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  • venous blood
  • During the phase of normal pressure, the backflow of venous blood and lymph within the large vessels is facilitated. (wikipedia.org)
  • While doing so, it also induces an increase in venous blood return from the body into the right atrium via the superior and inferior venae cavae, and into the right ventricle by increasing the pressure gradient (blood is being pulled by the vacuum from the body and towards the right side of the heart). (wikipedia.org)
  • temperature
  • The main environmental factors of concern in space include but are not limited to the following (Main article: Space Exposure): lack of oxygen extreme pressure and temperature differences higher radiation levels (Main article: Health Threat from Cosmic Rays) There are many detrimental effects of extended exposure to reduced gravity that are similar to aging and disease. (wikipedia.org)
  • Mercury thermostats (circa 1600) using expansion and contraction of columns of mercury in response to temperature changes were used in negative feedback systems to control vents in furnaces, maintaining a steady internal temperature. (wikipedia.org)
  • In audio amplifiers, negative feedback reduces distortion, minimises the effect of manufacturing variations in component parameters, and compensates for changes in characteristics due to temperature change. (wikipedia.org)
  • In organisms, feedback enables various measures (e.g. body temperature, or blood sugar level) to be maintained within a desired range by homeostatic processes. (wikipedia.org)
  • higher
  • Higher than normal pressures were detected and then returned to normal after engineers powered up heaters on the unit. (wikipedia.org)
  • Bender hypothesized that the ancestral ape increasingly avoided deep-water bodies when the risks of being exposed to water were clearly higher than the advantages of crossing them. (wikipedia.org)
  • However, because people are constantly told and shown the cosmetic appeal of weight loss and are warned about the risks of obesity, those who are normal or overweight on the BMI scale have higher risks of poor body image. (wikipedia.org)
  • adult male
  • Most of this sex difference in adult heights is attributable to a later onset of the growth spurt and a slower progression to completion, a direct result of the later rise and lower adult male levels of estradiol. (wikipedia.org)
  • exposure
  • This can be due to any number of factors, including improved nutrition resulting in rapid body growth, increased weight and fat deposition, or exposure to endocrine disruptors such as xenoestrogens, which can at times be due to food consumption or other environmental factors. (wikipedia.org)
  • depends
  • Evoked blood pressure changes can be the result of: releasing leg cuffs that were inflated above systolic pressure breathing at a fixed rate performing a Valsalva maneuver performing squat-stand or sit-stand maneuvers lower body negative pressure pharmaceutical methods to raise or lower blood pressure The quantification depends on the experimental setup and can involve methods such as regression, cross-correlation, transfer function analysis or fitting mathematical models. (wikipedia.org)
  • The conversion of testosterone to estradiol depends on the amount of body fat and estradiol levels in boys are typically much lower than in girls. (wikipedia.org)
  • lung
  • Simultaneously, there is a reduction in blood volume returning from the lungs into the left atrium (the blood wants to stay in the lungs because of the vacuum surrounding the lungs, and PVR is lower because of lung expansion). (wikipedia.org)
  • include
  • Commonplace activities include training Aeronautical Sciences students in aviation medicine, studies to understand how the human body reacts and works in Low-G or Zero-G environments, and engineering and construction of devices and tools to study and improve human activity in space. (wikipedia.org)
  • There are many factors that lead to a person's body image, some of these include: family dynamics, mental illness, biological predispositions and environmental causes for obesity or malnutrition, and cultural expectations (e.g., media and politics). (wikipedia.org)
  • human
  • The phrase body image was first coined by the Austrian neurologist and psychoanalyst Paul Schilder in his book The Image and Appearance of the Human Body (1935). (wikipedia.org)
  • Human society has at all times placed great value on beauty of the human body, but a person's perception of their own body may not correspond to society's standards. (wikipedia.org)
  • oxygen
  • By means of cerebral autoregulation the body is able to deliver sufficient blood containing oxygen and nutrients to the brain tissue for this metabolic need, and remove CO2 and other waste products. (wikipedia.org)
