In this lab‚ we are measuring the EMG amp (mV)‚ or electrical activity‚ from action potentials produced from muscle contractions in order to gain an indication of the number of active motor units used in the contraction. This is done by adding more load to the muscle or force. There is examining of the EMG amp produced from a twitch at varying levels of muscle force and EMG amp from muscles when more load is placed on them. During the experiment‚ we set up the equipment‚ electrodes and software
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------------------------ --GENERALIZED VERTEBRATE MUSCULATURE AS EXEMPLFIED BY THE DOGFISH The musculature of the dogfish is considered under the heads of somatic‚ fin‚ branchial and hypocranchial musculature. I.PARIETAL or SOMATIC MUSCLES The Parietal muscles which completely covers the whole body of dogfish consists of: 1. Myotomes - zigzag series which is separated from one another by: 2. Myosepta - white connective partitions 3. Lateral septum - white longitudinal line in the middle part
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Any athlete has surely experienced a muscle cramp before and can tell you the indescribable pain they emit. The main question is what is a muscle cramp and how is it caused. Someone who frequently undergoes muscle cramps may also wonder ‘how do I prevent these?’ Muscle cramps can be a nuisance and may stope athletes or everyday people from doing what they like. When a muscle or group of muscles involuntarily contracts this is called a muscle cramp. A muscle contracting causes it to get smaller
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Muscle Change in People Anatomy and Physiology Professor Debra Low Discussion Board Stephanie Quinn March11‚ 2013 Which lower extremity muscles are utilized during standing and walking? They are your Quadriceps they are the biggest muscles by far they are at the front of the thighs. They raise the thigh and leg. Then there are the Hamstrings these form the back of the thighs and move the leg backward. The Buttocks powerful and bulky complete the backward movement of the step. Stomach muscles
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HOW MUSCLES GET THE ENERGY THEY NEED TO WORK 1) Muscle needs energy to contract and as stated previously the ‘universal energy currency’ of living systems is ATP (adenosine triphosphate). This is largely produced within mitochondria‚ organelles which are often referred to as the ‘powerhouse’ of the cell. The ATP that results is used to provide the power for the muscle fibres to contract. Contraction itself (i.e. actual shortening movement) occurs when a bond is broken between ATP and one of its
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"seeing-doing" because your muscles seem to "know" and "remember" just what to do. What you’re learning now is speed‚ i.e. how to perform the task carefully and quickly. That’s muscle memory. Scientists call this "kinesthetic memory" or "neuro-muscular facilitation" and they speak of "sensory-motor" learning‚ since you are combining sensing input‚ i.e. what you see with your eyes‚ with motor output‚ i.e. what you do with your body. Of course‚ during the "drill-and-practice"‚ your muscles aren’t really memorizing
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The White Man’s Muscles In today’s society‚ the naked white male body is found everywhere. It can be seen in print ads‚ including clothing catalogues‚ TV commercials‚ and especially in movies‚ yet the prevalence of the naked white male body is something that has only been embraced since the 1980s. Prior to the 1980s‚ half naked white males were hardly ever seen in popular film because of the negative effects it would have on male self-esteem and masculinity. People in our generation
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Preventing Muscle Cramps Caused By Dehydration John Doe GEN/200 April 18‚ 2011 John Deere Preventing Muscle Cramps Caused By Dehydration Muscles cramps and spasms can be annoying. If the body is not taking in enough daily fluids it can cause major health issues in a short amount of time. Fluids as well as other contributing factors such as age‚ has a large influence on muscles. People can often suffer from muscle weakness and cramping from dehydration. Exercising can also reduce
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There are three phases for muscle cell contraction: initiation of action potential in the sarcolemma‚ excitation-contraction coupling‚ and contraction‚ sliding of the myofilaments. ATP and calcium ions are two essential elements for muscle contraction. When ATP attaches to the myosin head‚ it gets hydrolyzed to ADP and Pi. Calcium ions bind to the troponin molecules and help expose the binding sites of actin filaments to allow for the attachment of the myosin heads. After the sliding of the myofilaments
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simply a method of transmitting information from one place to another extremely fast. This is done by shooting pulses of light through an optical fibre. Creating the optical signal involving the use of a transmitter‚ relaying the signal along the fiber‚ ensuring that the signal does not become too distorted or weak‚ receiving the optical signal‚ and converting it into an electrical signal. An optic-fibre is a small fibre no thicker than a human hair‚ either made of glass or plastic that is transparent
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