Skeletal Muscle Physiology Activity 1 1. Skeletal muscle fiber- long‚ cylindrical cell with multiple oval nuclei arranged just beneath the sarcolemma Motor unit- all of the muscle cells controlled by a single motor neuron Skeletal muscle twitch- a single stimulus-contraction-relaxation cycle in a skeletal muscle Electrical stimulus- uses an electrical current to cause a single muscle or a group of muscles to contract Latent period- the time between the stimulation of a muscle and the start
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REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE: Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. b. c. 2. In Activity 2‚ how long was the latent period? __________ msec Describe the chemical changes that are occurring during this period. The Graded Muscle Response to Increased Stimulus Intensity 3. From Activity 3‚ describe the effect of increasing
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SHEET NAME_____________________ LAB 6: Skeletal Muscle Physiology Electrical Stimulation 1. Complete the following statements by filling in your answers on the appropriate lines below. A motor unit consists of a (a) and all the (b) it innervates. Whole muscle contraction is a(n) (c) response. In order for muscles to work in a practical sense‚ (d) is the method used to produce a slow‚ steady increase in muscle force. When we see the slightest evidence of force
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Discuss the relationship between distribution of muscle fibre type and performance. How might exercise training modify or change a person’s fibre-type distribution? There are four different types of muscle fibres: type 1‚ type 2a‚ type 2x‚ and type 2c. “A single skeletal muscle contains fibres having different speeds of shortening and ability to generate maximal force: type 1 (slow-twitch) fibres and type 2 (fast-twitch) fibres. Type 1 fies take approximately 110 ms to reach peak tension when
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Patton and Thibodeau: Anatomy & Physiology‚ 7th Edition Chapter 15: Sense Organs Answers to Quick Check Questions 1. Mechanoreceptors‚ chemoreceptors‚ thermoreceptors‚ nociceptors‚ photoreceptors‚ and osmoreceptors. 2. The general sense organs consist of microscopic receptors widely distributed throughout the body in the skin‚ mucosa‚ connective tissues‚ muscle tendons‚ joints‚ and viscera. The special senses are characterized by receptors grouped closely together or located in specialized
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Amanda Fallon Professor Jed Wolfson Anatomy and Physiology 1 October 27‚ 2011 Rhabdomyolysis: Disease of Muscular Breakdown Rhabdomyolysis is the breakdown of damaged muscle tissues resulting in the release of muscle fiber contents into the bloodstream (Patel M.D.). This disease occurs when there is damage to the skeletal muscle. The breakdown products of damaged muscle cells‚ such as myoglobin‚ are harmful to the kidneys and frequently result in kidney damage or even kidney failure
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The two main processes involved in muscle contraction are cross-bridge cycling and the length-tension relationship‚ which normally function to maximize contraction in the muscle. Beginning with the activation of a motor unit‚ the ions flow from the motor unit towards the muscle fibers that it innervates by the motor neuron in the same way as a normal muscle would. However since the tissue is damaged‚ the force that is generated by these muscle fibers will not be as great‚ leaving the fibers less
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EXERCISE 2: Skeletal Muscle Physiology Student Name: Student ID#: Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise2_JohnSmith.doc. Please make sure that your answers are typed in RED. (You may delete these instructions
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Advance Preparation—ATP Muscle Kit 1. Order the ATP muscle kits (Carolina) to be delivered no more than seven days before the lab. One kit provides generously for eight students. Extra vials of the chemical solutions can be ordered separately (Carolina) and will reduce waiting time. Just before the lab begins‚ cut the muscle bundles into 2-centimeter lengths and place in a petri dish in the accompanying glycerol. 64 Exercise 11 R E V I E W S H E E T NAME ____________________________________
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able to fully understand The Integumentary System. Materials: Marieb‚ Elaine. Hoehn‚ Katja. Human Anatomy & Physiology. Pearson. 2013. Print Methods: The skin‚ appendages of the skin‚ and disease of the skin. Results: BSC 2085C – Anatomy & Physiology I Lab 5: The Integumentary System Name __Sara Mulvaney__ Directions: There are five (5) activities in this lab. Please be sure to complete them all. For all questions‚ type your answers into the yellow box ____ (including your name above) it will
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