Linking Brain and Behavior: Reflections on Neurodegenerative Diseases and Fetal Neural Transplantat :: Biology Essays Research Papers

Linking Brain and Behavior: Reflections on Neurodegenerative Diseases and Fetal Neural Transplantation Neurodegenerative diseases are caused by malfunctions within the motor sector of the nervous system. These malfunctions, which are caused by the presence or absence of hormones, are a direct result of neural cell deterioration within the brain. Thus, biological problems of the brain, or rather predicaments arising between cellular connections within the brain, and the treatment of such conditions, illustrate how the brain organizes movement and behavior (11). The brain is the body's communication headquarters. It obtains a myriad of information from various parts of the sensory system and processes this information in an organized fashion. It then relays sensory input to different parts of the motor system. Such messages from the brain dictate specific muscular and behavioral patterns. Thus, this neural system is highly depended on a cause and effect system, where the slightest offset to the assembly-line fashion of cellular interaction results in major behavioral abnormalities(11). Moreover, there are two particular areas of the brain that are specifically related to motor malfunctions: the substania nigra and the striatum (the caudate nucleus and the putamen). The cells of the nigra synapse with cells of the striatum, which serves as the controller of motor functions such as walking, balance, and muscular movement. Information from the nigra cells passes through the synapses with the aid of a specific hormone, dopamine, which is a signi ficant chemical transmitter in the brain. Because the existence of dopamine is essential to the function of the substania nigra, it is also essential for the various muscular activities controlled by the striatum, such as walking, balance, etc (9). Neurodegenerative diseases, like Parkinson's Disease and Huntington's disease, thus, illustrate two very different behavioral patterns that are subsequently caused by two opposite and extreme biological abnormalities, where the nigra-striatum neural communication assemblage is hampered. Parkinson's disease (PD) results from a depletion in the amount of dopamine produced by the brain. At the onset of the disease, dopamine-secreting cells of the substania nigra, either because of genetic factors or environmental toxins, experience mass cell death. Thus, the nigra cells are unable to form synapses through which they secrete and relay dopamine to the striatum in a neural circuit within the basal ganglia (11). The striatum is also a coordination center for chemical messengers. When there is a decrease in dopamine levels, the striatum experiences a chemical imbalance (2). Linking Brain and Behavior: Reflections on Neurodegenerative Diseases and Fetal Neural Transplantat :: Biology Essays Research Papers Linking Brain and Behavior: Reflections on Neurodegenerative Diseases and Fetal Neural Transplantation Neurodegenerative diseases are caused by malfunctions within the motor sector of the nervous system. These malfunctions, which are caused by the presence or absence of hormones, are a direct result of neural cell deterioration within the brain. Thus, biological problems of the brain, or rather predicaments arising between cellular connections within the brain, and the treatment of such conditions, illustrate how the brain organizes movement and behavior (11). The brain is the body's communication headquarters. It obtains a myriad of information from various parts of the sensory system and processes this information in an organized fashion. It then relays sensory input to different parts of the motor system. Such messages from the brain dictate specific muscular and behavioral patterns. Thus, this neural system is highly depended on a cause and effect system, where the slightest offset to the assembly-line fashion of cellular interaction results in major behavioral abnormalities(11). Moreover, there are two particular areas of the brain that are specifically related to motor malfunctions: the substania nigra and the striatum (the caudate nucleus and the putamen). The cells of the nigra synapse with cells of the striatum, which serves as the controller of motor functions such as walking, balance, and muscular movement. Information from the nigra cells passes through the synapses with the aid of a specific hormone, dopamine, which is a signi ficant chemical transmitter in the brain. Because the existence of dopamine is essential to the function of the substania nigra, it is also essential for the various muscular activities controlled by the striatum, such as walking, balance, etc (9). Neurodegenerative diseases, like Parkinson's Disease and Huntington's disease, thus, illustrate two very different behavioral patterns that are subsequently caused by two opposite and extreme biological abnormalities, where the nigra-striatum neural communication assemblage is hampered. Parkinson's disease (PD) results from a depletion in the amount of dopamine produced by the brain. At the onset of the disease, dopamine-secreting cells of the substania nigra, either because of genetic factors or environmental toxins, experience mass cell death. Thus, the nigra cells are unable to form synapses through which they secrete and relay dopamine to the striatum in a neural circuit within the basal ganglia (11). The striatum is also a coordination center for chemical messengers. When there is a decrease in dopamine levels, the striatum experiences a chemical imbalance (2).

