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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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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Affirmative Action is it still Valuable COM/220 June 4‚ 2013 Affirmative action‚ what is it? Affirmative action is an active effort to improve the employment or educational opportunities of members of minority groups and women. (Affirmative action. (2013). In Merriam Webster. Retrieved from http://m-w.com) Affirmative action is very important in our modern society‚ Affirmative action is the most effective way of addressing discrimination against minorities and women. Affirmative
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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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see if ether will have an effect on eliciting an action potential which I believe that it will make it difficult. Curare is a well known plant extract that South American Indians used to paralyze their pray. It blocks synaptic transmission by preventing the flow of neural impulses from neuron to neuron (Laboratory Manual). I believe that the effect of curare eliciting an action potential will lead to curare not being able to act on an action potential because it will block and slow down the stimulation
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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 and the polarity
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relaxation) 3. effects of increasing stim. Intensity on muscle force: forces increases then stays constant 1. Nervous Sys. I: Action Potential; Ion Channels; Membrane Potential 2. Nervoous Sys. II: Synaptic Potentials and Cellular Integration‚; Synaptic Transmission 3. Endocrine Sys.: Biochemistry‚ Secretion and Transport of Hormones; Actions of Hormones 4. Muscular Sys.: Neuromuscular Junction; Muscle Metabolism 5. CV Sys.: Cardiac Cycle; Measuring Blood Pressure; Cardiac Output
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Unit: Coordination and Control The human body is made up of many cells which form and create different tissues and organs within the body. Control and coordination are required to enable all functions within the body to work accordingly and appropriately at the specific times required. The system
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1. Compound action potentials can be graded responses. True 2. The sciatic nerve contains axons of both afferent and efferent neurones. True 3. The absolute refractory period of an action potential is the period after an initial stimulus when it is impossible to evoke another action potential with a second stimulus. True 4. The refractory periods of individual axons are important as they dictate the maximal action potential firing rate of a neuron. True 5. Compound action potentials represent the
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telodendria. terminals. mitochondria. neurosomes. vesicles. vesicles Most CNS neurons lack centrioles. This observation explains the ability of neurons to produce a resting potential. the ability of neurons to communicate with each other. why CNS neurons grow such long axons. the ability of neurons to generate an action potential. why CNS neurons cannot divide to regenerate damaged tissue. why CNS neurons cannot divide to
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