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Free research papers and essays on topics related to: bone marrow

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  • Aging Theories - 1,767 words
    ... ter a certain number of divisions, the clock genes are triggered and may produce proteins responsible for cell destruction (Keeton, 1992, 50). Cellular Aging In 1961, a discovery made by Leonard Hayflick showed that normal, diploid cells from such continually Areplaced@ parts of the body as skin, lungs, and bone marrow, divide a limited number of times. Although the cells stop dividing at the point just before DNA synthesis, they do not die. The longer-lived the species, the more divisions the cells undergo. As the age of an individual increases, the number of potential divisions decreases (Ricklefs and Finch, 1995, 29). This discovery was found using fibroblasts, or cells found in the c ...
    Related: aging, aging process, bone fracture, concise encyclopedia, testosterone
  • Aids - 1,140 words
    ... rom a few days to several weeks and is associated with fever, sweats, exhaustion, loss of appetite, nausea, headaches, soar throat, diarrhea, swollen glands, and a rash on the torso. Some of the symptoms of the acute illness may result from HIV-1 invasion of the central nervous system. In some cases the clinical findings have correlated with the presence of HIV-1 in the cerebrospinal fluid. Symptoms disappear along with the rash and other sings of acute viral disease. When the blood test for HIV-1 antibodies become available, researchers demonstrated the lymphadenopathy was a frequent consequence of infection with the virus. Scientist do not know what causes the wasting syndrome, but som ...
    Related: aids, immune system, human immunodeficiency, recent studies, regulation
  • Anemia - 398 words
    Anemia What is Anemia? Anemia is a deficiency of red blood cells or hemoglobin in the blood. The word anemia comes from two Greek roots, together meaning without blood. At the beginning of the nineteenth century, anemia referred to the pallor of the skin and mucous membranes. After medical science advanced, blood cell counts could be done. Anemia became the disease we know today. Symptoms of Anemia Mild anemia may have no outer symptoms. Weakness, fatigue, and pallor are very common symptom. Symptoms of severe anemia are shortness of breath, rapid heartbeat, lightheadedness, headache, ringing in the ears, irritability, restless leg syndrome, mental confusion, dizziness, fainting, and dimmed ...
    Related: anemia, cell anemia, iron deficiency anemia, bone marrow, family history
  • Animal Testing - 1,131 words
    ... rted to research facilities, and they suffered from cramping and over heating. The lack of adequate ventilation and extremes in temperature caused death to over 55 percent of the guinea pigs, hamsters and rabbits on their way to the research laboratory. This is not an isolated case, every year in Britain alone millions of animals suffer and die in laboratory experiments. They are burnt, scalded, poisoned and starved, given electric shocks and addicted to drugs, they are subjected to near freezing temperatures, reared in total darkness from birth and deliberately inflicted with disease like arthritis, cancer, diabetes, oral infections, stomach ulcers, syphilis, herpes and AIDS, (Sharpe, 1 ...
    Related: animal experimentation, animal research, animal testing, testing, using animals
  • Assistedsuicide Right Or Wrong - 1,299 words
    Assisted-Suicide Right Or Wrong Assisted-Suicide Right or Wrong Deciding when to die and when to live is an issue that has only recently begun to confront patients all over the world. There is an elderly man lying in a hospital bed, he just had his fourth heart attack and is in a persistent vegetative state. He is hooked up to a respirator and has more tubes and IV's going in and out of his body everywhere. These kinds of situations exist in every hospital everyday. Should physicians or doctors be allowed to assist patients, like this one, in death? Even though, physician-assisted suicide is illegal in the U.S., many doctors are helping suffering patients die. Physicians should not provide t ...
    Related: medical care, physician assisted suicide, prescribe medication, compassionate, consumer
  • Automobile Emissions - 1,899 words
    Automobile Emissions Pollution from automobile emissions has become over the past few decades an issue of great concern. With a growing number of motor vehicles on our roads great concern has been attributed to the effects of these emissions to our health and to the environment. Several of the gases emitted, which when present in certain concentrations in our atmosphere can be toxic, therefor these ultimate concentrations must never be achieved. Strict legislation as well as sophisticated control technology has been implemented in the automotive industry in order to limit the pollution caused. These aspects of automotive pollution shall be further discussed in this paper. KEYWORDS: Pollution ...
    Related: automobile, emission control, term effects, health effects, hemoglobin
  • Biotin - 873 words
    Biotin Biotin is important for healthy hair and skin. 100 mg of biotin may prevent hair loss in some men. Biotin helps to relieve muscle pain. It promotes healthy nerve tissue, bone marrow and sweat glands. It also relieves seborrheic dermatitis in infants. Biotin works with folic acid and vitamin B12 to break down fats, protein, and carbohydrates. Biotin is found in most foods and also manufactured by bacteria in the intestinal tract. Most biotin deficiencies are associated with the consumption of raw egg whites which contain avidin. Avidin binds with biotin to prevent its absorption into the blood. Cooking the egg whites deactivates avidin. Biotin is non-toxic and probably not required in ...