Mexican Drug Cartels Essay

Several drug cartels are involved, such as: Sinaloa Cartel, Gulf Cartel, Juarez Cartel, Knights Templar Cartel, Tijuana Cartel, La Familia Cartel (disbanded), Los Zetas, Beltran-Leyva Cartel (disbanded), Jalisco New Generation Cartel, Independent Cartel of Acapulco, La Barredora. You could see them all as the bad guys. On the other team are the Mexican forces, consisting of the Army, Navy, Air force, the Federal police and other Mexican forces What are the sources of the conflict? What is it about? The main source of the conflict is power. All of the cartels wanted more power and money and they started fighting each other because of this. Another major cause of the conflict are the drug trafficking routes used by different cartels, the cartels want more power over each other’s routes. Relationships between/among conflicting parties? They were once all together in one massive cartel. But because of the decision of the leader of the cartel the ‘mother-cartel’ split up in many smaller cartels (See Dimension #1). What is the history of the conflict? The birth of all Mexican drug cartels is traced to former Mexican Judicial Federal Police agent Miguel Angel Felix Gallardo (â€Å"The Godfather†), who founded the Guadalajara Cartel in 1980 and controlled all illegal drug trade in Mexico and the trafficking corridors across the Mexico-USA border throughout the 1980s. He started off by smuggling marijuana and opium into the U. S. A. , and was the first Mexican drug chief to link up with Colombia’s cocaine cartels in the 1980s. Through his connections, Felix Gallardo became the point man for the Medellin cartel, which was run by Pablo Escobar. This was easily accomplished because Felix Gallardo had already established an infrastructure that stood ready to serve the Colombia-based traffickers. There were no cartels at that time in Mexico. Felix Gallardo was the lord of Mexican drug smugglers. He oversaw all operations; there was just him, his cronies, and the politicians who sold him protection. [59] However, the Guadalajara Cartel suffered a major blow in 1985 when the group’s co-founder Rafael Caro Quintero was captured, and later convicted, for the murder of DEA agent Enrique Camarena. 60][61] Felix Gallardo afterwards kept a low profile and in 1987 he moved with his family to Guadalajara. According to Peter Dale Scott, the Guadalajara Cartel prospered largely because it enjoyed the protection of the Direccion Federal de Seguridad (DFS), under its chief Miguel Nazar Haro, a CIA asset. â€Å"The Godfather† then decided to divide up the trade he controlled as it would be more efficient and less likely to be brought down in one law enforcement swoop. 63] In a way, he was privatizing the Mexican drug business while sending it back underground, to be run by bosses who were less well known or not yet known by the DEA. Gallardo convened the nation’s top drug traffickers at a house in the resort of Acapulco where he designated the plazas or territories. The process: how do we choose to deal with the conflict? We do not personally deal with this conflict. However, the US army helps the Mexican government at some points, since most of the drugs comes in via Mexico.

Essay on Eiffel Tower Essay

In 1889, Paris hosted an Exposition Universelle to mark the 100-year anniversary of the French Revolution. More than 100 artists submitted competing plans for a monument to be built on the Champ-de-Mars, located in central Paris, and serve as the exposition’s entrance. The commission was granted to Eiffel et Compagnie. Eiffel, an architect and metal expert, receives full credit for the monument that bears his name but it was one of his employees—a structural engineer named Maurice Koechlin—who came up with the concept. Several years earlier, the pair had collaborated on the Statue of Liberty’s metal armature. Originally intended as a temporary exhibit, the Eiffel Tower was almost torn down in 1909. City officials opted to save it after recognizing its value as a radiotelegraph station. Several years later, during World War I, the Eiffel Tower intercepted enemy radio communications. It escaped destruction a second time during World War II. Over the years, the Eiffel Tower has been the site of numerous high-profile stunts, ceremonial events and even scientific experiments. The Eiffel Tower has also inspired more than 30 replicas and similar structures in various cities around the world. Now one of the most recognizable structures on the planet, the Eiffel Tower underwent a major renovation in 1986 and is repainted every seven years. It welcomes more visitors than any other paid monument in the world—an estimated 7 million people per year. Fulgence Bienvenà ¼e, an engineer at Ponts et Chaussà ©es, created the project, which was adopted by the Municipal Council on 9 July 1897. Work started on 4 October 1898. Line 1, which opened on 19 July 1900, connected the Porte de Maillot to the Porte de Vincennes and provided a service to the summer Olympic Games organised in the Bois de Vincennes. Parisians immediately loved this new means of transport. In 1901, Fulgence Bienvenà ¼e planned an additional network of lines which would not leave any point in Paris more than 500 metres from a metro station. Work quickly began on lines 2 and 3 and then 4 and 5, etc. The first six lines were opened to the public in 1910. Immediately prior to the First World War, the 91km-long network included 10 lines and carried 467 million travellers. The following decade saw the network continue to grow, in particular through the extension of the lines to the suburbs (lines 1, 12, 9, 11, etc.). During the Second World War, several lines were exten ded despite the shortage of electricity.

