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Björn Folkow
Björn Folkow ( ; 13 October 1921 - 23 July 2012) was a Swedish physiologist. He was professor in physiology at the University of Gothenburg between 1961 and 1987 and a member of the Royal Swedish Academy of Sciences. Biography Björn Folkow was born in Halmstad, Sweden. He studied medicine at Lund University where he continued with doctoral studies in physiology. He defended his thesis on 9 May 1949. Soon thereafter he became associate professor ('laborator') at the new Department of Physiology at the University of Gothenburg. He became full professor in 1961 and remained there until his retirement in 1987. Even after retirement he continued being active in the department until shortly before his death in 2012. Folkow was a member of the Royal Swedish Academy of Sciences and member of the Danish and Russian Academies of Sciences. The European Society of Hypertension established the Björn Folkow Award and Lecture in 1989. Scientific activity Folkow published more than 400 sci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
B Folkow 1991
B, or b, is the second letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''bee'' (pronounced ), plural ''bees''. It represents the voiced bilabial stop in many languages, including English. In some other languages, it is used to represent other bilabial consonants. History The Roman derived from the Greek capital beta via its Etruscan and Cumaean variants. The Greek letter was an adaptation of the Phoenician letter bēt . The Egyptian hieroglyph for the consonant /b/ had been an image of a foot and calf , but bēt (Phoenician for "house") was a modified form of a Proto-Sinaitic glyph adapted from the separate hieroglyph Pr meaning "house". The Hebrew letter bet is a separate development of the Phoenician letter. By Byzantine times, the Greek letter came to be pronounced /v/, so that it is known in modern Greek as ''víta'' (still written ). The C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Bayliss
Sir William Maddock Bayliss (2 May 1860 – 27 August 1924) was an English physiologist. Life He was born in Wednesbury, Staffordshire but shortly thereafter his father, a successful merchant of ornamental ironwork, moved his family to a house he had built on West Heath Road in Hampstead in north London, which he named St Cuthberts. It stood in four acres of gardens. William was his sole heir. He began to study medicine at University College London in 1880, but dropped out when he failed anatomy. Attracted to physiology, he studied under John Burdon Sanderson at Wadham College, Oxford, where he won a first class degree, investigating electrical changes occurring during salivary secretion. He returned to University College London in 1888 as an assistant to Edward Sharpey-Schafer. In 1890 he began to collaborate with Ernest Starling, who was at Guy's Hospital, on the electrical activity of the heart. They complemented each other in many ways: for instance, Bayliss dealt wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2012 Deaths
This is a list of lists of deaths of notable people, organized by year. New deaths articles are added to their respective month (e.g., Deaths in ) and then linked below. 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 Earlier years ''Deaths in years earlier than this can usually be found in the main articles of the years.'' See also * Lists of deaths by day * Deaths by year (category) {{DEFAULTSORT:deaths by year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1921 Births
Events January * January 2 ** The Association football club Cruzeiro Esporte Clube, from Belo Horizonte, is founded as the multi-sports club Palestra Italia by Italian expatriates in First Brazilian Republic, Brazil. ** The Spanish liner ''Santa Isabel'' breaks in two and sinks off Villa Garcia, Mexico, with the loss of 244 of the 300 people on board. * January 16 – The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa. * January 17 – The first recorded public performance of the illusion of "sawing a woman in half" is given by English stage magician P. T. Selbit at the Finsbury Park Empire variety theatre in London. * January 20 – British K-class submarine HMS K5, HMS ''K5'' sinks in the English Channel; all 57 on board are lost. * January 21 – The full-length Silent film, silent comedy drama film ''The Kid (1921 film), The Kid'', written, produced, directed by and starring Charlie Chaplin (in his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swedish Physiologists
Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by the Swedish language * Swedish people or Swedes, persons with a Swedish ancestral or ethnic identity ** A national or citizen of Sweden, see demographics of Sweden ** Culture of Sweden * Swedish cuisine See also * * Swedish Church (other) * Swedish Institute (other) * Swedish invasion (other) * Swedish Open (other) Swedish Open is a tennis tournament. Swedish Open may also refer to: * Swedish Open (badminton) * Swedish Open (table tennis) * Swedish Open (squash) * Swedish Open (darts) {{disambiguation ... {{disambig Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Korner
Paul Ivan Korner AO (18 November 19253 October 2012) was a Czech–Australian cardiac physiologist noted for his contributions to the understanding of hypertension, especially essential hypertension. Early life and education Paul Ivan Korner was born in Moravská Ostrava, Czechoslovakia (Ostrava, Czech Republic) as the older of two sons of Ernst Korner and Edith (née Singer). Korner attended Barker College and the University of Sydney, where he commenced medical studies before taking a break to earn a B.Sc. (1946) and a M.Sc. (1947). He completed his medical education in 1951 and undertook his internship at the Royal Prince Alfred Hospital. During his education and training, he was heavily influenced by Frank Cotton, Hugh Kingsley Ward, and, later, (C.) Ruthven (B.) Blackburn. Career Korner was the Foundation Professor and Head of the School of Physiology and Pharmacology at the University of New South Wales. Korner was a director of the Baker Medical Research Institute in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Action Potential