    Related: information age, amino acids, side effects, marrow, fashion
  • Black Plague - 1,461 words
    Black Plague As a young adult I must endure many scary realities of this world. Everyday a new challenge, obstacle, fear stares me right in the eye. The sugarcoated, innocent, never never land is quickly shedding from my reality and I am faced with the truths of this cynical world. Truth. Do I know the meaning of this word? What if all I have trusted had been false, what if those endless nights I lied awake worried over the latest medical news, or any news for that matter, was all just a waste of potentially productive time? What if the world as we know it was all just a hoax and a set up to make the men in the white coats rich? According to Dr. Peter Duesberg, HIV as we know it is not the c ...
    Related: black plague, plague, deficiency syndrome, risk factor, incorrect
  • Bone Fractures - 1,435 words
    Bone Fractures Bone Fractures Thank goodness it's only a fracture. I thought it might be broken. People often think that a fracture is less severe than a broken bone, but fractures are broken bones. To understand why bones break, it helps to know what bones do and what they are made of. The bones of the body form the human frame, or skeleton, which supports and protects the softer parts of the body. Bones are living tissue. They grow rapidly during one's early years, and renew themselves when they are broken. Bones have a center called the marrow, which is softer than the outer part of the bone. Bone marrow has cells that develop into red blood cells that carry oxygen to all parts of the bod ...
    Related: bone, bone marrow, older people, medical treatment, plastic
  • Cancer - 1,894 words
    ... Bibliography Of all the diseases and viruses that are known to man, no other can strike fear in so many peoples hearts, as the word cancer. What is cancer? Cancer is a new growth of tissue resulting from a continuous proliferation of abnormal cells that have the ability to invade and destroy other tissues.1 Cancer may be found in any type of cell or tissue in the human body. Cancer is not found in just humans, but also in animals and plants. Cancer cells can grow where ever normal cells grow or divide. Cancer is not one disease but many single diseases classified under one name.2 In our bodies we produce many thousands of new cells everyday. We produce these cell in order to grow until ...
    Related: american cancer, breast cancer, cancer, cancer research, cancer society, colon cancer, human cancer
  • Cancer Treating - 955 words
    Cancer Treating During a shower one-day, you notice a lump that was not otherwise there. The next day you see a doctor. The lump you have identified is diagnosed as cancer. Now you need to figure out what to do. There is no absolute cure for cancer, but there are different ways to treat it. Doctors use according methods like radiation, chemotherapy or drugs to treat various types of cancer. Another way of treating cancer is with alternative forms of medicine by using acupuncture and natural herbal remedies. These treatments are more often used in cases that can not be treated very or at all. However, when using the combination of the two treatment techniques, one can receive the full benefit ...
    Related: cancer, skin cancer, treating, side effects, eating habits
  • Cell Phones - 1,620 words
    Cell Phones What Causes Cell Phone Radiation and How Does it Effect Your Body? What is so popular with young teenagers today? Cell phones. Walking around on campus to walking around at the mall with your cell phone may seem fashionable and trendy, but did you now that it might be causing you to get a cancer? Ninety percent of cell phone holders do not realize it and it should be something everyone should be aware of. It may seem a bit unusually how a cell phone can cause a child or an adult to get cancer, but it is true. New evidence is growing fast about health risks from mobile phones electromagnetic radiation. These devices can be used to make telephone calls from almost anywhere. Sympto ...
    Related: cell, cell phone, cell phones, mobile phone, electromagnetic radiation
  • Chemistry Research - 2,121 words
    Chemistry Research CHAPTER 32 The tallest tree is the Redwood (Sequoia sempervirens) approx 110 m The tallest Angiosperm is the Australian Eucalyptus regnans Water Uptake and transport (Fig. 32.1) = water is essential because: transport solute, cool the body, photosynthesis and Turgor pressure Osmosis- movement of H2) through a semi-impermeable membrane Osmotic potential ( o)-depend on dissolve solute: Hi concentration means more negative o. Isoosmotic-two solution with same o; Hypoosmotic- solution that has a less negative o(more +) Turgor Pressure -hydraulic pressure result from water up take, cell turgid; analog to air pressure in a tire Water Potential ( )-Overall tendency of a solution ...
