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CELL MEMBRANE PowerPoint Presentation

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Description : COMPOSITION, CHARACTERISTICS/ PROPERTIES and FUNCTIONS OF THE CELL MEMBRANE

Tags : FUNCTIONS, MEMBRANE PROTEINS, CELL

Published on : Jan 23, 2021 | Views : 2034 | Downloads : 2

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Slide 1-

CELL
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COMPOSITION, CHARACTERISTICS/PROPERTIES & FUNCTIONS OF THE CELL MEMBRANE
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Protein 55% Phospholipids 25% Cholesterol 13% Other lipids 4% Carbohydrates 3%
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FUNCTIONS OF THE MEMBRANE PROTEINS
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DIFFERENTIATE:
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ION CHANNELS & CARRIER PROTEINS
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ION CHANNELS are found in all cells, and are especially important for the function of excitable cells (eg. neurons and muscle cells). Ion channels are classified by their selectivity, conductance and mechanism of channel gating. CARRIER PROTEINS bind with molecules or ions that are to be transported, and conformational changes in the protein molecules then move the substances through the interstices of the protein to the other side of the membrane.
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Guyton and Hall Textbook Medical Physiology 13th Edition.
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CARRIER AND CHANNEL PROTEINS
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ACTIVE TRANSPORT & PASSIVE TRANSPORT
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ACTIVE AND PASSIVE TRANSPORT
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TYPES OF PASSIVE TRANSPORT
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SIMPLE DIFFUSION Movement of small, nonpolar substances from an area of high concentration to an area of low concentration across a selectively permeable membrane without the assistance of carrier or channels.
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Movement of large, charged, and polar molecules down their concentration gradient; assisted across a selectively permeable membrane by a transport protein FACILITATED DIFFUSION
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OSMOSIS Movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. T
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FILTRATION Movement of molecules from an area of high pressure to an area of low pressure.
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TYPES OF ACTIVE TRANSPORT
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CARRIER-MEDIATED
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UNIPORT
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ANTIPORT
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CO-TRANSPORT
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COUNTER TRANSPORT
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VESICULAR MEDIATED TRANSPORT
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ENDOCYTOSIS
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EXOCYTOSIS
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TRANSCYTOSIS
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THANK YOU!