Material Culture - Artifacts and their Meaning(s)

Material Culture - Artifacts and their Meaning(s) Material culture is a term used in archaeology and other anthropology-related fields to refer to all the corporeal, tangible objects that are created, used, kept and left behind by past and present cultures. Material culture refers to objects that are used, lived in, displayed and experienced; and the terms includes all the things people make, including tools, pottery, houses, furniture, buttons, roads, even the cities themselves. An archaeologist thus can be defined as a person who studies the material culture of a past society: but theyre not the only ones who do that. Material Culture: Key Takeaways Material culture refers to the corporeal, tangible objects created, used, kept, and left behind by people.A term used by archaeologists and other anthropologists.One focus is the meaning of the objects: how we use them, how we treat them, what they say about us.Some objects reflect family history, status, gender, and/or ethnic identity.  People have been making and saving objects for 2.5 million years.  There is some evidence that our cousins the orangutans do the same.   Material Culture Studies Material culture studies, however, focus not just on the artifacts themselves, but rather the meaning of those objects to people. One of the features that characterize humans apart from other species is the extent to which we interact with objects, whether they are used or traded, whether they are curated or discarded. Objects in human life can become integrated into social relationships: for example, strong emotional attachments are found between people and material culture that is connected to ancestors. Grandmothers sideboard, a teapot handed down from family member to family member, a class ring from the 1920s, these are the things that turn up in the long-established television program Antiques Roadshow, often accompanied by family history and a vow to never let them be sold. Recalling the Past, Constructing an Identity Such objects transmit culture with them, creating and reinforcing cultural norms: this kind of object needs tending, this does not. Girl Scout badges, fraternity pins, even Fitbit watches are symbolic storage devices, symbols of social identity that may persist through multiple generations. In this manner, they can also be teaching tools: this is how we were in the past, this is how we need to behave in the present. Objects can also recall past events: antlers collected on a hunting trip, a necklace of beads obtained on holiday or at a fair, a picture book that reminds the owner of a trip, all of these objects contain a meaning to their owners, apart from and perhaps above their materiality. Gifts are set in patterned displays (comparable in some respects to shrines) in homes as markers of memory. Even if the objects themselves are considered ugly by their owners, theyre kept because they keep alive the memory of families and individuals that might otherwise be forgotten. Those objects leave traces, that have established narratives associated with them. Ancient Symbolism All of these ideas, all of these ways that humans interact with objects today have ancient roots. Weve been collecting and venerating objects since we started making tools 2.5 million years ago, and archaeologists and paleontologists are today agreed that the objects that were collected in the past contain intimate information about the cultures that collected them. Today, the debates center on how to access that information, and to what extent that is even possible. Interestingly, there is increasing evidence that material culture is a primate thing: tool use and collecting behavior have been identified in chimpanzee and orangutan groups. Changes in the Study of Material Culture The symbolic aspects of material culture have been studied by archaeologists since the late 1970s. Archaeologists have always identified cultural groups by the stuff they collected and used, such as house construction methods; pottery styles; bone, stone and metal tools; and recurring symbols painted on objects and sewn into textiles. But it wasnt until the late 1970s that archaeologists began to actively think about the human-cultural material relationship. They began to ask: does the simple description of material culture traits sufficiently define cultural groups, or should we leverage what we know and understand about the social relationships of artifacts to get to a better understanding of the ancient cultures? What kicked that off was a recognition that groups of people who share material culture may not ever have spoken the same language, or shared the same religious or secular customs, or interacted with one another in any other way other than to exchange material goods. Are collections of artifact traits just an archaeological construct with no reality? But the artifacts that make up material culture were meaningfully constituted and actively manipulated to attain certain ends, such as establishing status, contesting power, marking an ethnic identity, defining the individual self or demonstrating gender. Material culture both reflects society and is involved in its constitution and transformation. Creating, exchanging and consuming objects are necessary parts of displaying, negotiating and enhancing a particular public self. Objects can be seen as the blank slates upon which we project our needs, desires, ideas and values. As such, material culture contains a wealth of information about who we are, who we want to be. Sources Berger, Arthur Asa. Reading matter: Multidisciplinary perspectives on material culture. New York: Routledge, 2017.Coward, Fiona, and Clive Gamble. Big Brains, Small Worlds: Material Culture and the Evolution of the Mind. Philosophical Transactions of the Royal Society of London B: Biological Sciences 363.1499 (2008): 1969-79. Print.Gonzlez-Ruibal, Alfredo, Almudena Hernando, and Gustavo Politis. Ontology of the Self and Material Culture: Arrow-Making among the Aw Hunter-Gatherers (Brazil). Journal of Anthropological Archaeology 30.1 (2011): 1-16. Print.Hodder, Ian. Symbols in Action: Ethnoarchaeological Studies of Material Culture. Cambridge: Cambridge University Press, 1982. Print.Money, Annemarie. Material Culture and the Living Room: The Appropriation and Use of Goods in Everyday Life. Journal of Consumer Culture 7.3 (2007): 355-77. Print.OToole, Paddy, and Prisca Were. Observing Places: Using Space and Material Culture in Qualitative Research. Qualitative Research 8.5 (2008): 616 -34. Print. Tehrani, Jamshid J., and Felix Riede. Towards an Archaeology of Pedagogy: Learning, Teaching and the Generation of Material Culture Traditions. World Archaeology 40.3 (2008): 316-31. Print.van Schaik, Carel P., et al. Orangutan Cultures and the Evolution of Material Culture. Science 299.5603 (2003): 102-05. Print.

