By E. Marius. The Graduate Center, City University of New York. 2018.
In particular a study conducted by a team headed by Richard Doll purchase zudena 100 mg free shipping erectile dysfunction drugs levitra, famed for revealing the smoking-lung cancer link forty years earlier zudena 100mg lowest price erectile dysfunction kaiser, concluded that ‘among British men in middle or older age, the consumption of an average of one or two units of alcohol a day is associated with significantly lower all-cause mortality than is consumption of no alcohol, or the consumption of substantial amounts of alcohol’ (Doll et al. It appeared that drinking a 48 THE REGULATION OF LIFESTYLE couple of glasses of wine a day had a ‘cardio-protective’ effect, reducing the risk of coronary heart disease. Doll’s paper provoked an angry denunciation from the director of the World Health Organisation’s ‘programme on substance abuse’, whose response is quoted at the head of this section. The WHO was concerned that the publicity given to this study might encourage people to start drinking: ‘we are seeking to demystify the idea that alcohol is good for your health and to debunk the idea that to have a drink a day will keep the doctor away’ (Craft 1994). The following year, the royal colleges reviewed their anti-alcohol guidelines in the light of the discovery that the graph of mortality against alcohol intake was not linear, but ‘J-shaped’. These eminent medical authorities acknowledged the new research but recommended that there should be no change from the current 21/14 recommendations, which were ‘prudent’ and ‘justified’ (indeed Doll et al. However, in December 1995, in an apparent surge of Christmas cheer, the government announced new guidelines, recommending limits of 3–4 units a day for men and 2–3 units a day for women (DoH 1995). Though health minister Stephen Dorrell denied any intention of raising the threshold of ‘sensible drinking’, simple arithmetic revealed new weekly limits of 28 for men and 21 for women. This statement was immediately branded a ‘boozers’ charter’ in the tabloid press and as fervently condemned by the anti- alcohol movement as it was welcomed by the drink trade. The BMA described the government’s initiative as ‘both irresponsible and badly timed’ and the Royal College of Physicians complained that ‘by raising the “sensible limits” people are being encouraged to drink more’ (Times, 13 December 1995). This is how two leading epidemiologists posed the problem confronting health promotionists in this area: Is it possible to persuade older non-drinkers to drink a little for the benefit of their health, and is it possible to do this without increasing the number of people, especially teenagers, who drink at levels that are dangerous? For the vast majority of people, whether they are teetotallers 49 THE REGULATION OF LIFESTYLE or drunks, or at some point on the wide spectrum in between, concerns about health are not a significant factor in their drinking behaviour. People may drink alcohol in varying quantities (or may not drink at all) for all sorts of cultural, social and psychological reasons. In my experience most habitual heavy drinkers are well aware that alcohol does not have a beneficial effect on their health, but reminding them of this does not inhibit their consumption. People who drink only occasionally or not at all have their own reasons, among which concerns about health are not likely to be prominent. Only an epidemiologist could believe that either a middle aged non-drinker sitting at home or a teenager going out on a weekend is going to be influenced by government propaganda advising them of the health benefits of ‘sensible drinking’. But then only an epidemiologist could believe that data based on ‘self- reported’ levels of alcohol consumption can provide a useful basis for quantitative studies. The power of the ideology of health promotion is such that even its critics sometimes fall back on attempts to justify a particular lifestyle choice in terms of health. Thus, campaigners against the tyranny of counting units of alcohol in different beverages have seized on associations between moderate levels of alcohol consumption and reduced mortality to bolster their case. As Dalrymple observes, ‘even those who warn against health fanatics forget their own principles when an association emerges that pleases them’ (Dalrymple 1998). Both arguments, based—like most of the epidemiology underlying health promotion—on the confusion of association with causation, are equally irrational. Opponents of the ‘health fanatics’ would be on stronger ground if they pointed out that drinking alcohol in its wonderful diversity of forms is a highly pleasurable activity which has, in general, nothing to do with health. The familiar fact that some people drink an excessive amount of alcohol, causing adverse physical, psychological and social consequences, is strictly irrelevant to the drive to regulate the drinking habits of the entire population in the name of health. Exercise Over the past couple of years I have been able to refer my patients to an ‘Exercise on Prescription’ scheme organised by Hackney Council ‘education and leisure’ services in collaboration with the local health authority (Hackney Education and Leisure 1997). Under this scheme 50 THE REGULATION OF LIFESTYLE I can refer patients to a local leisure centre for a twelve week exercise programme, beginning with ‘a thirty minute consultation with the health and fitness adviser’. They will then ‘be asked to attend at least two sessions a week’ of activities, including ‘low intensity keep fit sessions’, ‘aqua-aerobics and learn-to-swim sessions’, a ‘walking programme’, ‘personal fitness programmes’ and ‘cardiac rehabilitation programmes’. Though the scheme is subsidised, participants are asked to pay between £1 and £2 per session. By 1999 more than 200 such schemes were in operation around the country and were reportedly popular with patients, doctors (and with leisure centres which gained a steady supply of customers during times of low demand).
