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Amp Amp Neuromuscular Junction
1,706 words... e effects would lead to a decrease in the safety factor for neuromuscular transmission. The safety factor is the difference between the threshold needed to elicit an action potential, which is usually around - 45 mV and the actual end-plate potential amplitude, which is usually 70 - 80 mV, this is shown in figure 5. As a result of the reduced number of functional A ChR, the skeletal muscle becomes weakened. This weakness has four special characteristics: 1. It generally affects the cranial m...
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Forensic Science Applied To Burned Victims
1,329 wordsCanadian forensic science is an integral component to the overall nature of victim identification. No matter the situation, Canada's forensic scientists are one of the first to arrive on the scene in order to collect pertinent clues for body cataloging. Basic identification is not so difficult a task for the most part, however, when the victim is burned beyond recognition, more complex methods must be utilized as a means by which to establish positive identification. These methods include, DNA f...
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Homo Erectus Homo Habits
613 wordsHomo erectus. Homo erectus (straight walking people) lived in the period from 2 million until 400 thousand years ago. There is a version, that they first appeared in Africa and than gradually spread through the rest of the Ancient World. Eugen Dubois found the first fossils of this specie in the end of XIX century on Java Island (1891 - 1893). In the lower-quarter layers, on the left bank of river Solo (or Bengavan), near Trinil were found a skull, one hip bone and three teeth (picture 1). Since...
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Biological And Cultural Adaptive Radiation Erectus
457 wordsAbout one million years ago, Homo erectus populations began migrating out of East Africa. They soon spread into South and West Africa, Asia and Europe. This adaptive radiation was the result of several biological and cultural factors. H. erectus was physically larger than earlier hominids. This probably allowed them to fun faster and further than their ancestors and could have given them an advantage in hunting and escaping. It may also have increased their food gathering abilities by expanding ...
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Homo Erectus Skeletal System
296 wordsMichael Homo Erectus Homo erectus Michael F. Chapman Jr. Homo erectus was a well-adapted species capable of much more complicated day-to-day tasks. Much of this ability was due to their morphological changes. These changes occurred in the skeletal system and the soft tissues and were tied to environmental factors, tool use, increased meat consumption as well as the more nomadic lifestyle. Changes in the skeletal system included a more robust size with a marked increase in size as compared to ear...
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Cranial Capacity Significant Differences
983 wordsThe Human Brain Through the use of molecular biology it is thought that the hominidae family first appeared about 5 million years ago. Based on this time frame it is believed that an African Hominoid lineage was present shortly before that time, approximately 10 my, which contained the common ancestor to both the chimpanzee and human. The split into proto-chimpanzee and proto-human occurred during the last million years of the Miocene epoch. (Changeux and Chavaillon pg. 61). The fossils, especia...
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Million Years Ago 000 Years Ago
1,149 wordsOur Human Evolution Human Evolution Our farthest believed ancestor is believed to be Australopithecus afarensis. This species, which lived between three and four million years ago, is believed to be the first real hominid because it is the oldest, and most primitive of any definite hominid form thus far found. Evidence from fossilized footprints, as well as pelvic and leg bones, which were similar to modern hominids, led scientists to believe that they could walk upright. Its teeth resembled mor...
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Taking Sides Clashing Sides Clashing Views
2,397 wordsCernovsky, Intelligence And Race Bibliography Cernovsky, Z. Z. (July 1995). On the Similarities of American Blacks and Whites: A Reply to J. P. Rushton. In B. Slife (Ed. ), Taking Sides: Clashing Views on Controversial Psychological Views, 184 - 187. Guilford, CT: Duskin/McGraw-Hill. Ehrlich, P. R. , &# 038; Feldman S. S. (1969). The Race Bomb: Skin Color, Prejudice and Intelligence. New York: The New York Times Book Company. Is There a Racial Difference in Intelligence? Starting with birth, mos...
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Million Years Ago Second Law Of Thermodynamics
2,945 wordsEvolution VS. Creation It has been said that the major difference between humans and beasts is that humans are curious about there beginnings, they question where they came from and how they ended up where they are. There as several theories as to how humans came to exist but none have created such a controversy as the debate between evolutionism and creationism. Evolutionism consists of the idea that all organisms evolved from a single ancestor. According to this theory, the human species close...
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Cranial Capacity Ethnic Groups
1,292 wordsThe debate which I will be delving into in this paper is known by a variety of names, but be it referred to as nature versus nurture or blood versus environment the players on both sides remain the same. Those who believe that human nature is determined by genetics and therefore cannot be changed are usually among the reactionary elite. They tend to be overt racists or a t least predisposed to stereotypes of ethnic groups or classes. They vehemently dispute the opposing view that can be used to ...
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Million Years Ago 5 Million Years
1,716 wordsThe Earliest Hominine's The first undoubted homicide discovered thus far is Ardipithecus radius, which was found in 1994 and is known from 17 fragments of teeth and bone. It dates to approximately 4. 4 million years ago. Thought to be the descendent genus of Ardipithecus is the genus Australopithecus; individuals of this genus were bipeds while on the ground and had ape-like brains and dexterous hands. There are at least six species of Australopithecus: A. anamnesis, A. afarensis, A. aethiopicus...
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