Tips For Fighting Addiction In College

Tips For Fighting Addiction In College Mental Health Issues: Addiction in the Campus Partying hard and abusing addictive substances often accompanies the life of a college student. A lot of students start to lead a more conscious way of life after some years of such lifestyle or after graduating from the university. Unfortunately, for some students, it becomes a huge burden that turns into addiction. Addiction is defined as repeated abuse of a certain substance, which is characterized by continuity and obtrusiveness. According to the National Institute on Alcohol Abuse and Alcoholism:Around 80% of students who study in the college drink alcohol Near 50% of those students are binge drinkers 1,825 students die from injuries related to alcohol Assaults, sexual abuses, and aggressive behavior more frequently come from those whos been drinking Around 25% of those who have developed a regular drinking habit have academic problemsWith alarming stats like these, it becomes evident that addiction is an important issue and needs an urgent solution. Symptoms Of Addiction Students who became dependent on alcohol and drugs usually have the following symptoms:Being paranoid, anxious, stressed, or fearful for no reason Getting into troubles, fights, and conflicts Having impaired coordination and bloodshot eyes Needing to use more and more alcohol or drugs to get the same effects Negative change in the grooming habits and physical appearanceIf you experience some of the symptoms listed above, you may be addicted. If you notice that you are using alcohol or drugs in order to numb your negative emotions, you should contact the health center on your campus and consult a qualified specialist. Addictions need to be taken very seriously. Recognizing The Signs Of Addiction It may be difficult to differentiate when ones use of alcohol has turned from occasional to habitual. Besides, those who cant admit that they have an addiction will use all possible arguments to ensure you that theyre totally in control of their alcohol consumption. To understand if your friend has developed the destructive addiction, ask yourself the following list of questions:Is your friend drinking in order to drown his sorrow or for recreational reasons? Has their drinking or drug use influenced their relationships in a negative way? Have drugs and alcohol become one of the central themes of your friends life? Are there negative changes in their personality connected with drugs and alcohol consumption? Have you noticed some strange, unpleasant smell from their clothing, body, or breath? Do they feel uncomfortable or anxious when they cant get access to drugs or alcohol? Have any of the blood relatives of your friends had alcohol addiction? Have they ever lost the memory of the previous evening?It often happens that addicts dont want to confess that they have an addiction; therefore it is very important to observe their behavior and notice the alarming symptoms. If they receive a proper treatment in the earlier stages, they have a good chance of getting their conscious life back. If you want to warn your friend about the problem he or she has with addiction, find the time when they are sober and tell them that you have noticed some worrying changes about their behavior. Dont be judgmental, let your friend understand that you are concerned about their health, and explain the reason behind your concerns. Offer your help in solving the issues of addiction you can consult an online resource or go to your student health center with your friend. Resources To Help Treat Addiction Consult these resources to find out more about addiction and get help:National Institute for Drug Abuse Narcotics Anonymous Alcoholics Anonymous National Council on Alcoholism and Drug Dependence Substance Abuse and Mental Health Service Administration Your Student Health CenterAddiction can turn into a serious problem if its not treated timely and correctly. Please, be very attentive to the addictive substances that you are using and never turn their use from recreational to habitual. Better stop using alcohol or drugs to relax. Consider such relaxation techniques as meditation and yoga that have a much more constructive influence on your body and mind.

