General Adaption Syndrome- (Stress Response) Three Stages: Consistent way the body reacts to stress; typically involves elevated levels of epinephrine and glucocorticoids Alarm reaction- mediated by norepinephrine from the sympathetic nervous system‚ and epi from the adrenal medulla. They prepare body for flight or fight. Angiotensin and aldosterone levels also increase. Angiotensin raises BP‚ aldosterone promotes sodium and H2O conservation‚ which helps offset possible losses by sweating and bleeding
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Evolutionary (Darwinian) Medicine “Nothing in biology makes sense except in the light of evolution” –Theodosius Dobzhansky Proximate vs. Ultimate Questions Biological causation: proximate vs. ultimate explanations Physiology‚ genetics‚ biochemistry‚ etc. generally concentrate on * proximate causation “What” & “How” questions Ultimate causation: How evolutionary processes (natural selection; adaptation) and evolutionary history shape traits “Why” questions Traits have both types
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Evolutionary psychologists view human behavior and psychological traits as a result of evolutionary adaptation in response to reproductive needs – much like the concept of natural selection applied to reproduction‚ or sexual selection. Drawing from this perspective‚ evolutionary psychologists and professionals seek to explain the differences between male and female dating and mating rituals and sexual attitudes and how they have evolved throughout the centuries. For example‚ researchers employ the
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16.1 All of Life is connected through its Evolutionary history Phylogeny- is the history of descent of organisms from their common ancestor. Groups of evolutionarily related species are represented as related branches in a PHYLOGENETIC TREE. - A group of species that consists of a common ancestor and all its evolutionary descendants is called a CLADE. Named clades and species are called TAXA. - HOMOLOGIES are similar traits that have been inherited from a common ancestor. - A trait that is shared
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unique. The concept of evolutionary psychology explains that human behavior is largely influenced by their evolutionary ancestors through six theories and methods. Evolutionary psychology proposes that a lot of human behavior can be explained by the change of the physical and social environments through time. It argues that “much of human behavior is the output of psychological adaptations that evolved to solve recurrent problems in human ancestral environments.” (Evolutionary Psychology) The goals
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BIO101 March 11‚2013 Physiological Adaptation of Fish to Its Environment All organisms around the world are sparsely distributed depending on the environment that best suited to their modes of survival. Organisms undergo adaptation – an evolutionary process where they became well-suited to a particular. The process of adaptation happens through the natural selection‚ whereby nature selects those organisms that suit a certain habitat and sustain them for successive generation and ones that
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Why is an understanding of evolutionary and population processes important for species conservation? Abstract Evolution is it a theory of previous life becoming more like present life over time through means such as "natural selection" With an endless diversity of life‚ and variation as a result of the interactions of organisms with their environments. Fundamental to the process of understanding how evolution works is to look at a combination of many mechanisms such as genetic variation‚
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Throughout the course of life evolution has taken its place on plants and animals. One of the greatest evolutionary changes was the transition of life in water‚ to the transition to life on land. As you can imagine‚ both organisms had challenges moving from this single cellular water environment to a multi-cellular land environment. While the change was difficult‚ this new environment would help organisms flourish in life‚ giving them the ability to reproduce more freely‚ and eat with less competition
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EVOLUTIONARY THEORY Evolution is the process in which significant changes in the inheritable traits (genetic makeup) of a species occur over time. The validity and value of evolutionary biology are based on continual analysis and interpretation of accumulating science data. THEORIES OF ORGANIC EVOLUTION • Historically three theories • The views of most modern biologists combine the second and third • No evidence of the first theory‚ that of Lamarck LAMARCK: Inherited Acquired Characteristics
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Film adaption “The Kite Runner” is a movie that has been adapted from the novel written by Khaled Hosseini. According to the past‚ certain characters and events of the films that had been based on the novels have been left out. Unexpectedly‚ there are merits in this film that should be acknowledged. The movie follows the story quite closely through those points‚ and telling the story adequately. They are the additions to the screenplay‚ the sensory experience and the narration respectively
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