|
Metabolic Age
Metabolic age is calculated by comparing one's basal metabolic rate to the average of one's chronological age group. All the components in the body require various levels of energy to be maintained. Body fat requires much less energy than lean muscle, as lean muscle is much more metabolically active and therefore requires more energy expenditure to remain in homeostasis. If comparing two individuals, with all variables being equal, the person with more lean muscle mass will have a higher basal metabolic rate, and therefore, a lower metabolic age in comparison to those with the identical chronological age. History The research on which the concept of metabolic age is based began with Alfred Joseph Clark in 1927. Clark found that the pulse rate of different species of animal varied with body size to the power of −0.27. Other researchers went on to find that other biological rates varied to the same, or a similar, coefficient. S. Brody developed a physiological age scale in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basal Metabolic Rate
Basal metabolic rate (BMR) is the rate of food energy, energy expenditure per unit time by endotherm, endothermic animals at rest. It is reported in energy units per unit time ranging from watt (joule/second) to ml O2/min or joule per hour per kg body mass J/(h·kg). Proper measurement requires a strict set of criteria to be met. These criteria include being in a physically and psychologically undisturbed state and being in a Thermal neutral zone, thermally neutral environment while in the post-absorptive state (i.e., not actively digesting food). In Bradymetabolism, bradymetabolic animals, such as fish and reptiles, the equivalent term standard metabolic rate (SMR) applies. It follows the same criteria as BMR, but requires the documentation of the temperature at which the metabolic rate was measured. This makes BMR a variant of standard metabolic rate measurement that excludes the temperature data, a practice that has led to problems in defining "standard" rates of metabolism for ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Age Group
Demographic profiling is a form of demographic analysis used by marketers so that they may be as efficient as possible with advertising products or services and identifying any possible gaps in their marketing strategy. Demographic profiling can even be referred to as a euphemism for industrial espionage. By targeting certain groups who are more likely to be interested in what is being sold, a company can efficiently expend advertising resources so that they may garner the maximum number of sales. This is a more direct tactic than simply advertising on the basis that anyone is a potential consumer of a product; while this may be true, it does not capitalise on the increased returns that more specific marketing will bring. Traditional demographic profiling has been centered around gathering information on large groups of people in order to identify common trends. Trends such as, but not limited to: changes in total population and changes in the composition of the population over a pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fertility And Sterility
The American Society for Reproductive Medicine (ASRM) is a nonprofit, multidisciplinary organization for advancement of the science and practice of reproductive medicine. The society has its headquarters in Washington, D.C and its administrative office in Birmingham, Alabama. History and activities Founded in 1944 by a small group of fertility experts who met in Chicago, the initial name was the American Society for the Study of Sterility, later the American Fertility Society (AFS). Though primarily an American organization, it had members from over 100 countries as of 2020. The society hosts an annual scientific congress, as well as courses, seminars, workshops and publications. Special interest groups are focused on a range of reproductive medicine topics. ASRM has an Ethics Committee that provides guidance on ethical issues. The ASRM Practice Committee issues clinical guidelines and reports. World Health Organization NSA status In May 2014, the ASRM became an associated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Body Fat
Adipose tissue, body fat, or simply fat is a loose connective tissue composed mostly of adipocytes. In addition to adipocytes, adipose tissue contains the stromal vascular fraction (SVF) of cells including preadipocytes, fibroblasts, vascular endothelial cells and a variety of immune cells such as adipose tissue macrophages. Adipose tissue is derived from preadipocytes. Its main role is to store energy in the form of lipids, although it also cushions and insulates the body. Far from being hormonally inert, adipose tissue has, in recent years, been recognized as a major endocrine organ, as it produces hormones such as leptin, estrogen, resistin, and cytokines (especially TNFα). In obesity, adipose tissue is also implicated in the chronic release of pro-inflammatory markers known as adipokines, which are responsible for the development of metabolic syndrome, a constellation of diseases including, but not limited to, type 2 diabetes, cardiovascular disease and atherosclerosis. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lean Muscle
Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. The muscle tissue of a skeletal muscle is striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue layer of fascia. Muscle fibers are formed from the fusion of developmental myoblasts in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homeostasis
In biology, homeostasis (British English, British also homoeostasis) Help:IPA/English, (/hɒmɪə(ʊ)ˈsteɪsɪs/) is the state of steady internal, physics, physical, and chemistry, chemical conditions maintained by organism, living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life. Homeostasis is brought about by a natural resistance to change when already in the optimal conditions, and equilibrium is maintained by many regulatory mechanisms: it is thought to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscle Mass
Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. The muscle tissue of a skeletal muscle is striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue layer of fascia. Muscle fibers are formed from the fusion of developmental myoblasts in a pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Irish Times
''The Irish Times'' is an Irish daily broadsheet newspaper and online digital publication. It launched on 29 March 1859. The editor is Ruadhán Mac Cormaic. It is published every day except Sundays. ''The Irish Times'' is considered a newspaper of record for Ireland. Though formed as a Protestant nationalist paper, within two decades and under new owners it had become the voice of British unionism in Ireland. It is no longer a pro unionist paper; it presents itself politically as "liberal and progressive", as well as being centre-right on economic issues. The editorship of the newspaper from 1859 until 1986 was controlled by the Anglo-Irish Protestant minority, only gaining its first nominal Irish Catholic editor 127 years into its existence. The paper's most prominent columnists include writer and arts commentator Fintan O'Toole and satirist Miriam Lord. The late Taoiseach Garret FitzGerald was once a columnist. Senior international figures, including Tony Blair and Bill Cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Joseph Clark
Professor Alfred Joseph Clark MC FRS FRSE (19 August 1885 – 30 July 1941) was a British pharmacologist and Professor of Pharmacology at the University College, London. He was a de-bunker of fraudulent remedies and did many early studies on the placebo effect of many claimed cures. Life He was born in Glastonbury the son of a Quaker, Francis Joseph Clark of Street, Somerset. He was educated at Bootham School in Yorkshire, and attended the University of Cambridge, graduating with a BA in 1907 and receiving a postgraduate MA in 1910. After the First World War he was employed briefly as Professor of Pharmacology at Cape Town University in South Africa, but used this as a stepping-stone to the more prestigious role of Professor of Pharmacology at University College, London where he worked 1919 to 1926, thereafter taking the role as Professor of Materia Medica at the University of Edinburgh. In 1928 he was elected a Fellow of the Royal Society of Edinburgh, his proposers include ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Kleiber
Max Kleiber (4 January 1893 – 5 January 1976) was a Swiss agricultural biologist, born and educated in Zurich, Switzerland. Kleiber graduated from the as an Agricultural Chemist in 1920, earned the ScD degree in 1924, and became a private '''' after publishing his thesis ''The Energy Concept in the Science of Nutrition''. Kleiber joined the Animal Husbandry Department of |