Industrialization and the practice of medicine: Movement and countermovement 100 mg zudena amex erectile dysfunction consult doctor. Complementary and Alternative Medicine discount zudena 100 mg amex erectile dysfunction weed, Select Committee on Science and Technology [online]. There are more things in medicine and science than are dreamt of in our paradigm, practice and policy! Alternative Therapies: A report on an inquiry by the British Medical Association. Patients’ views on the factors which would influence the use of aromatherapy massage out-patient service. Use of complementary and alternative medicine among primary care patients. Belief in the efficacy of alternative medicine among general practitioners in the Netherlands. Use of alternative treatments in Denmark: Patterns of use and patients experience with treatment effects. Paper presented at the conference: Primary Care Groups and Complementary Medicine: Breaking the Boundaries. Alternative (complementary) medicine: A cuckoo in the nest of empiricist reed warblers. The efficacy of Echinacea compound herbal tea preparation on the severity and duration of upper respiratory and flu symptoms: A randomized, double-blind placebo controlled study. Developing a tool to measure holistic practice: a missing dimension in outcomes measurement within complementary therapies. Managing safety and risk: The experiences of people with Parkinson’s dis- ease who use alternative and complementary therapies. Health: An Interdisciplinary Journal for the Study of Health, Illness and Medicine (forthcoming). Lay assessments of the efficacy of alternative/complementary therapies: A challenge to medical and expert dominance? Lay perspectives on the efficacy of alternative and complementary therapies: The experiences of people living with Parkinson’s disease. Division of Health Studies, Faculty of Health and Community Studies, De Montfort University, Leicester, UK. Managing Stigma via retrospective reinterpretation: An analysis of individual- s’ accounts of why they use alternative therapies. Paper presented at the British Sociological Association Medical Sociology Group and the European Society of Health and Medical Sociology Association Joint Conference. Caring and responsibility: The crossroads between holistic practice and traditional medicine. Overcoming barriers in the use of complementary therapies by persons living with HIV and AIDS. Belief systems and illness experiences: The case of non-medical healing groups. Low back pain of mechanical origin: Randomised comparison of chiropractic and hospital outpatient treatment. Through medical eyes: The medicalization of women’s bodies and women’s lives. Why do patients seek treatment in hospitals of com- plementary medicine? Parental attitude towards alternative medicine in the paediatric intensive care unit. Mohawk College Continuing Education, Fall ’98 (Available from Mohawk College, Fennell Campus, Fennell and West 5th, (905) 385–4295, Hamilton, Ontario, L8N 3T2). Alternative medicine education at medical schools: Are they catching on? Developing research methodology in spiritual healing: Definitions, scope and limitations. Research into complementary and alternative medicine: problems and potential. A survey of acupuncture patients: Results from a questionnaire among a random sample in the general population in Norway.
