Peripheral proteins
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