Nerve & Muscle Important Solved SEQs By Medical Study Center Ref: Guyton Q.1. a). What is saltatory conduction? Enlist its advantages? 1+1 marks b). briefly mention the three determinants of resting membrane potential. 3 marks Ans: Q.1.a. SATTATORY CONDUCTION: 1 mark Propagation of action potential along a myelinated nerve fiber from one node of Ranvier to other in jumping manner is called as saltatory conduction. r Node to node conduction. Also called saltatory / jumping conduction. All ion channels
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Self-renewal and differentiation are fundamental stem cell fate decisions‚ which are essential for normal tissue development‚ homeostasis‚ and repair actin cytoskeleton and Rho-GTPases‚ mediate downstream signal transduction Serum response factor (SRF) and yes-associated protein (YAP) are two examples of mechano-sensitive transcription factors‚ which have recently been implicated in epidermal and mesenchymal stem cell differentiation Lab notes: Passive processes: transport driven by
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Chapter 8.1 1. List the four biological levels of organization in a human in order from most simple to most complex. Cells‚ tissues‚ organs‚ organ systems 2. Define the term “homeostasis”. The tendency of the body to maintain a relatively constant internal environment. 3. What does the term “feedback system” refer to with respect to homeostasis? A cycle of events in which a variable‚ such as body temperature‚ is continually monitored‚ assessed‚ and adjusted. 4. List the three components
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`ANP 1105 B – Human Anatomy and Physiology I Contents 1. Structural Organization of the Human Body (2 Lectures) 1.3.1 Tissues Tissue: groups of structurally similar cells that have perform common/related function Tissues cooperate within an organ for function of organ as a whole‚ different issues = division of labor 1.3.2 4 Types of Tissue: 1. Muscle Tissue: movement 2. Epithelial Tissue: covering 3. Nervous Tissue: control (regulation)
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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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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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to and/or from the CNS and visceral organs or structures of the body periphery (Marieb & Mitchell‚ 2009). In this experiment we will work with a nerve The action potential we will see on this experiment reflects the cumulative action potentials of all the neurons in the nerve‚ called a compound nerve action potential. Although an action potential follows the all-or none law within a single neuron‚ it does not necessarily follows the all-or-none law within an entire nerve. When you electrically stimulate
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Name:shasou Exercise 3: Neurophysiology of Nerve Impulses: Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Which of the following occurs after the peak of the action potential? Your answer : b. Voltage-gated K+ channels open. Correct answer: d. All of these occur. 2. What is meant by Na+ channel inactivation? Your answer : a. The Na+ channel opens when the membrane
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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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