Chlorophyte 119 Chloroplast WORLD OF MICROBIOLOGY AND IMMUNOLOGY light energy using this pigment 100mg zudena overnight delivery erectile dysfunction pills for heart patients. Chlorophyll absorbs light between the red and blue spectrums and reflects green light buy generic zudena 100mg online erectile dysfunction drug samples, making leaves appear green. Once the light energy is absorbed into the final layer, the intrathylakoid sac, the important process of photosynthesis can begin. Scientists have attempted to discover how chloroplasts convert light energy to the chemical energy stored in organic molecules for a long time. It has only been since the beginning of this century that scientists have begun to understand this process. The following equation is a simple formula for pho- tosynthesis: 6CO 2 + 6H 2O → C 6H 12O 6 + 6O 2. Simply, this means that the chloroplast is able to split water into hydrogen and oxygen. Many questions still remain unanswered about the com- plete process and role of the chloroplast. Based on studies of the evolution of early complex cells, scientists have devised the serial endosymbiosis theory. It is suspected that primitive microbes were able to evolve into more complex microbes by incorporating other photosynthetic microbes into their cellular structures and allowing them to continue functioning as Thin section electron micrograph showing the stacked arrangement of chloroplast membranes. As molecular biology becomes more sophisticated, the origin and genetic makeup of the chloroplast will be more clearly understood. See also Autotrophic bacteria; Blue-green algae; Evolution and evolutionary mechanisms; Evolutionary origin of bacteria See also Photosynthesis and viruses ChloroplastCHLOROPLAST Chromosomes, eukaryoticCHROMOSOMES, EUKARYOTIC Chloroplasts are organelles—specialized parts of a cell that Chromosomes are microscopic units containing organized function in an organ-like fashion. They are found in vascular genetic information, eukaryotic chromosomes are located in plants, mosses, liverworts, and algae. Prokaryotic chromosomes are also present in light is absorbed and converted into fixed chemical energy in one-cell non-nucleated (unicellular microorganisms) prokary- the form of simple sugars synthesized from carbon dioxide otic cells (e. Four layers or zones define the structure In humans, eukaryotic chromosomes are structurally of a chloroplast. The chloroplast is a small lens-shaped made of roughly equal amounts of proteins and DNA. Each organelle that is enclosed by two membranes with a narrow chromosome contains a double-strand DNA molecule, intermembrane space, known as the chloroplast envelope. DNA strands pass out through this double membrane, the first layer of the are comprised of linked nucleotides. Each nucleotide is linked to adjacent which is an area filled with a fluid called stroma. Nucleotides of one DNA strand link to their complementary The third layer is a membrane-like structure of thy- nucleotide on the opposite DNA strand by hydrogen bonds, lakoid sacs. Stacked like poker chips, the thylakoid sacs form thus forming a pair of nucleotides, known as a base pair, or a grana. Thylakoid sacs contain a green pigment called Chromosomes contain the genes, or segments of DNA, chlorophyll. In this region the thylakoid sacs, or grana, absorb that encode for proteins of an individual. Genes contain up to 120 WORLD OF MICROBIOLOGY AND IMMUNOLOGY Chromosomes, eukaryotic thousands of sequences of these base pairs. What distin- sizes and conformations, commonly J- or V-shaped in eukary- guishes one gene from another is the sequence of nucleotides otic cells and ring-shaped in bacteria. Staining reveals a pattern that code for the synthesis of a specific protein or portion of of light and dark bands. Some proteins are necessary for the structure of spond to regional variations in the amounts of the two cells and tissues. Others, like enzymes, a class of active (cat- nucleotide base pairs: Adenine-Thymine (A-T or T-A) in con- alyst) proteins, promote essential biochemical reactions, such trast with amounts of Guanine-Cytosine (G-C or C-G). Some genes produce several cells divide to produce two identical daughter cells. Each slightly different versions of a given protein through a daughter cell has exactly the same number of chromosomes. When a chromosome is structurally faulty, through the replication of the entire set of chromosomes just or if a cell contains an abnormal number of chromosomes, the prior to mitosis. Changes to proteins often result in serious mental and humans: aneuploidy, an abnormal number of chromosomes, physical defects and disease.
