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  • Muscle Contraction Essay

    848 Words  | 4 Pages

    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

  • The Effects Of Different Stresses On Frog Cardiac Muscle

    2009 Words  | 9 Pages

    Effects of Different Stresses on Frog Cardiac Muscle Brett Cashion Laboratory Partners: Michael Comisac, Haylee Kaushaar, Jessica Self, and Kaitlyn Strosnider April 22, 2015 Department of Biological and Environmental Sciences California University of PA BIO 318, Human Physiology Introduction: The heart is made up of cardiac muscles that are striated, involuntary, and contains intercalated disks which consist of gap junctions that send electrical signals to the heart. In order for

  • Myasthenia Gravis: It's Diagonosis and Treatment Essay

    1844 Words  | 8 Pages

    The functional loss of AChRs reduces the probability of successful neuromuscular transmission following adequate release of acetylcholine by the motor nerve terminal (Gardener,1968).The relationship between myasthenia gravis and thymoma was noted more than 200 years ago,thymic abnormalities are found in nearly 75% of patients with myasthenia gravis.Of these ,germinal hyperplasia

  • Ans Nervous System Essay

    1297 Words  | 6 Pages

    The preganglionic fibre from the medulla or spinal cord projects to ganglia very close to the target organ and makes a synapse. This synapse uses the neurotransmitter called acetylcholine. From this ganglion, the postganglionic neuron projects to the target organ and uses acetylcholine again at its terminal. Figure. 1: Autonomic nervous system Para-sympathetic and sympathetic differences: The sympathetic and parasympathetic nervous system generally have opposing effects

  • Daphnia Lab Essay

    1153 Words  | 5 Pages

    Daphnia and Additives Lab Purpose The purpose of this lab is to test what effect of Nicotine, Acetylcholine, Epinephrine, Caffeine, and Ethanol on an organism’s heart rate. Materials * Microscope * Eye dropper * Pipet * Cotton balls * Depression slide * Beakers * Daphnia * Water * Five additives: Nicotine, Acetylcholine, Epinephrine, Caffeine, Ethanol Procedure 1. Put on safety goggles. 2. Catch a living Daphnia. 3. Transfer to a depression

  • Essay Diagnosis and Treatment of Myasthenia Gravis

    1026 Words  | 5 Pages

    called neurotransmitters are released. When acetylcholine reaches the muscles side of neuromuscular junction, it attaches and locks into receptors. If anything interferes with these steps, the nerve will not be able to control muscle contraction. When there is an interruption of normal communication between the nerves and the muscles at the neuromuscular junction, myasthenia gravis occur. This interruption is caused by antibodies that prevent acetylcholine from reaching muscle by destroying or blocking

  • Essay Activity of Gastrointestinal Smooth Muscle Worksheet

    1971 Words  | 8 Pages

    phentolamine and atropine on the contractile response to acetylcholine in the isolated rabbit ileum | | |Contraction amplitude with the | | | |Contraction amplitude |maximum response to |Effect of acetylcholine on the contraction amplitude | | |pre- acetylcholine |acetylcholine |

  • unit 15 study guide Essay examples

    798 Words  | 4 Pages

    and discuss how sustained neural activity could create a dysfunction and result in a decrease in muscle response during repetitive motor nerve stimulation. If the nerve impulse is not released than it will not cause an action potential. If acetylcholine is not liberated than it would also not cause an action potential which would not cause a muscle contraction. If the calcium and sodium channels remain open, it would cause a uncontrolled muscle twitch. Part IV: 1. What is the role

  • Alzheimer 's Disease : A Disease That Affects More Elderly People

    906 Words  | 4 Pages

    January 2013 my grandmother passed away after battling Alzheimer’s disease. Alzheimer’s disease is a brain disease that is permanent and is affecting more elderly people every day. This horrible disease changes the memory and thinking in the brain. Researchers, for years, have been trying to find a way to stop the progression of Alzheimer’s. Researchers, with the help of doctors have been successful finding a way to slow down the progression, but not completely stop it. Although Alzheimer’s is a

  • Reaction Paper On Donepezil

    1044 Words  | 5 Pages

    It is approved by United States Food and drug administration and has been marked safe for patients of Alzheimer’s disease treatment as well as treatment of Parkinson’s disease. It considerably slows down the pace of memory loss by accelerating acetylcholine in the brain cells which vanishes the hindrance arising between blood circulations within the brain cells. It has also been approved for the treatment of chronic diseases like Down’s syndrome and Schizophrenia.