Transport Across The Plasma Membrane Intracellular Fluid (ICF) – The two thirds of your body fluid contained inside body cells. (Intra = within). The cytosol of the cell. Extracellular Fluid (ECF) – Fluid outside the body cells. (extra = outside). Interstitial Fluid – The ECF in tiny spaces between cells (inter = between). Plasma- the ECF in blood vessels. Lymph- The ECF in lymphatic vessels. Solute – Any material dissolved in fluid. Solvent- The fluid a Solute is dissolved in. Concentration
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Olfactory epithelium Specialized cells lining the olfactory recess 2. Olfactory bulbs (#1) Axons of olfactory neurons project through the cribriform plate (#1) to these structures Where the olfactory nerves synapse with mitral & tufted cells 3. Olfactory vesicles bulbous enlargements of the dendrites of olfactory neurons 4. Olfactory hairs Have chemoreceptors (#5) that bind to odorants‚ resulting in action potential production 5. Basal cells olfactory neurons lost from the olfactory epithelium
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Cell Membrane Permeability and Osmosis Experiment 3 Objectives: To demonstrate the mechanism involved in Osmosis; To demonstrate the tonicity of solutions by subjecting the cells to different concentration of solute. To view‚ under the microscope‚ any change in the shape and volume of the cells after subjecting them to different concentrations of solutes; To demonstrate the permeability of cell membrane by subjecting the cells to different solutes; To demonstrate the mechanism involved in
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are independent‚ rapid‚ and random in motion. These molecules frequently collide with each other and with the sides of the container. In a period of time‚ this movement results in a uniform distribution of the molecules throughout the system. This process is called diffusion (Everett and Everett‚ 2007). Diffusion occurs naturally‚ with the net movement of particles flowing from an area of high concentration to an area of low concentration. Net diffusion can be restated as the movement of particles
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Cells are some of the smallest organisms around. All living things consist of cells‚ and yet they are invisible to the naked eye. Cells are the basic structural and functional units of life. Cells are made up of many different parts which allow them to function properly. All cells are separated from their surrounding by a cell membrane. The cell membrane regulates what enters and leaves the cell and also aids in the protection and support of the cell. A cell membrane
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Cell Membrane Structure Phospholipids are arranged in to layers‚ called the bilayer. They only have 2 fatty acids‚ this is because the third fatty acid is replaced by a negatively charged phosphate group. The phosphate heads are polar‚ in other words attracted to water‚ therefore they are hydrophilic. The lipid tails are non-popular as they’re not attracted to water and therefore known as hydrophobic. When phospholipids are added to the water‚ they rearrange themselves so that the hydrophilic heads
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Osmosis and Active Transport Substances will move through the membrane by diffusion. This is the random spreading out of particles until they are even. For example‚ when you put your instant coffee in boiling water‚ the coffee particles spread out and fill the entire mug‚ this is diffusion. A second way that substances can move through the cell membrane is by osmosis. This is a special type of diffusion where water moves from a high to a low concentration through a ’partially permeable membrane’‚ or a
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Transport Systems Essay In single celled organisms‚ nutrients‚ water and various substances that are need for basic cellular processes can easily be transported in and out through the cell membrane. This is an effective transport system for microscopic organisms‚ but multicellular organisms require a more complex transport system to sustain itself. Take humans for example; unlike a cell‚ only the outer layer of skin is in contact with the body’s outside environment. It’s not possible for substances
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anything covered in lecture 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
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G. INZELT‚ Charge Transport in Conducting Polymer Film Electrodes‚ Chem. Biochem. Eng. Q. 21 (1) 1–14 (2007) 1 Charge Transport in Conducting Polymer Film Electrodes G. Inzelt Eötvös Loránd University‚ Institute of Chemistry‚ Budapest‚ Pázmány Péter sétány 1/A‚ H-1117‚ Hungary E-mail: inzeltgy@chem.elte.hu Review Received: August 4‚ 2006 Accepted: December 13‚ 2006 The essential features of charge transport in conducting polymer film electrodes are discussed. Selected experimental results
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