The binding of an incoming attractant or repellent mol- See also Bacterial membranes and cell wall; Bacterial surface ecule to a MCP causes the addition or removal of a phosphate layers; Bacterial ultrastructure; Microscope and microscopy group to another molecule that is linked to the MCP on the cytoplasm side discount zudena 100 mg visa impotence psychological treatment. Both events generate a signal that is transmit- ted to other bacterial mechanisms by what is known as a cas- ATTENUATION • see VACCINE cade zudena 100 mg sale impotence doctor. One of the results of the cascade is the control of the rotation of the flagella, so as to propel the bacterium forward or to generate the random tumbling motion. ATTRACTANTS AND REPELLENTS The cascade process is exceedingly complex, with at Attractants and repellents least 50 proteins known to be involved. The proteins are also Attractants and repellents are compounds that stimulate the involved in other sensory events, such as to pH, temperature, directed movement of microorganisms, in particular bacteria, and other environmental stresses. The directed movement The memory of a bacterium for the presence of an in response to the presence of the attractant or repellent com- attractant or repellent is governed by the reversible nature of pound is a feature of a bacterial behavior known as chemotaxis. Overwhelm- The binding of an attractant or a repellent is only for a short ingly, these are nutrients for the bacterium. If the particular compound is abundant in the environ- pounds include sugars, such as maltose, ribose, galactose, and ment, another molecule of the attractant or repellent will bind amino acids such as L-aspartate and L-serine. Examples of repellents include metals that are attractant or repellent is decreasing, then the period between damaging or lethal to a bacterium (e. In the 1880s experiments demonstrated that bacteria corrections in the movement of the bacterium can be made. Further AUTOCLAVE • see STEAM PRESSURE STERILIZER study of the genetic patterns among unrelated family groups with APL suggests that a single genetic defect resulting in APL production may be responsible for several different autoimmune diseases. Current research focuses on finding an AUTOIMMUNITY AND AUTOIMMUNE established APL inheritance pattern, as well as finding the Autoimmunity and autoimmune disordersDISORDERS autoimmune gene responsible for APL production. A number of tests can help diagnose autoimmune dis- Autoimmune diseases are conditions in which a person’s eases; however the principle tool used by physicians is anti- immune system attacks the body’s own cells, causing tissue body testing. Autoimmune diseases are classified as either gen- antibodies found in the blood and determining if they react eral, in which the autoimmune reaction takes place simultane- with specific antigens that would give rise to an autoimmune ously in a number of tissues, or organ specific, in which the reaction. An elevated amount of antibodies indicates that a autoimmune reaction targets a single organ. Elevated antibody lev- accepted as the cause of a wide range of disorders, and is sus- els are also seen in common infections. The anti- common diseases attributed to autoimmune disorders are bodies can also be typed by class. There are five classes of rheumatoid arthritis, systemic lupus erythematosis (lupus), antibodies and they can be separated in the laboratory. The multiple sclerosis, myasthenia gravis, pernicious anemia, and class IgG is usually associated with autoimmune diseases. Unfortunately, IgG class antibodies are also the main class of To further understand autoimmune disorders, it is help- antibody seen in normal immune responses. The antibody tests involve introducing the patient’s antibodies to purpose of the immune system is to defend the body against samples of his or her own tissue—if antibodies bind to the tis- attack by infectious microbes (germs) and foreign objects. Antibodies When the immune system attacks an invader, it is very spe- from a person without an autoimmune disorder would not cific—a particular immune system cell will only recognize react to self tissue. The tissues used most frequently in this and target one type of invader. To function properly, the type of testing are thyroid, stomach, liver, and kidney. For example, if a gland Every cell carries protein markers on its surface that identifies involved in an autoimmune reaction is not producing a hor- it in one of two ways: what kind of cell it is (e. Administration of a hormone, however, will restore These markers are called major histocompatibility complexes the function of the gland damaged by the autoimmune disease. When functioning properly, cells of the immune sys- The other aspect of treatment is controlling the inflammatory tem will not attack any other cell with markers identifying it and proliferative nature of the immune response. Conversely, if the immune system erally accomplished with two types of drugs.