An action potential (also known as a nerve impulse or "spike" when in a neuron) is a series of quick changes in voltage across a cell membrane. An action potential occurs when the membrane potential of a specific Cell (biology), cell rapidly rises and falls. This depolarization then causes adjacent locations to similarly depolarize. Action potentials occur in several types of Membrane potential#Cell excitability, excitable cells, which include animal cells like neurons and myocyte, muscle cells, as well as some plant cells. Certain endocrine cells such as pancreatic beta cells, and certain cells of the anterior pituitary gland are also excitable cells. In neurons, action potentials play a central role in cell–cell interaction, cell–cell communication by providing for—or with regard to saltatory conduction, assisting—the propagation of signals along the neuron's axon toward axon terminal, synaptic boutons situated at the ends of an axon; these signals can then connect wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synaptic Vesicle
In a neuron, synaptic vesicles (or neurotransmitter vesicles) store various neurotransmitters that are exocytosis, released at the chemical synapse, synapse. The release is regulated by a voltage-dependent calcium channel. Vesicle (biology), Vesicles are essential for propagating nerve impulses between neurons and are constantly recreated by the cell (biology), cell. The area in the axon that holds groups of vesicles is an axon terminal or "terminal bouton". Up to 130 vesicles can be released per bouton over a ten-minute period of stimulation at 0.2 Hz. In the visual cortex of the human brain, synaptic vesicles have an average diameter of 39.5 nanometers (nm) with a standard deviation of 5.1 nm. Structure Synaptic vesicles are relatively simple because only a limited number of proteins fit into a sphere of 40 nm diameter. Purified vesicles have a protein:phospholipid ratio of 1:3 with a lipid composition of 40% phosphatidylcholine, 32% phosphatidylethanola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympathetic Nervous System
The sympathetic nervous system (SNS or SANS, sympathetic autonomic nervous system, to differentiate it from the somatic nervous system) is one of the three divisions of the autonomic nervous system, the others being the parasympathetic nervous system and the enteric nervous system. The enteric nervous system is sometimes considered part of the autonomic nervous system, and sometimes considered an independent system. The autonomic nervous system functions to regulate the body's unconscious actions. The sympathetic nervous system's primary process is to stimulate the body's fight or flight response. It is, however, constantly active at a basic level to maintain homeostasis. The sympathetic nervous system is described as being antagonistic to the parasympathetic nervous system. The latter stimulates the body to "feed and breed" and to (then) "rest-and-digest". The SNS has a major role in various physiological processes such as blood glucose levels, body temperature, cardiac output, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fight-or-flight Response
The fight-or-flight or the fight-flight-freeze-or-fawn (also called hyperarousal or the acute stress response) is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. It was first described by Walter Bradford Cannon in 1915. His theory states that animals react to threats with a general discharge of the sympathetic nervous system, preparing the animal for fighting or fleeing. More specifically, the adrenal medulla produces a hormonal cascade that results in the secretion of catecholamines, especially norepinephrine and epinephrine. The hormones estrogen, testosterone, and cortisol, as well as the neurotransmitters dopamine and serotonin, also affect how organisms react to stress. The hormone osteocalcin might also play a part. This response is recognised as the first stage of the general adaptation syndrome that regulates stress responses among vertebrates and other organisms. Name Originally understood as the "figh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myogenic Mechanism
The myogenic mechanism is how arteries and arterioles react to an increase or decrease of blood pressure to keep the blood flow constant within the blood vessel. Myogenic response refers to a contraction initiated by the myocyte itself instead of an outside occurrence or stimulus such as nerve innervation. Most often observed in (although not necessarily restricted to) smaller resistance arteries, this 'basal' myogenic tone may be useful in the regulation of organ blood flow and peripheral resistance, as it positions a vessel in a preconstricted state that allows other factors to induce additional constriction or dilation to increase or decrease blood flow. The smooth muscle of the blood vessels reacts to the stretching of the muscle by opening ion channels, which cause the muscle to depolarize, leading to muscle contraction. This significantly reduces the volume of blood able to pass through the lumen, which reduces blood flow through the blood vessel. Alternatively when the sm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physiologist
Physiology (; ) is the scientific study of functions and mechanisms in a living system. As a subdiscipline of biology, physiology focuses on how organisms, organ systems, individual organs, cells, and biomolecules carry out chemical and physical functions in a living system. According to the classes of organisms, the field can be divided into medical physiology, animal physiology, plant physiology, cell physiology, and comparative physiology. Central to physiological functioning are biophysical and biochemical processes, homeostatic control mechanisms, and communication between cells. ''Physiological state'' is the condition of normal function. In contrast, '' pathological state'' refers to abnormal conditions, including human diseases. The Nobel Prize in Physiology or Medicine is awarded by the Royal Swedish Academy of Sciences for exceptional scientific achievements in physiology related to the field of medicine. Foundations Because physiology focuses on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
