The two main processes involved in muscle contraction are cross-bridge cycling and the length-tension relationship‚ which normally function to maximize contraction in the muscle. Beginning with the activation of a motor unit‚ the ions flow from the motor unit towards the muscle fibers that it innervates by the motor neuron in the same way as a normal muscle would. However since the tissue is damaged‚ the force that is generated by these muscle fibers will not be as great‚ leaving the fibers less
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muscle has similarities with the skeletal muscles‚ because it is striated. Furthermore‚ it has slight similarities to the smooth muscles‚ because its contractions are not under conscious control. On the other hand this type of muscle is highly specialised. It is under the control of the autonomic nervous system‚ however‚ even without nervous imput contractions can occur due to cells called pacemaker cells. Cardiac muscle is highly resistant to fatigue due to the presence of a large number of mitochondria
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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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released until it strikes the ground. 4. The time it takes for the ball to hit the ground depends on v0 ‚ g and h. 004 10.0 points The velocity of a projectile at launch has a horizontal component vh and a vertical component vv . When the projectile is at the highest point of its trajectory‚ identify the vertical and the horizontal components of its velocity and the vertical component of its acceleration. Consider air resistance to be negligible. 4. It cannot be determined. 002 10.0 points
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Well when I become and singer and I create my own album I would have Beyoncé and Ashanti. Beyoncé would be singing de JA vu. I picked that song because I used to dance to that song all the time when I was younger. Then I pick Ashanti because I just love her voice she sings so good especially in the song called mother. I also pick aalya to be on my album if she was alive because all her life she made really good songs like try again that’s a good song I used to dance to. I also like Kelly Rowland
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from the origin. Position –Time Graph Graph increased with time and then become constant Velocity-Time Graph Graph increased and decreased with time and then become zero Acceleration –Time Graph Graph increased and decreased with time some time becomes positive and some tie negative then zero. 2. In red make a prediction for the distance-time‚ velocity-time and acceleration-time graphs for each situation. b. The man is sleeping under the tree. When
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under the number 09.04.418 and presented on www.eurovent-certification.com. Eurovent - Air handling units - Energy efficiency class A Section [m2] 1.1625 Velocity [m/s] 1.85 Type: With Recirculation 100[%] external winter design temperature °C -25 · GENERAL FEATURES Supply flowrate [m3/h] 7758 17.5 400 3 50 Not available [l/s] 2155 Face velocity [m/s] 2.51 2490 1370 1200 452.58 1 RH RH 8000 global 69 [dB(A)] 87.9 38 [dB(A)] 77.9 33 [dB(A)] 74.0 Feed Installed el. power [kW] : Tension [V] : Phase:
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09-1 Velocity Cellular Case Power Starterpack is part of Velocity Cellular Services that provides both the wireless services and products (cellular phones) to its clients. At the beginning of a cell phone contract‚ a cellular phone is sold with a wireless service that will generate cash for the service provider for the length of the contract; making Velocity Cellular Service multiple deliverables. Power Starterpack compromises of a single deliverable because the only service it is providing
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transformer at different load conditions: Thus‚ the different losses fall in to two categories Constant losses (mainly voltage dependent) and Variable losses (current dependent). The expression for the efficiency of the transformer operating at a fractional load “x” of its rating‚ at a load power factor of Cosθ2‚ can be written as ……… (1) Here S in the volt ampere rating of the transformer (V2‚ I2 at full load)‚ Pconst being Constant losses and Pvar the variable losses at full load. Pvar = (IFL)2
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ESSAY : "LOAD SHEDDING" Electricity load shedding in pakistan has incresed mainifold. Minister of water and power RAJA PERVAIZ ASHRAF assured that electricity load shedding would be done according to time schedule. He assured that electricity load shedding will finish by the end of the year 2009 but instead it is doubled what it was in the past year 2009. It is big failure of the government of pakistan. no country can make progress without electricity. Recent government
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