Q1 Muscle contraction can be understood as the consequence of a process of transmission of action potentials from one neuron to another. A chemical called acetylcholine is the neurotransmitter released from the presynaptic neuron. As the postsynaptic cells on the muscle cell membrane receive the acetylcholine‚ the channels for the cations sodium and potassium are opened. These cations produce a net depolarization of the cell membrane and this electrical signal travels along the muscle fibers. Through
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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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Muscle fatigue is weakness or weariness resulting from exertion or prolonged stress and the failure to maintain an expected power output. (Amussen) The process by which your body produces energy is called glycolysis. During glycolysis‚ glycogen is broken to produce creatine phosphate‚ which releases energy. The energy released catalyzes a reaction to produce ATP. The ending product of glycolysis is lactic acid‚ which is created by breaking pyruvate acid down. Then lactic acid is broken down to produce
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from that occurs gives rise to voltage of waveforms. With the human body each cell at this present time is generating electrical impulses like a voltage generator‚ which is a basic source of all the bioelectric potentials. With these bioelectric potentials they produce ionic voltages produced by the coordination of electrochemical activity within numerous cells. When the cells are in line the charges tend to migrate through the body fluids towards the still unexcited cell area. As the charge migrates
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Bone Cancer Bone cancer is when there is an abnormal growth in the amount of tissue in a bone. These strange growths can be either benign or malignant‚ but usually malignant. There are two types of bone cancer; primary and secondary. In primary bone cancer‚ the cancer had actually started in the cells of the bone‚ whilst in secondary‚ the cancer has started in a different area and traveled through the body to the bone. The three main types of bone cancer are osteosarcomas‚ Ewing’s sarcomas‚ and
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Muscle building is a subject that interests many‚ but it is common for people to be somewhat confused as to how they should go about sculpting the body they desire. By arming yourself with the right information‚ you can soon be well on your way to the impressive physique you have always wanted. The article that follows can help you do just that. You should keep track of your progress. Weigh yourself regularly or measure your arms for instance. This will help you find out if you are working out
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Dry Bones SET 1: The body found behind the old cathedral in Spain is an adult male. That is because a body with a sub pubic angle of less than 90 degrees is a male. This person is an adult because the sutures of his skull have completely fused. This person also had scoliosis because that is what having a lateral curvature to your upper thoracic vertebrae indicates along with having a very small scapular spine on the left side and a very large scapular spine on the right side. The large hole in
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unthinkable nightmare‚ dismembered bodies of their loved and dear ones. Mr. Harvey reminded me of Ted Bundy‚ they both share similar physical characteristics and they have the same fixation. Ted and Mr. Harvey‚ the antagonist in the novel The Lovely Bones murdered their victims by strangling them‚ robbing them of their final breaths and making them struggle. George Harvey‚ a 36-year-old neighbor who
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Growth of Bones By: Asmaa Mohamed Bahaa ID: 2012189 Report on Bones’ Growth‚ Page 1 Assignment 1 BONE TISSUE ! Tissue Components Bone tissue is a type of connective tissue that contains lots of calcium and phosphorous salts. About 25% of bone tissue is water‚ another 25% is made up of protein fibers like collagen. The other 50% of bone tissue is a mixture of mineral salts‚ primarily calcium and phosphorous. ! ! Bone Anatomy Bone Forms Bones in the body are found
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factors affect muscle fatigue? Introduction: In this experiment muscles will be tested with weight‚ to see if weight is truly a factor in muscle fatigue. Muscle fatigue is the muscle’s ability to contract exert its normal strength due to physical stress upon it. The structure of a muscle include a thin layer called epimysium which surrounds the entire muscle‚ deeper to the epimysium is the perimysium. This layer contains fascicles which are bundles of muscle cells. In between the muscle cells are endomysium
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