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Free research papers and essays on topics related to: white blood cells

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  • White Blood Cells - 556 words
    White Blood Cells White Blood Cells Bacteria exist everywhere in the environment and have continuous access to the body through the mouth, nose and pores of skin. Further more, many cells age and die daily and their remains must be removed, this is where the white blood cell plays its role. According to this quotation, without white blood cells, also known as leukocytes, we would not be able to survive. White blood cells are our body's number one defense against infections. They help keep us clean from foreign bacteria that enter our bodies. Statistics show that there are five to ten thousand white blood cells per micro liter of blood, however this number will increase during an illness. Whi ...
    Related: blood, blood cells, white blood cells, bone marrow, different kinds
  • 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 - 1,527 words
    ... AIDS from handshakes, hugs, coughs, sneezes, sweat, tears, mosquitoes, or other insects, pets, eating food prepared by someone else, or just being around an infected person. A person can't get it from sharing a cigarette, cigar, or pipe, drinking from the same fountain, or from someone spitting on him or her. A person also can't get it from using the same swimming pools, toilet seats, phones, computers, straws, spoons, or cups. Although the virus has been found in saliva, medical opinion states there is no evidence of contamination through wet kissing(What are HIV/AIDS 1). HIV is not spread through the air or water, unlike many other viruses(HIV/AIDS 2). No one has ever caught AIDS by go ...
    Related: aids, protease inhibitors, local government, state and local government, isolated
  • Aids - 1,140 words
    ... f the mouth by the fungus Candida Albicans, is common in the early symptomatic phase of AIDS. Other infectious fungi include species of the genus Cryptococcus, a major cause of Meningitis in up to 13 percent of people with AIDS. Also, infection by the fungus Histoplasma Capsulatum affects up to 10 percent of people with AIDS, causing general weight loss, fever, and respiratory complications or severe central nervous system complications if the infection reaches the brain. Viral opportunistic infections, especially with members of the Herpes virus family, are common in people with AIDS. One Herpes family member, Cytomegalovirus (CMV), infects the retina of the eye and can result in blindn ...
    Related: aids, blood cells, nervous system, human cells, nose
  • Aids - 1,178 words
    Aids For an epidemic that would explode to claim hundreds of thousands of lives, AIDS surfaced very quietly in the United States, with a small notice on June 4, 1981 in a weekly newsletter published by the Centers for Disease Control in Atlanta, alerting doctors to five unusual cases of pneumonia that had been diagnosed in Los Angeles residents over the previous few months. All the patients were homosexual men who had come down with PCP (Pneumocystis carinii pneumonia), a lung infection usually seen only severely malnourished children or adults undergoing intensive chemotherapy. But until they got sick the California men were well nourished, vigorous adults, whose immune systems should have ...
    Related: aids, aids epidemic, aids research, high blood pressure, blood cells
  • Aids - 1,410 words
    Aids Aids by sean ross How is HIV Diagnosed? You can get tested for HIV in a number of locations -- including public clinics, AIDS organizations, physicians' offices, and hospitals. Many locations give the test for free. You can choose between anonymous tests, in which you do not give your name to the HealthCare provider, or confidential tests, in which you do give your name. Test sites should provide trained counselors who can offer you support and guidance, no matter what the test result.(Balch-97) An HIV test looks for the antibodies your immune system creates in response to the virus. These antibodies may not appear in your blood until three to six months after HIV infection. Therefore, ...
    Related: aids, aids hiv, aids research, disease control, santa monica
  • Aids In Detail - 2,125 words
    ... ne anonymous partner per year. Homosexual men have higher rates of sexually transmits diseases than heterosexual men and women because gay men tend to have larger numbers of different sexual partners, more often engage in furtive (anonymous) sexual activities, and more frequently have anal intercourse. PUZZLING SYMPTOMS Any theory of the new disease also had to account for a puzzling factor: the variety of symptoms seen in AIDS patients before they entered the final phase of complete susceptibility to opportunistic infections and cancers. Interviews with AIDS patients revealed many had been very sick for up to a year before they developed their first case of Pneumocystis pneumonia or sho ...
    Related: aids, life expectancy, men and women, hepatitis a, discovery
  • Aids Whats New Is The Message Getting Through We Already Know Enough About Aids To Prevent Its Spread, But Ignorance, Complac - 1,708 words
    AIDS - What's new ? ------------------- Is the message getting through? We already know enough about AIDS to prevent its spread, but ignorance, complacency, fear and bigotry continue to stop many from taking adequate precautions. We know enough about how the infection is transmitted to protect ourselves from it without resorting to such extremes as mandatory testing, enforced quarantine or total celibacy. But too few people are heeding the AIDS message. Perhaps many simply don't like or want to believe what they hear, preferring to think that AIDS "can't happen to them." Experts repeatedly remind us that infective agents do not discriminate, but can infect any and everyone. Like other commun ...
    Related: aids, whats, human cells, blood cells, usual
  • Allergies - 1,744 words
    Allergies An allergy is an abnormal reaction to ordinarily harmless substance or substances. These sensitizing substances, called allergens, may be inhaled, swallowed or come into contact with the skin. When an allergen is absorbed into the body it triggers white blood cells to produce IgE antibodies. These antibodies attach themselves to mast cells causing release of potent chemical mediators such as histamine, causing typical allergic symptoms. A person who has allergies doesnt have a poor immune system, rather an over protective one. Their immune system fights the allergen when it comes in contact with it even though the allergen isnt harmful. To diagnose allergies a physician will clean ...
