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 oscillator. The factors that helped determine action potential are voltage‚ single stimulus‚ Hydrochloric acid‚ sodium
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basis of their structure and function. 12-3 Describe the locations and functions of the various types of neuroglia. 12-4 Explain how the resting potential is created and maintained. 12-5 Describe the events involved in the generation and propagation of an action potential. 12-6 Discuss the factors that affect the speed with which action potentials are propagated. 12-7 Describe the structure of a synapse‚ and explain the mechanism involved in synaptic activity. 12-8 Describe the major types
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Activity: Action Potentials Name: Barbara Uthe Instructor: Catherine Rice Date: 08.17.2014 Predictions Exceeding threshold depolarization at the trigger zone______the likelihood of generation of an action potential. increases Action potential amplitude increases with distance Increasing frequency of stimulation to the trigger zone decreases number of action potentials Materials and Methods Experiment 1: Effect of Stimulus Strength on Action Potential Generation Dependent
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What is an Affirmative Action Program? It is a law‚ program or activity that changes the conditions for any race with a disadvantage in society. Affirmative action strives for diversity in many sectors of the work world‚ education and society. What is the issue? Discrimination is intentional or unintentional bullying to a person of different race‚ sex‚ religion‚ etc... that causes hurt or harm to the individual. The fact that somebody speaks differently or is a different colour does not come
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ACTIVITY 1: The Resting Membrane Potential Answers 1. The nervous system contains two general types of cells: neuroglia cells and a. nerves. b. cell bodies. c. neurons. d. nephrons. 2. The resting membrane potential of the neuron in this lab under the control conditions was _______ mV. 3. True or False: For most neurons‚ the concentration of Na+ and K+ ions inside and outside the cell are the primary factors that determine the resting membrane potential. 4. Explain why increasing the
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Contribution of Nav1.8 Sodium Channels to Action Potential Electrogenesis in DRG Neurons J Neurophysiol 86:629-640‚ 2001. ; You might find this additional info useful... This article cites 38 articles‚ 24 of which you can access for free at: http://jn.physiology.org/content/86/2/629.full#ref-list-1 This article has been cited by 68 other HighWire-hosted articles: http://jn.physiology.org/content/86/2/629#cited-by Updated information and services including high resolution figures‚ can be found at:
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ACTIVITY 1: THE RESTING MEMBRANE POTENTIAL 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out the neuron through the K+ leak channels? When the diffusion is greater on one side‚ the other side will slow down. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare with your predictions? There are two potassium’s for every sodium so the increase of potassium will make it more
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“A Civil Action” by Jonathan Harr What is the difference between a criminal and a civil case? Criminal cases require that a verdict be made without a “shadow of doubt‚” but in civil cases that is not the case. Professor Nesson in “A Civil Action” states that civil cases only need around 51 percent to determine liability. This book was a very interesting read because it takes us through the different parts of a civil trial and how the case even got started. It is especially important to consider
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screen with 1.0 volts? No a flat line was observed 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0 volts 3. How do the tracings generated with higher voltages compare to the one that was generated at the threshold voltage? The tracings traveled in the same fashion but had a higher peak of the action potential as you increased the threshold voltage 4. What reason can you give for the change? The increase in voltage creates the nerve to
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Signals Traveling in Neurons Two opposing ideas about the nervous system * Reticular theory ( the nervous system consisted of a large network of fused nerve cells) * Neuron theory ( the nervous system consisted of distinct elements or cells * Discovery of staining led to the acceptance of neuron theory. Staining is a chemical technique that caused nerve cells to become colored so they stood out from surrounding tissue * A way of electricity is transmitted in groups of neurons‚ such
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