The swing leg then aligns with the stance leg and moves forward so the foot strikes the ground buy zudena 100mg on-line doctor who cures erectile dysfunction, with speciﬁc muscles operating as shock absorbers at heel- strike order zudena 100mg on line erectile dysfunction doctors in colorado springs. Then, normally, the opposite leg enters its swing phase, and the cycle repeats, propelling people forward. Swinging arms, usually moving opposite to the pelvis and leg, aid balance and smooth forward movement. Human anatomy requires us to shift our weight continually during the gait cycle. During the gait cycle, the COM moves rhythmically up-and-down and side-to-side, while transferring weight from one leg to the other. Peo- ple naturally adjust their limb and trunk muscles and walking speeds to minimize COM movements. Abnormalities that increase these distances Sensations of Walking / 25 Figure 2. Quiet standing requires about 25 percent more energy than lying down (Rose, Ralston, and Gamble 1994, 52). At the average, comfortable walking speed of people without impairments (about 80 meters per minute), the body consumes roughly four times the energy used at complete rest (Ker- rigan, Schaufele, and Wen 1998, 168). Walking faster and running demand more energy, but so does walking slowly—for muscles and other struc- tures to provide additional balance. At their respective, comfortable walk- ing speeds, people with and without walking difficulties expend about the same energy during the same amount of time. Therefore, people with mobility problems con- sume more energy while walking the same distance than do others. Efforts to avoid pain typically distort smooth COM movement, increas- ing the energy required to walk a given distance. Keeping joints stiff be- cause of pain requires more energy to swing the limbs forward. Typically, people with hip arthritis avoid bearing weight on their painful joint, re- ducing the stance phase on that side. Lurching their trunk toward the af- fected hip, often by dipping their shoulder on that side, they move the COM over the joint, decreasing stresses on it. During the swing phase, people ﬂex their hip slightly, and they avoid jarring and painful heelstrikes. Abnormalities of nerves or their communication with muscles can im- pair gait, sometimes also by distorting patterns of COM movement. Prob- lems with coordination can cause staggering, lunging gait, with legs placed wider apart than normal. People with strokes involving one side of their brains frequently have a “hemiplegic gait. To walk the same distance, people with hemiplegic gaits consume 37 to 62 percent more en- ergy than those without gait problems (Kerrigan, Schaufele, and Wen 1998, 170). Eventually, many people learn to walk well with pros- theses, artiﬁcial or mechanical legs (Leonard and Meier 1998). People with amputations on one side typically walk faster with prostheses than those with bilateral amputations, whose slower speed demands more energy. Persons with below-the-knee amputations generally ambulate more easily with prostheses than those with amputations above the knee. Maintaining the health of the stump (skin in- tegrity, in particular) is crucial. Walking depends on many important factors beyond lower-extremity functioning, including people’s cognitive status and judgment, vision, other problems affecting balance (such as vestibular or inner ear function), upper-body strength and mobility, global physical endurance and ﬁtness, and overall health. People with mobility difficulties are more likely than others to report vision problems, dizziness, imbalance, and poorer overall health (Table 3). Biomechanical problems, such as worn or inﬂamed knee or hip joints, compressed nerve roots exiting the spine, and collapsed or shifted vertebrae, typically cause pain. Pain can develop slowly and insidi- ously or appear suddenly and relentlessly. It can be all-consuming, keeping people awake at night, preventing even the most trivial-appearing activi- Sensations of Walking / 27 table 3. Other Physical Problems Physical Problem (%)a Mobility Poor Balance Poor Difficulty Vision Dizziness Problem Health None 2 1 1 1 Minor 8 7 10 13 Moderate 12 13 16 28 Major 15 13 26 38 aPoor vision = serious difficulty seeing, even when using glasses or contact lenses; dizziness = dizziness that has lasted for at least 3 months; balance problem = problem with balance that has lasted for at least 3 months; poor health = poor overall health. Stella Richards retired early from her secretarial job when a back problem, spondylolisthesis, laid her out ﬂat for almost six months.
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