    Related: high blood pressure, blood sugar, weight gain, sensitive, remove
  • Aromatherapy - 1,357 words
    Aromatherapy There are literally hundreds of types of unconventional medicines. An unconventional medicine is any type of therapy that is different from traditional medicine in the way that it focuses on a patients mind, body, and inner energy, to aid in healing. Some, use magic charms, colour therapy, sound therapy, and juice therapy, in which natural juices are used as tonic therapies. Flower remedy is a system of natural medicine that uses remedies distilled from blooming plants and trees, and some followers believe that flowers are natures gentle tools for treating and preventing disease. (Gottlieb,1995:37) There is even a healing process called food therapy. It involves a healthy diet a ...
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  • Bibliography: This Is My First Biology Paper My Major Is Psychology I Attend An University In Maryland Parttime I Am A Colleg - 1,764 words
    Bibliography: This is my first Biology paper. My major is Psychology. I attend an university in Maryland part-time. I am a college Sophomore. I work in Communications. UNDERSTANDING THE AIDS VIRUS Will I live to see tomorrow? Is there a hope for the future? These are probably the most commonly asked questions among AIDS patients today. This paper delves into the heart of the AIDS topic by giving a detailed definition of the virus, risk factors associated with transmission, and the best treatment methods studied by the Centers for Disease Control, the National Institutes of Health, and other research organizations. AIDS. The word alone strikes fear into every sexually active individual. Why i ...
    Related: attend, biology, maryland, psychology, san francisco
  • Biological Viruses: All Time Enemies - 1,170 words
    Biological Viruses: All Time Enemies First came fever. Then Hamid Mansaray, a young nurse's aide at a remote African hospital, began to hemorrhage. Blood erupted from his nose and mouth. It burst out of capillaries beneath his skin and eyes. By the time I reached the village of Panguma in Serria Leone, Mansaray lay isolated in a special ward. Doctors had diagnosed an obscure illness called Lassa fever. Its cause was a virus, an infective agent so small that 100,000 of them clumped together would still scarcely be visible. Viruses are little more than bundles of genes - strands of DNA or RNA, the molecules that carry the blueprints for all life. Yet viruses are far from simple. They invade ar ...
    Related: biological, white blood cells, yellow fever, common cold, contracts
  • Biology Project Aids - 836 words
    Biology Project - A.I.D.S. A.I.D.S. (Acquired Immune Deficiency Syndrome) is a very deadly disease. It is mostly translated through the blood, sharing needles, sexual intercourse, and when an infected mother breast-feeds her child. In this essay I will show you the causes, symptoms, clinical progression, opportunistic infections, and the treatment you can receive to delay the effects of aids. Aids are caused by two viruses that belong to a group called retroviruses. Researchers in France discovered this in 1983 and in the U.S. in 1984. This was known as the HIV-1. HIV infects certain white blood cells. Some of these cells are the T-helper and the macrophages, which play key roles in the immu ...
    Related: aids, biology, weight loss, white blood cells, replication
  • 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
  • Breast Cancer - 1,598 words
    Breast Cancer Hereditary breast cancer is a disease caused by mutations on breast cancer suppresser genes (ACCV Pg.17). Mutations allow normal cells to divide abnormally (ACCV Pg.13). Resulting cells divide faster as they do not specialize and form useless lumps of cells called malignant tumours (ACCV Pg.13). Genetic Screening is the process where Deoxyribonucleic Acid (DNA) fragments are analyzed for a specific gene. The purpose is to identify individuals carrying disease causing genes so they can change their life style and also help invent a cure (ACCV Pg.20). This is done by amplifying DNA withdrawn from an individual, then specific gene mutations are targeted using the Electrophoresis p ...
    Related: breast, breast cancer, cancer, fact sheet, clinical practice
  • Bronchitis - 828 words
    Bronchitis Bronchitis is the inflammation of the bronchi. It may develop suddenly, following a head cold (acute bronchitis), or it may persist or return regularly for many years, causing progressive degeneration of the bronchi and lungs (chronic bronchitis). Certain people are more susceptible than others; Men are more of a target to bronchitis than women, out numbering them 10 to 1 cc the reasons are unclear. Of course smokers are 50 times more likely to get chronic bronchitis than noncsmokers. Acute bronchitis is a bacteria or virus infection, often following a cold smoking. People who have acute bronchitis usually have a mild fever, soreness under breast bone, irritated by coughing. First ...
    Related: bronchitis, stop smoking, white blood cells, best treatment, viruses
  • Cancer - 1,605 words
    Cancer Final Draft T. J. Cox The problem is cancer. Cancer is the second leading cause of death in the world and my interest in the subject is simple. My mother is the most resilient person I have ever met. Any time I need any kind of inspiration, I need only to think of her. When she was eighteen she was diagnosed with Hodgkins disease. The doctors gave her a less than thirty percent chance of living. Since then she has had cancer three other times. Breast cancer twice in 85 and 90, and most recently, colon cancer two summers ago. She has had many different treatments including chemo and radiation therapy as well as surgery to remove lumps in both breasts and her colon. What is cancer? Ther ...
    Related: breast cancer, cancer, cancer therapy, colon cancer, radiation therapy
  • 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
  • Cells Of The Human Body - 2,204 words
    ... lum of skeletal muscle stores calcium ions that function in muscle contraction. GOLGI APPARATUS The Golgi apparatus is composed of flattened membranous sacs, containing cisternae, that are stacked on each other like dinner plates. The Golgi apparatus modifies, packages, and distributes proteins and lipids manufactured by the rough and smooth endoplasmic reticula. Proteins produced at the ribosomes of the rough endoplasmic reticulum are surrounded by a vesicle, or little sac, that forms from the membrane of the endoplasmic reticulum. The vesicle moves to the Golgi apparatus, fuses with the membrane of the Golgi apparatus, and releases the protein into the cisterna of the Golgi apparatus. ...
    Related: blood cells, cell division, human body, white blood cells, health care
  • 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 ...
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