Text Edition (10th/11th/12th) is specified if the figure numbers are DIFFERENT in the editions. If figure numbers are the SAME‚ then the edition is not specified. ****502 Students: Read this paragraph **** If you are a 502 student using this guide‚ this is based on Dr. Rust’s lectures in Physiol 201. Topics may have been covered in more detail in 502 or the coverage or emphasis may have been different since many topics in 502 were taught by other professors- so use your notes and slides along
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cleft is the space between the presynaptic and postsynaptic neuron. The arrival of an action potential normally causes the release of neurotransmitters from the presynaptic neuron. The action potential travels down to the axon terminal of the presynaptic neuron. Each axon terminal becomes swollen forming a presynaptic knob. There is a depolarisation of the presynaptic membrane resulting from the action potential. This depolarisation causes an increase in the permeability to sodium and calcium ions
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interact with the sodium ions inside the myelinated internodes and subsequently with the sodium ions in the next node of Ranvier‚ vastly speeding up the process of propagating the action potential5. This process can be modeled by a partial differential equation obtained from the Cable theorem and describes the potential across the myelin layer‚ found in Equation 1
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brain III. Nerve Impulse Conduction A. Resting Potential 1. positive charge outside a. high sodium ion concentration 1) sodium pump 2. negative charge inside a. phosphate & sulfate ions b. negatively charged proteins c. high potassium concentration 1) potassium pump 3. potential difference = -70 mV B. Potential changes 1. –70 mV to 0 = depolarization 2. higher than –70 mV = hyperpolarizing C. Action Potential occurs when Threshold Potential achieved 1. causes
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REVIEW SHEET EXERCISE 6 Cardiovascular Physiology NAME: LAB TIME/DATE: 1. Define each of the following terms: • autorhymicity- The heart is autorhythmic. This means it generates its own rhythmic action potential independent of the nervous system. • sinoatrial node- is the impulse-generating (pacemaker) tissue located in the right atrium of the heart‚ and thus the generator of normal sinus rhythm. • pacemaker cells- are specialized cells that cause involuntary muscles and tissues to
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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‚ or the voltage at which you first saw an action potential? 3.0 V 3. How does this tracing compare to the one that was generated at the threshold voltage? Very similar except that it’s peak is a little higher while it drops a little more as well. 4. What reason can you give for the change
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to let an organism gain information about what is going on inside/outside body and how to respond to it. Three functions of the nervous system: • receive information; input • integrate information with past experiences; processing • Guide actions; output. Brain can adjust the impact of incoming information (can’t tickle oneself) Brain cells communicate by chemicals signals released by other cells. Made of separate cells Neurons: cells that are specialized to quickly respond to signals
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------------------------------------------------- ------------------------------------------------- WAVE PROPAGATION ------------------------------------------------- ------------------------------------------------- EE3071 Laboratory 3 Location: S1-B4a-03 AY 2011/2012 Name: EMIR NUROV Matriculation number: U0920108K Group: LA03 1. Introduction 1.1 Propagation in Free-Space 1.1.1 Friis Transmission Equation To begin the derivation of the Friis Equation
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0 Activity 1‚ the simulation showed you how the resting membrane potential depends on the concentration of K+ and Na+ in the ECF. Some data were generated while measuring the resting membrane potential using a microelectrode that was positions alternatively in the ECF and the ICF. You recorded the data in Chart 1 on page 35. Use the data to produce a Graph that will clearly show how the effects ion the resting membrane potential when the ECF concentration of K+ is high and when the ECF concentration
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receptor 2. All of the following are features of graded potentials except… a. decremental d. occur at dendrites b. sub-‐threshold e. can be inhibitory c. non-‐decremental Identify the following features of the action potential for a typical neuron. Be aware of the sequence of events.
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