  • The non-invasive measurement of relevant physiological signals like cerebral blood flow, intracranial pressure, blood pressure, CO2 levels, cerebral oxygen consumption, etc. is challenging. (wikipedia.org)
  • control
  • With the aid of normal and low pressure, it should enable to control venous reflux, enhance lymphatic flow and improve blood flow in periphery and muscles. (wikipedia.org)
  • In principle, this is a negative feedback control system that seeks to balance cerebral blood flow to its demand. (wikipedia.org)
  • General negative feedback systems are studied in control systems engineering. (wikipedia.org)
  • Negative feedback as a control technique may be seen in the refinements of the water clock introduced by Ktesibios of Alexandria in the 3rd century BCE. (wikipedia.org)
  • Karl Küpfmüller published papers on a negative-feedback-based automatic gain control system and a feedback system stability criterion in 1928. (wikipedia.org)
  • Cybernetics pioneer Norbert Wiener helped to formalize the concepts of feedback control, defining feedback in general as "the chain of the transmission and return of information", and negative feedback as the case when: The information fed back to the control center tends to oppose the departure of the controlled from the controlling quantity. (wikipedia.org)
  • typically
  • Aside from having low self-esteems, suffers typically fixate on altering their physical appearances. (wikipedia.org)
  • space
  • Also, Gemar set up a model of a scaffold-like truss structure that could be applied to a future space station design in the lower deck. (wikipedia.org)
  • Changes
  • Importantly, the Modelflow aortic age, which reflects age-related changes in the aortic pressure-area relationship, is theoretically not influenced by the ambient blood pressure, because it considers the entire aortic compliance curve in its calculations. (physiology.org)
  • Cerebral autoregulation refers to the physiological mechanisms that maintain blood flow at an appropriate level during changes in blood pressure. (wikipedia.org)
  • The quantification of cerebral autoregulation always involves variation seen in cerebral blood flow in relation to changes in blood pressure. (wikipedia.org)
  • Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction. (wikipedia.org)
  • Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances. (wikipedia.org)
  • systems
  • While most systems of the body show some degree of autoregulation, the brain is very sensitive to over- and underperfusion. (wikipedia.org)
  • Negative feedback is widely used in mechanical and electronic engineering, but it also occurs naturally within living organisms, and can be seen in many other fields from chemistry and economics to physical systems such as the climate. (wikipedia.org)
  • Physical
  • Physical growth-height and weight-accelerates in the first half of puberty and is completed when an adult body has been developed. (wikipedia.org)
  • stable
  • Negative feedback loops in which just the right amount of correction is applied with optimum timing can be very stable, accurate, and responsive. (wikipedia.org)
  • However
  • However, one crewmember experienced a 5-beat run of ventricular tachycardia during a lower-body negative pressure protocol, and another had periods of "wandering supraventricular pacemaker" during rest and following exercise. (wikipedia.org)
  • greater
  • As men faced greater pressures on beauty and perfection, women sported a fuller and plump figure, with fair skin tones becoming more popular. (wikipedia.org)
  • appearance
  • In addition to celebrating and appreciating the body, it also requires an understanding that an individual's appearance does not reflect their character or self-worth. (wikipedia.org)
  • water
  • A decreasing contact with water bodies then could have led to the disaappearance of the doggy paddle instinct. (wikipedia.org)
  • various
  • An individual's impression of their body is also assumed to be a product of ideals cultivated by various social and cultural ideals. (wikipedia.org)
  • levels
  • Instead, P cv decreased below pre-flight supine values and sometimes below upright levels immediately upon insertion to orbit, and remained at these unexpectedly low levels. (biologists.org)
  • Production of progesterone in the ovaries begins with the development of ovulatory cycles in girls (during the lutheal phase of the cycle), before puberty low levels of progesterone are produced in the adrenal glands of both boys and girls. (wikipedia.org)
  • directly
  • N =1) each directly measured central venous pressure ( P cv ) before and during Shuttle launch and insertion to orbit (0 g ). (biologists.org)
  • form
  • A Simple Animation Among the radiata, jellyfish and their kin, the main form of swimming is to flex their cup shaped bodies. (wikipedia.org)
