Exercise 8 Simple Muscle Contraction • 3 Phases AB - lag phase or latent phase - (shortest) 0.00sec‚ usually less than 0.01sec - brief period that exists between the application of the stimulus and the start of contraction BC - contraction‚ 0.05sec - peak - shortening of the muscle occur CD - relaxation period‚ 0.05 sec - Occurs when Ca+ is transported back in the sarcoplasmic reticulum Single muscle contraction= 100vib/sec (tuning fork)= 0.10 sec 10vib (result) Neuromuscular junction - formed when
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the body while the patient lies flat on a bed or table. 2. An EKG evaluates: a) Injuries to the heart muscle. b) The pacemakers and conductive system function. c) The response toward medication. d) All of the above. 3. An electrode: a) is a paper‚ plastic or metal sensor placed on the patient’s skin on a specific location and transmits it to the cable. b) is a wire that connects the
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power supply to create and electric arc between an electrode (the dictionary defines electrode as “A conductor through which electricity enters or leaves an object‚ substance‚ or region.”) and the base material to melt the metals at the meeting point. What equipment and consumables are needed in a basic electric arc welding setup? The equipment and consumables needed for a basic electric arc welding setup are: * Welding machine * Electrode * Cables * Clamps * Metal to be welded
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THE PSYCHOLOGICAL REACTIONS CAUSED BY RELAXATION AND AROUSAL ABSTRACT: This study’s main reason is to explore the psychological reactions by the idea of relaxation and arousal. A total of thirty eight students t part in this experiment. This study followed a within subject design in witch the independent variables were the music‚ witch was playing in the start‚ the touch stimuli and the music‚ witch was playing in the end of the experiment. However the dependent variables were the galvanic skin
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suspended on the carbon nanotube meshes‚ possesses excellent mechanical performance‚ optical transparency and good electrical conductivity. The ultra-thin hybrid film features an electron transparency close to 90%‚ which makes it an ideal gate electrode in vacuum electronics and a highperformance sample support in transmission electron microscopy. 1 State Key Laboratory of Low-Dimensional Quantum Physics‚ Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center‚ Tsinghua
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Chemistry Exam Revision - Redox & Electrochemical Series - Define oxidation and reduction in term of loss and gain of oxygen; loss and gain of electrons and change in oxidation state (number). • Oxidation is the loss of electrons; an increase in oxidation state or a gain in oxygen by a molecule‚ atom‚ or ion. • Reduction is the gain of electrons; a decrease in oxidation state or a loss of oxygen by a molecule‚ atom‚ or ion. • OIL RIG (Oxidation is Loss‚ Reduction is Gain) - Rules for assigning
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E X E R C I S E 3 Neurophysiology of Nerve Impulses O B J E C T I V E S 1. To define the following terms: irritability‚ conductivity‚ resting membrane potential‚ polarized‚ sodium-potassium pump‚ threshold stimulus‚ depolarization‚ action potential‚ repolarization‚ hyperpolarization‚ absolute refractory period‚ relative refractory period‚ nerve impulse‚ compound nerve action potential‚ and conduction velocity. 2. To list at least four different stimuli capable of generating
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Christine Medeiros BIOL.2401.S2L Roland Tay‚ M.D.‚ M.A. 30 July 2012 Analyzing an Electroencephalography Report (EEG)… The importance of complete and well recorded data in analyzing an EEG The summary of findings is only as detailed as the data reported. Introduction The electroencephalogram‚ also known as the EEG is the recording of electrical activity of the brain in various states of rest or stimulation. The test is performed using the electroencephalography machine which records
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movement. 11. What is a microelectrode. How do intra-and extracellular recording differ. A microelectrode is a tiny electrode inserted into the brain that can record the activity of an individual cell. Extracellular recordings are when the electrode is placed next to the cell and can distinguish the activity of upto 40 neurons at once. Intracellular recordings have the electrode placed inside the cell and allow direct study of that single neuron’s electrical activity. 12. What is a “place” cell
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slowly and observe the reaction. Next‚ place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. 4. Electrolysis of water Use a U-tube with electrodes at each end‚ connected to a battery. Fill the U-tube with water. Turning on the battery‚ observe the results at each electrode. Next‚ test for hydrogen and oxygen gas produced at each end of the tube. 5. Burning magnesium Place magnesium ribbon in a clean crucible (on a clay triangle above a Bunsen burner)
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