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Free research essays on topics related to: experimental technique

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  • And Inventions - 1,136 words
    ... drawings, especially of the human body. He studied anatomy by dissecting human corpses and the bodies of animals. Leonardo's drawings did not only clarify the appearance of bones, tendons, and other body parts but their function in addition. These drawings are considered to be the first accurate representations of human anatomy. Leonardo is also credited with the first use of the cross section, a popular technique for diagramming the human body. Leonardo wrote, "The painter who has acquired a knowledge of the nature of the sinews, muscles, and tendons will know exactly in the movement of any limb how many and which of the sinews are the cause of it, and which muscle by its swelling is t ...
    Free research essays on topics related to: natural world, pope leo x, left hand, submarine, completing
  • Leonardo - 1,136 words
    ... drawings, especially of the human body. He studied anatomy by dissecting human corpses and the bodies of animals. Leonardo's drawings did not only clarify the appearance of bones, tendons, and other body parts but their function in addition. These drawings are considered to be the first accurate representations of human anatomy. Leonardo is also credited with the first use of the cross section, a popular technique for diagramming the human body. Leonardo wrote, "The painter who has acquired a knowledge of the nature of the sinews, muscles, and tendons will know exactly in the movement of any limb how many and which of the sinews are the cause of it, and which muscle by its swelling is t ...
    Free research essays on topics related to: leonardo, leonardo da vinci, pope leo x, experimental technique, completing
  • Cloning - 1,283 words
    When one thinks of cloning, what comes to mind? Movies such as Multiplicity can give the layperson a much-distorted image of cloning. In this particular movie, actor Michael Keaton plays a father who cannot handle his crazily busy lifestyle. In an effort to be the perfect father, husband and employee, he has himself cloned easily at a nearby medical center. The three clones each have their own personality: one is sarcastic and bitter, one is sweet and sensitive and one is a half-wit but all are identical. This cloning process is false. At this time, scientists have cloned animals including Rhesus monkeys, mice and probably the biggest breakthrough: sheep. Cloning could mean hope for so many ...
    Free research essays on topics related to: cloning, human cloning, organ transplantation, small group, artificial
  • A Summary Ion Channels In The Nervecell Membrane - 865 words
    A Summary: Ion Channels in the Nerve-Cell Membrane In this article, Richard D. Keynes details the workings of ion channels in nerve cell membranes. Nerve impulses (action potentials) are the unit by which information travels in an organisms nervous system, and the generation of this action potential is dependent on the nerve membrane being permeable to ions which in turn makes said membrane excitable. Electrical activity of a nerve is triggered by a depolarization across the membrane and this also causes the sodium channels to open and allow sodium ions to flow inward due the electrochemical gradient. Eventually, the membrane potential falls to zero, the sodium channels close, and potassium ...
    Free research essays on topics related to: membrane, summary, nervous system, experimental technique, analyzing
  • Animal Testing Introduction - 1,744 words
    ... C. If humans inhale a small amount of prussic acid fumes it can kill them. However, toads, sheep and hedgehogs can drink it without any harm; Scopolamine can kill humans with a dose of just 5 milligrams. To dogs and cats about 100 milligrams was considered harmless. Information like this can be misleading when scientists try to determine safe dogages. Penicillin, the first antibiotic, was experimented first on mice. Its application on guinea pigs would have entailed dangerous consequences, because penicillin controls the floral bacteria in the stomachs of guinea pigs and destroys them within a few days. The unpredictability of animal testing was thought to have harmful effect in the case ...
    Free research essays on topics related to: animal cells, animal cruelty, animal experimentation, animal research, animal testing, testing

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