The Ionic mechanism and propagation of action potentials. The action potential is the result of a large‚ sudden increase in sodium permeability of the membrane. The resulting rush of sodium ions into the membrane and accumulation of positive charge on its inner surface drives the potential towards Ena. This is followed by repolarisation‚ whereby there is a large increase in the membranes permeability to potassium ions‚ hence the membrane returns to Ek. Explanation of the (ionic) mechanisms underlying
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carry sensory information to the brain‚ and descending tracts carry motor commands to the neurons in the spinal cord that control the muscles * Vertebrate brain divided into three parts * Hindbrain - most ancient part and regulates motor activity below the level of consciousness * Midbrain - optic lobes are part of the midbrain and was a center for coordinating reflexes involving the eyes and ears * Forebrain - originally dealt mainly with smell. Later‚ the thalamus evolved
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3.08 Marine Science TYPE OF EROSION CONTROL PROS OF USING THIS CONTROL CONS OF USING THIS CONTROL Jetties - Designed to coastal properties. -“The increased wave energy and the sediment trapped behind the seawall often decrease the sediment supply near the seawall‚ causing erosion on adjacent beaches. Therefore‚ alternatives to these hard structures are strongly encouraged and actively sought by the NPS.” Breakwaters -“Dunes not directly disturbed‚ increases area of dry upper beach‚ may allow new
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ions into the cell‚ for every 3 sodium ions it pumps out. As well as this‚ there are protein channels which allow potassium ions in the cell to flow out via facilitated diffusion. Potassium diffuses out the cell much more readily than sodium diffuses in. Lastly there are many negatively charged organic anions such as some amino acids inside the cell. These three factors give rise the the difference in charge between the inside and the outside of
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1. a. The action potential changes the membrane potential from -70 mV (resting) to +30 mV and back again to the resting membrane potential. b. This results from a change in membrane permeability first to Na then to K due to the opening of what type of ion channels? Voltage gated channels 2. a. Where is the density of voltage-gated Na+ channels the greatest? Axon hillock b. What areas of the neuron generate signals that open these voltage-gated channels? Dendrites and the cell body c. Opening
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The Principles Establish high-level corporate leadership for gender equality Treat all women and men fairly at work - respect and support human rights and nondiscrimination Ensure the health‚ safety and well-being of all women and men workers Promote education‚ training and professional development for women Implement enterprise development‚ supply chain and marketing practices that empower women Promote equality through community initiatives and advocacy Measure and publicly report on progress
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3.04-Free from Fear: Has the idea of "freedom from fear" changed over time? From "The Four Freedoms" by Franklin D Roosevelt in 1941 to the Welcoming Remarks President Obama gave Prime Minister Cameron of the United Kingdom which took place in present day‚ the "freedom from fear" is still the same. President Obama has the same belief as Roosevelt that everyone everywhere should be able to live free from fear and not have to live in fear. In "The Four Freedoms" Roosevelt talks a world-wide "freedom
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Coffee Ville Job Description Template Job title: Café Manager Work Location: Melbourne Salary/ Hours: ＄24.5 / H 38 H/ Week Reports to: Emma Full-time Part-time Exempt Nonexempt Reporting relationships: About Coffee Ville: Coffee Ville is a café shop placed in Melbourne‚ which serves quality food and fair trade coffee‚ it is opened 7 AM~ 5 PM‚ Monday to Starday. Purpose of position: could be an individual with a qualification that is relevant to operating/managing a small business Responsibilities
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Unit 9: Values and Planning in Social Care Task 3 You must produce fact sheets relating to two of the individuals in the case studies which consider how you can plan to support them. Within these fact sheets you must: Identify the processes and assessment tools involved in planning support for individuals with different needs who use social services (P2) Describe how three key professionals could be involved in planning support for individuals (M2) within the case studies Assess potential issues
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BTEC National Certificate/Subsidiary Diploma in IT Portfolio Evidence for Unit 9 – Computer Networks (2010) You MUST provide coursework for ALL of the ‘P’ tasks or you will not pass this piece of work. To gain a Merit you must‚ satisfactorily‚ complete all of the ‘P’ and ‘M’ tasks and gain a Distinction you must‚ satisfactorily‚ complete all of the ‘P’‚ ‘M’ and ‘D’ tasks. The assessment grid attached to this piece of coursework will help you. Section 1: Networks P1/P2/M1 You are working as an
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