Excitation Contraction Coupling Process The sequence of events that converts action potentials in a muscle fiber to a contraction is know as excitation contraction coupling. In order for a skeletal muscle fiber to contract‚ it has to get a signal from the nervous system. The part of the nervous system that it gets a signal from is called a motor neuron. An electoral signal‚ called an action potential travels down the axon and to the axon terminal. At the end of the motor neuron are structures
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Muscle Contraction & Excitation Muscle excitation takes place when there is a synaptic transmission and induction of an impulse. There are six steps that take place during muscle excitation. (1)The action potential travels down the somatic motor neuron axon reaching the synaptic bulb causing calcium ions to flow into the synaptic bulb. (2)The increase of calcium in the synaptic bulb causes the synaptic vesicles to undergo exocytosis. (Exocytosis a process that allows large molecule to leave
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Outline the differences between the excitation-contraction coupling mechanism between skeletal and cardiac muscles. Excitation-contraction coupling is the combination of the electrical and mechanical events in the muscle fibres and is related by the release of calcium from the sarcoplasmic reticulum. (Silverthorn‚ 2007) In the skeletal muscle‚ action potential in the nerves is generated when the somatic motor neurons releases the neurotransmitter acetylcholine (ACh)‚ at the neuromuscular junction
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Couplings are mechanical elements that ‘couples’ two drive elements which enables motion to be transferred from one element to another. The drive elements are normally shafts. We tend to see lot of applications of the couplings mainly in the automobiles‚ for example the drive shaft which connects the engine and the rear axle in a bus or any automobile is connected by means of a universal joint. In order to transmit torque between two shafts that either tend to lie in the same line or slightly misaligned
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Couplings A coupling is a mechanical device used to connect two rotating shafts for the purpose of transmitting torque from the driver to the driven piece of rotating equipment. There are two basic classes of industrial couplings: rigid and flexible. Rigid couplings are not designed to allow for any misalignment. Flexible couplings can compensate for some misalignment. Flexible couplings also allow for shaft end-float‚ or end-play‚ which is the inclination of shafts to move back and forth across
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end by tendons. As the muscles contract‚ they exert force on the bones. This force helps to support and move our body. Normally one end of the muscle is fixed in its position and the other end moves during contraction. The Origin is the attachment site that is stationary during contraction. The insertion is the site that does move when a muscle contracts. When we discuss the position of the Origin and insertion points‚ the insertion is usually distal‚ or further away. While the origin is proximal
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Describe the process consultation. Discuss when it should be used and how it applies to organization development. Process consultation (PC) is a general framework for carrying out helping relationships. It is oriented to helping managers‚ employees‚ and groups assess and improve processes‚ such as communication‚ interpersonal relations‚ decision making and task performance. Schein argues that effective consultants and managers should be good helpers‚ aiding others in getting things done and in achieving
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When one is writing‚ they use a method called the Writing process. Every individual has their own way of going about this process. The four distinct steps that are involved in this is prewriting‚ drafting‚ revising‚ and editing. Any good writer will follow these steps to make a successful paper. I was asked to pick a metaphor that would describe my type of writing. Through countless minutes of thought I saw one that I think fit perfectly. I chose “ Writing is like trying to smooth ripples from
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Homeostasis is the process within mammals where the body systems work together to maintain a stable response to a fluctuating environment within the body due to changes in the external environment and input into the body. The homeostasis process is used during blood sugar regulation within the body. This is the process whereby the body uses hormones to keeps the glucose levels in the blood at a stable level to ensure the body’s optimum function. Blood sugar levels are determined by the amount of
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To know why fracking pollutes the environment‚ everyone must first understand the fracking process and what is left behind as a result. The fracking process can be summed up in five steps: the first step is to drill a hole‚ the second step is to pump the hole with a pressurized mixture of water‚ sand‚ and chemicals‚ the third step is to take out the mixture out of the hole
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