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Metabolic Muscular And Nervous Systems - 1,672 words
... ws the cross-bridge to detach and re-attach to another active site on an actin molecule. This contraction cycle is repeated as long as free calcium is available to bind the troponin and ATP is available to provide the energy. The signal to stop contraction is the absence of the nerve impulse at the neuromuscular junction. When this occurs, an energy requiring calcium pump located within the sarcoplasmic reticulum begins to move the calcium back into the sarcoplasmic reticulum. This removal of calcium from troponin causes tropomyosin to move back to cover the binding sites on the actin molecule and cross-bridge interaction ceases. It is possible for skeletal muscle to exert force without ...
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Adhd - 1,208 words
... n of responsibility for keeping the household running smoothly and meeting the needs of the children, the spouse with ADD, and, if he or she has time, his or her own priorities. Raising a child who has ADD can be an exhausting and, at times, frustrating experience. Parents play a key role in managing the disability. They usually need specialized training in behavior management and benefit greatly from parent support groups. Parents often find that approaches to raising that work well with children who do not have ADD, do not work as well with children who have ADD. Parents often feel helpless, frustrated and exhausted. Especially if the child's condition is unknown at the time. It could ...
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Regenerating Tissues - 1,336 words
The ability to regenerate the tissues of the human central nervous system (CNS) is one of the greatest projects undertaken by biomedical engineers today. With this eventual technology, permanent paralysis and blindness due to CNS injury will be a thing of the past. Central nervous system injuries will be repairable, an idea that was, until recently, just a fanciful dream, something out of a science fiction novel. In the last few years, however, giant strides have been made to make the idea of CNS regeneration a reality within the grasp of engineers and doctors alike. This technology has advanced to the point where successful tests are being performed on lower level adult mammals. If all cont ...
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Evolution Of The Nervous System Through Nine Animal Phylum - 1,502 words
The only multi-cellular animals without a nervous system are sponges. They do not have any nerve cells or sensory cells. Despite this, touch or pressure to the outside of a sponge will cause a local contraction of its body. Cnidarians The jellyfish and most all other forms of cnidarians, such as the hydra and sea anemone, are characterized by a nerve net. A nerve net is a series of interconnected nerve cells that conduct impulses around the jellyfishs entire body. The strength of the jellyfishs response is proportional to the strength by which the jellyfish is being stimulated. So, in other words, the stronger the stimulus is the stronger the reaction will be. Platyhelminthes The nervous sys ...
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Neuroligical Biology Of The Brain - 1,299 words
The definition of Brain as given in the Taber's Cyclopaedia Medical Dictionary is "Brain- a large soft mass of nerve tissue contained within the cranium; the carnal portion of the central nervous system. The anatomy of the brain is composed of neurons (nerve cells) and neuroglia or supporting cells. The brain consists of gray and white matter. Gray matter is composed mainly of neuron cell bodies and is concentrated in the cerebral cortex and the nuclei and basal ganglia. White matter is composed of neuron processes, which form tracts connecting parts of the brain with each other and with the spinal cord. The brain consists of three major parts: the cerebrum, cerebellum, and brainstem ( medul ...
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Alcoholism - 1,383 words
November 19, 2000 Research Paper Elizabeth Antalek One out of thirteen adults are considered to be an alcoholic or suffer from a drinking problem. Today, fourteen million Americans suffer from a disease that is caused by a combination of physiological, psychological, social, and genetic factors. Alcoholism is a developmental disease that progresses slowly over a number of years and is based on both the physical and emotional dependency on alcohol. In many cases it leads to brain damage and/or early death. Early symptoms include putting excessive importance on the availability of alcohol, which influences a person's choice pastimes and friends. Alcoholics use alcohol more as a personality cha ...
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