    Related: chemistry, respiratory system, nervous system, endocrine system, poison
  • Chernobyl - 1,003 words
    Chernobyl La era nuclear empieza a partir de la Segunda Guerra Mundial, a 50 aos de este suceso histrico, dos ciudades nuevas se han levantado de las cenizas atmicas de esta catastrfica guerra. En una de estas ciudades, Chernobyl, a diez aos de la explosin nuclear, poblaciones enteras han sido abandonadas alrededor del reactor destruido, para escapar del agua y del alimento contaminados producidos en el suelo que una vez fuera rico. En el mismo perodo desde la Segunda Guerra Mundial, la mayora de los bosques tropicales fueron destruidos. Se encontro una declinacin dramtica en las especies de plantas y de animales. Los antroplogos registraron una catstrofe global tan enorme que probablemente ...
    Related: chernobyl, bone marrow, fuel cells, immune system, migration
  • Circulatory System - 1,361 words
    CIRCULATORY SYSTEM (A) FORMATION OF TISSUE FLUID AND EXCHANGE OF MATERIALS IN THE CAPILLARY NETWORK In a capillary network, two opposing forces mainly determine the movement of fluid between the blood and tissue fluid: (1) the hydrostatic pressure difference and (2) the osmotic potential difference between the blood and the tissue fluid. In the part of the capillary network near the arterial end, blood pressure is much higher than that of the tissue fluid so that the difference in hydrostatic pressure exceeds the osmotic difference between the two fluids. As a result, some plasma is filtered out of the capillaries under pressure into the tissue space to form tissue fluid. As blood moves alon ...
    Related: circulatory, circulatory system, surface area, bone marrow, narrow
  • Circulatory System - 1,289 words
    ... her factors include abnormalities in the proteins that regulate blood cell production and a malfunctioning immune system that interferes with the normal blood cell production. Certain environmental factors have been associated with the development of plastic anemia. Chemotherapy drugs such as busulfan or antibiotics such as chloraphenicol can cause temporary or prolonged plastic anemia. Chemicals such as benzene and pesticides, infections such as viral hepatitis and mononucleosis, autoimmune disorders and ionizing radiation also has been linked to the development of plastic anemia. Although exposure to these agents increases the risk of developing plastic anemia, it is proven that they a ...
    Related: circulatory, circulatory system, immune system, viral hepatitis, good health
  • Cloning - 1,206 words
    Cloning Cloning Twenty-five years ago, scientists thought that cloning was virtually impossible. In the last five years, the science of cloning, has come to realization. What is a clone? A clone is a duplicate - much like a photocopy is a duplicate, or copy, of a document (Kolate, 238). A good example of copies that occur in nature are identical twins, which are duplicates of each other. On a daily basis, molecular geneticists and other scientists use cloning techniques to replicate various genetic materials such as gene segments and cells (Kolate, 238). Recently the cloning of a living life form was brought from the realms of science fiction to reality with the cloning of a sheep named Doll ...
    Related: cloning, human cloning, science fiction, growth hormone, drugs
  • Cloning - 659 words
    Cloning Nicole Pluta November 29, 1998 Scientific experimentation has led us to many great discoveries such as: Chemotherapy, heart surgery, and bone marrow transplants. Recently scientists have discovered a new way to heal humans. This is known as cloning. Although they have yet to clone a human they have cloned sheep. Cloning has brought up a huge controversy among the American people. There are two sides to the story. Either you agree with cloning or you dont. The only way to help make that decision is to look at the good and bad points of cloning. There are many positive aspects of human and non-human cloning. Human cloning technology could be used to reverse the number one killer in the ...
    Related: cloning, cloning human cloning, human cloning, bone marrow, scientific experimentation
  • Cloning - 669 words
    Cloning Cloning: Recently, we have all seen the controversy over whether or not we should attempt to clone. If you haven't heard: A group of scientists in Scotland announced the birth of a sheep cloned from embryonic cells, presaging Dolly. Dolly's was the birth heard round the world. The first mammal ever cloned from a single adult cell, she was living proof that scientists had solved one of the most challenging problems of cell biology. Her creation raised a troubling question: Can humans, too, be cloned? And if so, Should humans be able to play God? Cloning has been an idea that the world has awaited and feared for decades. Cloning has been around since the 1950s when 2 scientists made a ...
    Related: cloning, human cloning, endangered species, bone marrow, sheep
  • Cloning - 918 words
    Cloning Cloning In the past few years, the topic of cloning has been in the news a lot. It is a very controversial issue, with many opposing viewpoints. While some find it acceptable, others object for religious reasons. A big concern is the possibility of abuse of this new technology. One of the big questions is Where will we stop? We may start by just experimenting and studying, but then what? Manufacturing human bodies for spare parts? No one can be sure where it will stop. The Supreme court says that everyone has the right to make their own reproductive decisions without government interference, but now it is proposing bans on human cloning. These bans prevent the very research needed to ...
    Related: cloning, cloning human cloning, human cloning, organ transplant, heart attack
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