1) The types of muscles that are affected by Duchene Muscular Dystrophy are skeletal and cardiac muscles. 2) The protein that composes the Thick filament are called myosin. The proteins that compose the thin filament are called actin. The myofilment that troponin is associated with is actin. 3) The role of calcium in muscle contraction is to bond with the troponin, which allows the tropmyosin to move its potion that is blocking the active sites on actin filaments so cross bridges can attach. The
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Muscle contractions are the reason why the skeleton can be moved. The muscle contraction starts off with a nerve impulse that is sent from the brain or spinal cord to the skeletal muscle to cause a contraction. This nerve impulse is also known as an action potential. The site where the motor neuron connects with the muscle fiber is called the neuromuscular junction. At the sarcolemma, the neuromuscular junction is a chemical synapse that consists of the axon terminals and motor end plate. The action
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The practice of yoga connects us to the muscular-skeletal system in a dynamic and fundamental manner. The muscular-skeletal system is comprised bones, cartilage, muscle, fascia, tendons, ligaments, and scar tissue. These connective tissues are key components to our flexibility, and connect to the other systems of our body in major and minor ways. Muscle includes both the central fleshy part and its surrounding tendons. The central/belly part of the muscle is composed of individual muscle fibers
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TAQ 2 1 A voluntary muscle named the quadriceps has a structure that is divided into four separate portions. These include, the rectus femoris occupying the middle of the thigh and covering most of the other three quadriceps muscles, originating on the illium. The remaining three portions lay deep to rectus femoris and originate from the body of the femur that cover from thetrochanters to the condyles. Vastus lateralis is on the lateral side of the femur (outer side of the thigh). Vastus medialis
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The muscular system derives of smooth muscles, skeletal muscles, and cardiac muscle. Smooth muscles are those that surround hollow organs while skeletal muscles attach the skeleton to form the flesh of the body and cardiac muscle is found only in the heart. Just like any other body system, there can be affective problems. Neuromuscular junction disorders impair the transmission of nerve signals to muscles. Myasthenia Gravis is the most common neuromuscular junction disorder. The discovery of Myasthenia
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A&P Regrades 4. a)This is correct because the basement membrane is where a cell attaches to a “lining”, so the basement membrane will always be outside the normal cell membrane as it is not a part of the actual enterocyte or keratinocyte cell. 7. b)This is correct because the working muscle gets hot and the blood that is being pumped into the muscles are cooler than the muscles themselves, so blood flow into the working skeletal muscle will cool the muscle back down. 8. b)This is incorrect because
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limbs and slight speech impediment, she could be suffering from a neuro-muscular disease. There are several neuromuscular diseases such as: Huntington’s disease, Parkinson’s disease or Lou Gehrig’s Disease. To start off, since the patient experiences weakness in the limbs, she could be suffering from a type of muscular dystrophy (MD). There are many kinds of MDs, all of which cause weakness by the degeneration of muscular tissue in the body. Looking at the patient’s age and that she feels weakness
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Activity 1: Muscle Twitch and the Latent Period Muscles have different functions in our body. They maintain body temperature by contracting, and they use the energy stored in the body, which later is transformed into heat. For muscles to contract, they must be stimulated by motor neurons; these motor neurons meats at the neuromuscular junction. When the nerve impulses reach the neuromuscular junctions voltage –regulated calcium channels open and allow calcium to enter the axon; the ca2+ inside cause’s
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Myasthenia Gravis Diagnosis Myasthenia gravis is a chronic disease characterized by progressive weakness and fatigue of the voluntary muscles. It is caused by an abnormal breakdown in communication between your muscles and nerves. Although it can affect people of any age, it is commonly seen in females below the age of 40 and in males above the age of 60. While there is no cure, treatment for myasthenia gravis helps relieve its signs and symptoms. A myasthenia gravis diagnosis can be made after your
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Reyes, Charles Jourdan F. January 14, 2013 V BS Biology Bi183.1 Section A Exercise 1: Baseline Data Results Figure 1. Force (N), ECG (mV) and heart rate (bpm) of the pithed frog. Figure 2. Force (N) per unit time (s) of the pithed frog. Figure 3. ECG (mV) per unit time (s) of the pithed frog. Table 1. Time between QRS and the start of ventricular contraction(s). 1. Observe the heart and describe its behavior. Is this behavior consistent
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