Lab #3: Isotonic contraction and the effect of load on skeletal muscles Abstract The job of the motor nervous system is to control certain elements in muscles simultaneously to ultimately produce movement. Movement of the body is the result of specialized cells directly associated with skeletal muscle. Skeletal muscles are voluntary muscle and must contract before movement can occur. We know the muscle team moving the arm is formed at the biceps and triceps. Biceps can bend the elbow‚ but
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Skeletal Muscle Physiology: Frogs & Human Subjects (1‚ 2‚ 5-8‚ 10-12‚ 14-16) 1. There is a greatr concentration of Na+ f ; there is a greater concentration of K+ e . When the stimulus is delivered‚ the ermeability of the membrane at that point is changed; and c ‚ initiating the depolarization of the membrane. Almost as soon as the depolarization wave has begun‚ a repolarization wave follows it across the membrane. This occurs as b . Repolarization restores the h of the resting cell membrane
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PAGET’S DISEASE Paget’s disease or osteitis deformans (now corrected as osteodystrophia deformans) is normally a benign chronic disorder of the bone that results in various complications like bone deformities‚ pathological fractures and osteoarthritis (Ralston 2008). It is estimated to occur in about 2-3% of the U.S population of adults over 60 years of age and is the second most common disease after osteoporosis. The occurrence of this disease has been characterized by a significant increase in
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The Human Skeletal System Introduction The human skeletal system is comprised of both fused and individual bones; supported and supplemented by ligaments‚ tendons‚ muscles and cartilage. The skeletons purpose is to protect and support the delicate internal organs and provide a framework that allows the body to stand upright and move. It also produces blood cells and stores minerals that our body needs to function effectively. The skeletal system is a very important part of the human body. Without
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Osteoporosis is a bone disease in which the bones become very brittle and weak. Even a little cough could fracture your bone. Causes: when you’re in your younger ages you constantly make new bone how much you store when you reach your peak can determine whether or not you develop osteoporosis. Risk factors of this disease are: • Your Sex‚ in which women are most likely to get it than men. • Your age‚ as you get older your body stops making “new bone”‚ so you will have a greater chance in getting
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Treatment for Neurodegenerative Diseases The McGovern Institute claims‚ “Brain disorders are among the most serious health problems facing modern society” (“Neurodegenerative Diseases and Brain Injury”). The term neurodegenerative refers to the progressive breakdown of nerve cells (Mandal). Due to the aging population‚ the demand for a definitive cure is on the rise. To date‚ a cure for this condition has not been discovered. However‚ research has revealed preventative measures that decrease a
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Infectious Diseases: Disease Transmission Symptoms Treatment Common Cold Colds are considered a viral infection‚ meaning they are caused by a virus. Colds are considered a viral infection‚ meaning they are caused by a virus. The only means of recovery is rest and drinking a lot of fluids. Taking cold medications will only help relieve the symptoms. Hepatitis‚ Viral Hepatitis can either be acute or chronic. That means‚ it can either be a temporary illness‚ or it can be a permanent condition
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REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE:9pm.. 4.8.11 Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. Latent-stage from rest to muscle tension begins b. Contraction-At this stage the muscle reaches its peak in contraction c. Relaxation- muscle is shortened‚ returns to zero and back initial length. 2. In Activity 2‚ how long was the latent period? ___2
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What causes viral diseases? Viral infections occur when a virus enters the body and invades the inside of the body’s cells in order to reproduce. If the body’s immune system is unable to fight off the virus‚ it multiplies and spreads to other cells‚ repeating the process and leading to a widespread infection. Signs & Symptoms of rabies One of the most distinctive signs of a rabies infection is a tingling or twitching sensation around the area of the animal bite. In people‚ symptoms of rabies include
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The Disease of Me This was written by Alan Stein and modified by Renee Roggow …Many kids today don’t understand that volleyball is a we game – not a me game. They play for the scorebook‚ not the scoreboard. They play for the name on the back of their jersey instead of the name on the front. ‘ There are 3 symptoms of the ‘disease of me’ – each of which severely stagnates a player’s growth and development. I have seen each of these symptoms from players of every age and every level: 1.
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