excitability‚ conductivity‚ and contractility) enable the conduction system to start an electrical impulse‚ send it through the cardiac tissue‚ and stimulate the myocardial tissue to contract. • The autonomic nervous system plays an important role in the rate of impulse formation‚ the speed of conduction‚ and the strength of cardiac contraction. Electrocardiogram Monitoring • The electrocardiogram (ECG) is a graphic tracing of the electrical impulses produced in the heart. • ECG waveforms are produced
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Topic 2 Explain why comparing the G.D.P. of various nations might not tell you which nation is better off. Use information from the World Bank website to support your answers. In your explanation refer to the limitations of using G.D.P. as a measure of economic welfare and where possible‚ refer to the countries in your table above. Due to the very complex methods used in estimating gross domestic product and the sheer enormity of the task‚ gross domestic product is very necessarily a less than
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follows: Red: Sodium ion channels and sodium ions Blue: Potassium ion channels and potassium ions Page 1. Introduction • Neurons communicate over long distances by generating and sending an electrical signal called a nerve impulse‚ or action potential. Page 2. Goals • To understand that rapid changes in permeability of the neuronal membrane produce the action potential. • To recognize
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main intracellular anions Back phophates protein anions Front these gates are found on the dendrites and cell body of neurons Back ligand gates mechanical gates Front this conduction type is faster and more energy efficient and involves myelinated neurons Back saltatory Front this is the name for a bundle of axons in the PNS Back nerve Page 5
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3. Why don’t the terms depolarization and action potential mean the same thing? The terms depolarization and action potential differ because are excitable cells that communicate by transmitting electrical impulses that are capable of producing rapid electrical signals and depolarization in the interior surface of the membrane which becomes less negative and the exterior surface becomes less positive. Additionally‚ when depolarization reaches a certain threshold‚ an action potential is initiated
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Question: Explain how human activities can interrupt or modify the nutrient cycles in the coniferous forest. Refer in detail to examples you have studied. Attempt to show as annotated diagrams the altered minerals nutrient cycle. Essay: The coniferous forest occurs in cold climates to the poleward side of 60 N in Eurasia and North America as well as high attitudes in more temperate latitudes and in Southern Chile. It has an average NPP of 800g/m/yr. There is usually only one layer of vegetation
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Exercise 3: Neurophysiology of Nerve Impulses Worksheet Assignment Due: Week 4 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? Just a flat line. 2. What was the threshold voltage
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Review Sheet Exercise 3 Neurophysiology of Nerve Impulses Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? They require different things. Action potential requires depolarization and repolarization. Depolarization doesn’t require anything. 2. What was the threshold voltage in Activity 1? 3.0V 3. What was the effect of increasing the voltage? How does this change correlate to changes in the nerve? The action potential
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Exercise 3: Neurophysiology of Nerve Impulses Worksheet Assignment Due: Week 4 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Please make sure that your answers are typed in RED. Please type your Name and Student ID Number here: Charles Coon 4048223 Eliciting a Nerve Impulse Activity 1: Electrical Stimulation
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Activities 1-4‚ 8 By Laurence Blake 2/27/12 A. Objective I. Activity 1-4: Eliciting a Nerve Impulse • Investigate what kinds of stimuli stimulate action potential. II. Activity 8: Nerve Conduction Velocity • Determine and compare the conduction velocities of different types of nerves. B. Introduction I. Activity 1-4: Eliciting a Nerve Impulse • In this experiment‚ we will be investigating what stimulates action potential on the nerve being tested on the
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