You are a Gemini As a typical Gemini you talk a lot and you are never where you were five minutes ago. No one can tie the Twins down with a heavy cord and expect this sylph of the air to remain patiently waiting until the cord is tugged. More likely‚ you’ll perform a Houdini-like trick and vanish before their eyes‚ leaving them with the cord. You are unpredictable‚ changeable as quicksilver‚ loving disguise and mimicry‚ fascinated for a little while with just about everything‚ quick to become
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Muscle Tissue Introduction * Motion * Results from alternating contraction (shortening) and relaxation of muscles * Skeletal system * Provides leverage and a supportive framework for this movement * Myology – study of muscles Muscle Tissue * Alternating contraction and relaxation of cells * Chemical energy changed into mechanical energy Types of Muscle Tissue * Skeletal muscle – primarily attached to bones * Striated and voluntary * Cardiac
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Lab 3 – Skeletal Muscle Physiology Introduction Skeletal muscles are composed of hundreds to thousands of individual cells‚ each doing their share of work in the production of force. As their name suggests‚ skeletal muscles move the skeleton. Skeletal muscles are remarkable machines; while allowing us the manual dexterity to create magnificent works of art‚ they are also capable of generating the brute force needed to lift a 100-lb. sack of concrete. When a skeletal muscle from an experimental
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E 2 Skeletal Muscle Physiology O B J E C T I V E S 1. To define these terms used in describing muscle physiology: multiple motor unit summation‚ maximal stimulus‚ treppe‚ wave summation‚ and tetanus. 2. To identify two ways that the mode of stimulation can affect muscle force production. 3. To plot a graph relating stimulus strength and twitch force to illustrate graded muscle response. 4. To explain how slow‚ smooth‚ sustained contraction is possible in a skeletal muscle. 5. To graphically
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isolated frog muscle could be made to contract when the sciatic nerve was irritated with a metal object‚ conducted the first muscle experiments between 1661 and 1665. Later‚ between 1737-1798 Luigi Galvani determined that frog muscle responded to electrical currents. The kymograph‚ which was invented in the late 1840’s lead to the revolution of experimental physiology because it enabled muscle contractions to be analyzed and recorded. The muscle cell or fiber is the basic unit of a muscle. The frog gastrocnemius
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points; 2.5 points each). Bubble your answers on your scantron. 1. A motor unit refers to a. a single muscle fiber plus all of the motor neurons that innervate it b. all of the motor neurons supplying a single muscle c. *a single motor neuron plus all the muscle fibers it innervates d. a pair of antagonistic muscles e. all of the muscles that affect the movement of any given joint 2. Which of the following is NOT associated with the thin filaments in skeletal muscle: a. tropomyosin
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Question 1 For each of the following independent situations‚ compute net accounts receivable. a. Accounts Receivable has a balance of $14‚000. The Allowance for Uncollectible Accounts has a credit balance prior to adjustment of $300. An aging schedule prepared on December 31 reveals $1‚100 of uncollectible accounts. b. Accounts Receivable has a balance of $25‚700. The Allowance for Uncollectible Accounts has a debit balance prior to adjustment of $400. An aging schedule
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lab reports by providing this information in an editable file which can be sent to an instructor. Exercise 1: Muscle Twitch Study the data for the three muscles in Tables 1A‚ 1B‚ and 1C. 1. Make a scatter plot graph in Microsoft Excel® using Data Tables 1A‚ 1B‚ and 1C that show the twitch tension timelines of the eye‚ rectus femoris‚ and plantaris muscle fibers. For each muscle‚ connect the dots together in sequence. Refer to the section in the Introduction of this lab manual titled: “Computer
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Skeletal Muscle Lab Introduction: Motor neurons and muscle fibers are the building blocks of motor units and where they intersect is called the neuromuscular junciton. The region where the flattened end of a motor neuron transmits neural impulses to a muscle is the motor end-plate. The end plate potentials depolarizes skeletal muscle fibers caused by neurotransmitters binding to the postsynaptic membrane in the neuromuscular junction. The process of contraction of the muscle cell is called excitation-contraction
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Muscle fatigue is weakness or weariness resulting from exertion or prolonged stress and the failure to maintain an expected power output. (Amussen) The process by which your body produces energy is called glycolysis. During glycolysis‚ glycogen is broken to produce creatine phosphate‚ which releases energy. The energy released catalyzes a reaction to produce ATP. The ending product of glycolysis is lactic acid‚ which is created by breaking pyruvate acid down. Then lactic acid is broken down to produce
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