  • found
  • A 2007 report by the American Psychological Association found that a culture-wide sexualization of girls and women was contributing to increased female anxiety associated with body image. (wikipedia.org)
  • Similar findings associated with body image were found by an Australian government Senate Standing Committee report on the sexualization of children in the media. (wikipedia.org)
  • studies
  • The concept of body image is used in a number of disciplines, including psychology, medicine, psychiatry, psychoanalysis, philosophy and cultural and feminist studies. (wikipedia.org)
  • conditions
  • The flow of oxygenized blood within the legs and lower extremities is encouraged and enhanced through the changed conditions of normal and low pressure. (wikipedia.org)
  • In centrifugal governors (1788), negative feedback is used to maintain a near-constant speed of an engine, irrespective of the load or fuel-supply conditions. (wikipedia.org)
  • despite
  • Despite the limited release and low earnings at the box office compared to its budget, Children of Men received critical acclaim and was recognised for its achievements in screenwriting, cinematography, art direction, and innovative single-shot action sequences. (wikipedia.org)
  • back
  • After going through alot of tests they found I have severe muscle and nerve degenation in my lower back. (medhelp.org)
  • I never had any problem with my lower back at all. (medhelp.org)
  • In other words Lower back injuries and muscle and nerve degeneration is a common symptom when the discs are rubbing against each in the presence of injury with the possibility of leading to a more severe injury such muscle and nerve degeneration. (medhelp.org)
  • Back labour is a term for specific pain occurring in the lower back, just above the tailbone, during childbirth. (wikipedia.org)
  • high
  • Some of these elements are only present in high amounts in the diets of meat eaters, and other nutrients like Beta-Carotene and Chlorophyll act as antioxidants and are useful in helping the body get rid of toxins. (nexgenperformance.com)
  • For ultra long range precision target shooting with high-powered rifles and military sniping, radically designed very-low-drag (VLD) bullets are available that are generally produced out of rods of mono-metal alloys on CNC lathes. (wikipedia.org)
  • effect
  • Aside from European contamination in the drink itself, Coca-Cola has a negative effect on the environment throughout the world. (thehomestead.guru)
  • The authors note that "approximately 40% of empirical papers finding a negative effect, 40% finding no effect, and 20% finding a positive effect" but "overall support for the resource curse hypothesis is weak when potential publication bias and method heterogeneity are taken into account. (wikipedia.org)
  • problems
  • I have very soft skin for a man but don't have any problems on any other part of my body. (medhelp.org)
  • The idea that resources might be more of an economic curse than a blessing began to emerge in debates in the 1950s and 1960s about the economic problems of low and middle-income countries. (wikipedia.org)
  • Health
  • A brand new health apply that a lot of observe, drinking water is essential to hydrating The body first thing within the day after an evening extensive speedy. (blogolize.com)
  • everything in t
  • In the case that all is negative maybe you should consider surgery after everything in the case you are young since it can get solved but please make sure to check with few other doctors) Normally surgery happens when the nerve degeneration is so severe that is the only mechanism to try to regenerate the damaged nerve. (medhelp.org)
  • Once
  • When the National Congress is not in session, the Central Committee is the highest body, but since the body meets normally only once a year most duties and responsibilities are vested in the Politburo and its Standing Committee. (wikipedia.org)
  • surface
  • This normal adaptive response to the microgravity environment is, for the most part, of little consequence within the space vehicle per se, but may become a liability resulting in increased risk of an inability or decreased efficiency in crewmember performance of physically demanding tasks during extravehicular activity (EVA) or abrupt transitions to environments of increased gravity (return to Earth, landing on the surface of another planetary body). (wikipedia.org)
  • term
  • The term resource curse was first used by Richard Auty in 1993 to describe how countries rich in mineral resources were unable to use that wealth to boost their economies and how, counter-intuitively, these countries had lower economic growth than countries without an abundance of natural resources. (wikipedia.org)