Lecture: Plasma Membrane and Transport I. Structure of the Plasma Membrane A. plasma membrane - the surface encapsulating a cell B. Fluid Mosaic Model 1. bilayer of phospholipids a. hydrophilic heads - P04 end "water" "loving" attracted to water on inner/outer parts of cell b. hydrophobic tails - fatty acids "water" "fearing" attracted to each other on inside of bilayer c
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IC02 Causes and spread of infection The difference between bacteria‚ viruses‚ fungi and parasites are: Viruses are coated genetic material that invade cells and use the cell’s apparatus for reproduction. Bacteria are single celled organisms. Some classify them as a separate (fourth) kingdom on the tree of life. Fungi are multi-celled organisms that form a third Kingdom of life‚ along with the plant kingdom and the animal kingdom. Parasites are plants or animals that derive benefit
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pass infections around and then take them home and pass them to siblings and parents. This is a cycle that is difficult to break. Children also don’t always practice good hygiene and that makes them both susceptible to as well as good transmitters of disease. Many human infections are caused by either bacteria or viruses. Immunisation is available to prevent many important bacterial diseases. Viruses pose a considerable challenge to the body’s immune system because they hide inside cells. This
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Causes and spread of Infection 1. Understand the causes of Infection 1.1 Identify the differences between bacteria‚ viruses‚ fungi and parasites More accurately‚ parasites are actual animals‚ along with mites‚ and mites are so small you have some thousands living in your eyebrows. Bacteria are one cell things with a cell wall. Virae (viruses) are code only--they are the core requirement that bacteria have‚ but without all the other protective layers like cell wall and energy production. Instead
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Cellulitis is a bacterial infection that affects the skin and the tissue underneath the skin. Although cellulitis can be caused by many types of bacteria‚ streptococcus and staphylococcus are the main bacteria that cause this condition. Cellulitis often develops near surgical wounds or ulcers. This condition causes the skin to become reddened and swollen. It also causes the area to feel tender and hot. Cellulitis can quickly spread to other areas of the body. It is not contagious. Cellulitis can
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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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Chain of Infection As described above‚ the traditional epidemiologic triad model holds that infectious diseases result from the interaction of agent‚ host‚ and environment. More specifically‚ transmission occurs when the agent leaves its reservoir or host through a portal of exit‚ is conveyed by some mode of transmission‚ and enters through an appropriate portal of entry to infect a susceptible host. This sequence is sometimes called the chain of infection. Figure 1.19 Chain of Infection Image
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Section 1: Infections in Healthcare Settings Essay. Nosocomial infections‚ hospital acquired infections‚ are an on-going concern to healthcare professionals. These infections are one of the major causes of death in hospitalised patients and are a significant burden on not only the patient’s and the public’s health (as organisms causing nosocomial infections can be transmitted to the community through discharged patients‚ staff and visitors) but also the economy. A nosocomial infection is an infection
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CU254 Causes and Spread of Infection 1.1Identify the differences between bacteria‚ viruses‚ fungi and parasites. Bacteria – bacteria are extremely small singular organisms which are found almost everywhere. Viruses – it is a coated genetic material that invades cells and use’s the cells apparatus for reproduction. Fungi – it is a multi-celled living organism Parasites – they are types of living plants and animals that derive benefit from the metabolism of other animals and plants. 1.2 Identify
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1. understand the causes of infection 1.1 bacteria - neither plant/animal. are a group of there own. very small‚ normally millions of them. multiply ++. single cell with NO nucleus Virus - small infectious agent‚ can only replicate inside living cells of organism‚ have genes of DNA or RNA Fungi - multicellular micro organisms including yeasts & moulds. used for making ABx. essential in decomposition Parasite- is an organism that lives on or in another organism to the detremenet of the host
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