201: Human Anatomy and Physiology I Muscle Physiology Protocol I. Goals for this lab A. To increase your understanding of muscle physiology - tonus‚ motor unit recruitment and fatigue. B. Learn how to conduct and analyze an EMG (electromyogram) C. To gain more experience with the scientific method‚ experimental design‚ making predictions‚ critical analysis of results‚ and interpretation of your results. II. Introduction Human skeletal muscle consists of hundreds of individual cylindrically
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Muscle contractions tend to be smooth and vary in strengths‚ depending on the demands placed on them. The variations of strength are called graded muscle responses. There are two ways a muscle contraction can be graded‚ either by changing the frequency of stimulation or by changing the strength of the stimulation. When a muscle is responding to a change in stimulus frequency‚ the nervous system will reach a greater muscular force when increasing the firing of motor neurons. This causes a wave or
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MECHANICAL PROPERTIES OF SKELETAL MUSCLE USING FROG GASTROCNEMIUS AIM The purpose of this experiment was to demonstrate the physiological as well as mechanical properties of skeletal muscle using the gastrocnemius muscle of a frog by exploring five different investigations namely the single twitch‚ the graded response‚ the relationship between muscle length and tension‚ muscle tetanus‚ and muscle fatigue. These individual experiments aim to explore the way muscles can contract when an electrical stimulus
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Shayne Laidler Barnes What would happen if marijuana were legalized tomorrow? As the New Year comes so do new laws‚ especially those that have to do with medical and recreational use of marijuana in the United States. As our social and political landscapes are rapidly changing more and more states are passing pro-medicinal marijuana legislation. Currently there are 17 states that approved of pro-marijuana ballot initiatives‚ but not all of them have officially approved cannabis for medical use
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well‚ proteins‚ minerals and vitamins make up the bone. Bones have several parts‚ but are manily made out of calcium deposits. It takes around 20 years for our bones to completely harden. The building of bones happens throughtout our lives. We are born with about 300 soft bones. During childhood and adolescence‚ the cartilage grows and is slowly replaced by hard bone. Some of these bones later fuse together‚ so that the adult skeleton has 206 bones. Bones are composed of two types of tissue.
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The Stages of development according to Dr. Montessori and an explanation of what happens during each “re-birth”. Dr. Montessori defined 4 stages of development. She identified that within these stages of development it is intense at the beginning‚ consolidates and then tapers to the next stage. She talks about the re-birth of a child and describes it like passing through a kind of metamorphosis. The 1st and 3rd stages are periods of intense creation‚ while the 2nd and 4th stages are the calm periods
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Biochemistry of Muscle Contraction Fred P. Guillergan M.D.‚ FPCP Outline histology and biochemistry of muscles (Striated & smooth) – Myosin – Actin‚ Tropomyosin‚ Troponin – Accessory proteins of muscles Biochemical events in muscle contraction Calcium‚ Ca2+-binding proteins and Ca2+ channels in muscle contraction Biochemistry of Cardiac & Smooth muscle contraction Energetics of muscle contraction ☻Able to understand the normal anatomy and physiology of different types of muscles ☻ Provide
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1. Discuss the relationship between distribution of muscle fiber type and performance. How might exercise training modify or change a person’s fiber-type distribution? Skeletal muscles contain multiple fiber types that are distinguished by their different myosin ATPase speed‚ and the development of their SR. The two main fiber types are type I and type II fibers. Type II fibers have a faster ATPase and a more developed SR than type I fibers. Type II fibers are also part of a larger motor unit‚
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those who play the sport‚ especially those who participate in it professionally. Now‚ what we aimed to find out in our experiment‚ is whether or not the amount of air inputted into a soccer ball would affect the ball’s travel distance. Along with that‚ we hoped to learn which amount of air would deliver the furthest distance. And potentially with this knowledge‚ those who play the sport‚ will know to what amount they should fill their ball to‚ in order to gain the best performance‚ distance wise.
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Identifying the Latent Period 1. How long is the latent period? 2.78 msec 2. Does the latent period change with different stimulus voltages? no Activity 2: Identifying the Threshold Voltage 1. What do you see in the Active Force display? Leveled line 2. What is the threshold voltage? .8 V 3. How does the graph generated at the threshold voltage differ from the graphs generated at voltages below the threshold? They were Level Activity 3: Effect of Increases
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