Lab 6 Biomechanics of Frog Skeletal Muscle I. Purpose This exercise is designed to demonstrate some mechanical and physiological properties of skeletal muscle using the gastrocnemius muscle of a frog. II. Performance Objectives At the end of this exercise the student should be able to: 1. Define minimal (threshold)‚ subminimal‚ maximal‚ and supramaximal stimulus. 2. Explain what is meant by a “graded” response. 3. Draw a diagram of the setup used in this lab exercise. 4. Calculate the
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Serratus Anterior 1. ABDUCTION of Shoulder Girdle Joint 2. UPWARD ROTATION of Shoulder Girdle Joint Pectoralis Minor 1. ABDUCTION of Shoulder Girdle Joint Pectoralis Major 1. FLEXION of Shoulder Joint 2. HORIZONTAL FLEXION of Shoulder Joint 3. MEDIAL (INTERNAL) ROTATION of Shoulder Joint Rhomboid Minor 1. ADDUCTION of Shoulder Girdle Joint 2. DOWNWARD ROTATION of Shoulder Girdle Joint Rhomboid Major 1. ADDUCTION of Shoulder Girdle Joint 2. DOWNWARD ROTATION of Shoulder Girdle
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Identify the muscles in the anterior compartment of the leg The leg is divided into three compartments by tough fasciae to hold the muscles and proper functioning of these muscles during their contraction. These compartments also contain nerves and vessels. The three main compartments are anterior (extensor)‚ lateral (fibular) and posterior (flexor). The anterior compartment (Extensor compartment) contains muscles which are used for extension (dorsiflexion) of the foot as these muscles have origin
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Experimental Gerontology 45 (2010) 81–90 Contents lists available at ScienceDirect Experimental Gerontology journal homepage: www.elsevier.com/locate/expgero Review Aging and the force–velocity relationship of muscles Isaac Selva Raj a‚*‚ Stephen R. Bird a‚ Anthony J. Shield b a b Royal Melbourne Institute of Technology‚ Australia School of Human Movement Studies‚ Faculty of Health‚ Queensland University of Technology‚ Kelvin Grove Campus‚ Victoria Park Road‚ Kelvin Grove‚ Queensland
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2/14/2012 Anatomy and Physiology Muscle Grip Strength Lab Report Introduction: Skeletal muscle is a form of striated muscle tissue existing under the voluntary control of the somatic nervous system (Medscape 1). Skeletal muscle is part of the three big muscle types‚ it is connected to bones by tendons (Medscape 1). Muscle grip strength is significant to an individual because it helps the person know the ability of muscle power and force that they have in their
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Activity 1 – The Muscle Twitch and Latent 1) Define the terms skeletal muscle fiber‚ motor unit‚ skeletal muscle twitch‚ electrical stimulus‚ and latent period. Skeletal Muscle Fiber: Skeletal muscle cells that are composed of hundreds to thousands of individual cells that produce muscle tension. These fibers are what move our bodies and generate muscle tension/force that enables us to have manual dexterity. Motor unit: consists of one motor neuron and all of the skeletal muscle fibers that it
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Name: lily Exercise 6: Cardiovascular Physiology: Activity 1: Investigating the Refractory Period of Cardiac Muscle Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 07/10/13 page 1 Experiment Results Predict Question: Predict Question 1: When you increase the frequency of the stimulation‚ what do you think will happen to the amplitude (height) of the ventricular systole wave? Your answer : a. The amplitude will increase. Predict Question 2: If you deliver multiple
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Experiment 2: Skeletal Muscle ABSTRACT Frog skeletal muscle is used as an animal model to study muscle contraction. The objectives of this experiment is to demonstrate the physiological responses of skeletal muscle to electrical stimuli using frog gastrocnemius‚ to understand twitch‚ summation‚ tetanus and fatigue‚ to investigate the relationship between initial tension and force of contraction‚ to explore the differences between human and frog skeletal muscle. The threshold voltage is 0.4V. The
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CA research 1How do muscles get the energy they need to work All muscles need ATP (ATP is a ‘energy currency’) most of these cell reactions rely on the breakdown of ATP the ways to get atp are to react anaerobically or aerobically. The “ reactions form energy in the format of ATP’’ ATP (also known as adenosine tri-phosphate) is produced. Respiration is conducted from the cell membranes inside the mitochondria. Aerobic respiration provides a lot of energy needed per molecule of glucose (the level
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MANY PROCESSES MUST TAKE place within the skeletal muscle fibres in order for muscle contraction to occur. The cross bridge cycle‚ process by which the muscle length is shortened as myosin heads‚ extending from the myosin filaments‚ interact cyclically in a rowing motion with the actin filament (Rayment et al. 1993)‚ is one of the crucial mechanical events required. The mechanism is initiated when an ATP molecule is bound to a myosin head. An enzyme within the head. known as ATPase‚ hydrolyzes the
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