twitch force to illustrate graded muscle response. 4. To explain how slow‚ smooth‚ sustained contraction is possible in a skeletal muscle. 5. To graphically understand the relationships between passive‚ active‚ and total forces. 6. To identify the conditions under which muscle contraction is isometric or isotonic. 7. To describe in terms of length and force the transitions between isometric and isotonic conditions during a single muscle twitch. 8. To describe the effects of resistance and starting
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physioex 9.0 Purpose Does the duration of the latent period change with different stimulus voltage? What is the role of acetylcholine in a skeletal muscle contraction? Hypothesis I predict that the latent period will not change if the stimulant is increased or decreased. Materials Human Anatomy &Physiology Marieb/Hoehn PhysioEx™ Lab: Skeletal Muscle Physiology Results/Ananlysis EXERCISE 2 Skeletal Muscle Physiology Name Valerie Jordan_ Lab Time/Date ___ Activity
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Introduction: In this lab‚ I will study how muscles contract‚ what makes muscles contract‚ different types of muscle contraction‚ and learn about how resistance affects muscle contraction. I will define Key Terms that describe what will occur in the experiments; I will conduct an experiment for each Activity and provide all resulting Data as well as answer Questions from each Activity. I will then provide a short Summary for what I learned in each Activity. Key Terms: Recruitment (or Multiple
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Histology Review Supplement The slides in this section are designed to provide a basic histology review related to topics introduced in the PhysioEx lab simulations and in your anatomy and physiology textbook. From the PhysioEx main menu‚ select Histology Tutorial. The opening screen should appear after a few seconds. The Sort by menu is located at the top left. Click on the white drop-down menu and select “Histology Review” from the list. You will note that the slides in the histology module are
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Dynamic contraction Dynamic contraction refers to a contraction where movement is involved. An example is lifting of a dumbbell from either side to the shoulder. Static contraction‚ on the other hand‚ refers to a contraction where no movement is involved. Concentric and Eccentric A concentric contraction is a way of using the body’s muscles for physical tasks. A concentricmuscle contraction is a very common kind of muscle contraction. It is part of many basic physical exercises and everyday
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response (EC50) occurred at a bath concentration of 2.74 x 10-8 M. The Hill coefficient of this curve was 1.237‚ indicating positive cooperativity. A representation of the isotonic contractions of the ileum can be seen in Appendix‚ Figures 1 and 2. Figure 2 illustrates the response of the Guinea Pig ileum through isotonic contractions when a dose of ACh is added into the organ bath with a competitive antagonist. A relationship between response and bath concentration can be identified through the clear
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stimulus‚ maximal stimulus‚ multiple motor unit summation‚ wave summation and tetanus and the graded contraction. • Develop and test hypotheses related to muscle contraction. • Practice graphing data from an experiment. • Practice interpreting a graph and drawing conclusions from data. Directions - Getting Started • This exercise uses the PhysioEx disc in the back of your lab manual or available online through Mastering A&P. • Obtain a laptop
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exercise is to understand how muscle twitch‚ contract and react to different activities. Exercise 1: Muscle Twitch A. What is a muscle twitch? A muscle twitch is the fasciculation ‚ or "muscle twitch"‚ is a small‚ local‚ involuntary muscle contraction and relaxation visible under the skin. B. According to the graphs‚ which muscle has the fastest twitch? Why? The lateral rectus eye muscle has the fastest twitch. It has the shortest latent period‚ or the shortest period of time between the
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of muscle contraction. (understand what occurs at each event) -Know the difference between repolarization vs depolarization -Know the Three ways to generate ATP in skeletal muscle fiber: phosphagen system‚ anaerobic cellular respiration‚ aerobic cellular respiration -Understand oxygen debt -Know the difference between slow and fast twitch fibers -Know the difference between Oxidative fibers & Glycolytic fibers -Know the difference in Isometric contraction and Isotonic contraction -Know the
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1) THE MUSCULAR SYSTEM 3.1 INTRODUCTION OF MUSCULAR SYSTEM. Muscles tissue do is done by the coordinated contraction and release of millions of sarcomeres‚ tiny structures within the muscles cells. Muscle activity accounts for the most of the body’s energy consumption. All muscles tissues is strong. Most is enduring‚ some of it astoundingly so. Its cells are crowded with mitochondria‚ thousands of little factories constantly turning out molecules of ATP‚ a refined fuel. There are three types of
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