Dipole Moment Definition

Dipole Moment Definition A dipole moment is a measurement of the separation of two opposite electrical  charges. Dipole moments are a vector quantity. The magnitude is equal to the charge multiplied by the distance between the charges and the direction is from negative charge to positive charge: ÃŽ ¼ q  · r where ÃŽ ¼ is the dipole moment, q is the magnitude of the separated charge, and r is the distance between the charges. Dipole moments are measured in the SI units of coulomb ·meters (C m), but because the charges tend to be very small in magnitude, the historical unit for a dipole moment is the Debye. One Debye is approximately 3.33 x 10-30 C ·m. A typical dipole moment for a molecule is about 1 D. Significance of the Dipole Moment In chemistry, dipole moments are applied to the distribution of electrons between  two bonded atoms. The existence of a dipole moment is the difference between polar and nonpolar bonds. Molecules with a net dipole moment are polar molecules. If the net dipole moment is zero or very, very small, the bond and molecule are considered to be nonpolar. Atoms that have similar electronegativity values tend to form chemical bonds with a very small dipole moment. Example Dipole Moment Values The dipole moment is dependent on temperature, so tables that list the values should state the temperature. At 25 °C, the dipole moment of cyclohexane is 0. It is 1.5 for chloroform and 4.1 for dimethyl sulfoxide. Calculating the Dipole Moment of Water Using a water molecule (H2O), its possible to calculate the magnitude and direction of the dipole moment. By comparing the electronegativity values of hydrogen and oxygen, there is a difference of 1.2e for each hydrogen-oxygen chemical bond. Oxygen has a higher electronegativity than hydrogen, so it exerts a stronger attraction on the electrons shared by the atoms. Also, oxygen has two lone electron pairs. So, you know the dipole moment must point toward the oxygen atoms. The dipole moment is calculated by multiplying the distance between the hydrogen and oxygen atoms by the difference in their charge. Then, the angle between the atoms is used to find the net dipole moment. The angle formed by a water molecule is known to be 104.5 ° and the bond moment of the O-H bond is -1.5D. ÃŽ ¼ 2(1.5)cos(104.5 °/2) 1.84 D

Compare and contrast Essay Example | Topics and Well Written Essays - 750 words - 1

Compare and contrast - Essay Example Neal Caffrey is the star of the show who was a conman. He was a thief and forger for three years and knew all the tricks of the trade but then he got caught by the FBI. He was sentenced to four years in prison and his tenure was about to end in jail when he escaped the prison under maximum security and he found his girlfriend Kate. The agent who caught him was Peter Burke, caught him again and returned him to the prison. Caffrey actually tries to help Burke out this time; he is willing to give him evidence on another case but only if he meets with Caffrey in which he proposed that he would actually help Burke catch other criminals since he would know their tricks better and he would be released from prison on a work basis. Burke hesitates to accept this proposal however he ends up agreeing. This partnership starts the show with Caffrey promising to not escape his deal and help catch white collar criminals and they end up doing so successfully in many cases. ‘Suits’ is al so a US based television series that is now on its third season. It involves Mike Ross as its main character. Ross is a brilliant character who was aiming to be an attorney and this dream was crushed when he was expelled and had to drop out of college. He had a keen intelligence and a photographic memory and so even as a dropout he could help others; he did this by taking the Law School Admission Test (LSAT) for others. Therefore both Caffrey and Ross had an intelligent mind and a flair for doing the wrong thing and they need to make a living as well. Ross had to take care of his grandmother who he places in a nursing home and then he also agrees to transport marijuana for a friend of his; not just anyone but his best friend in the show who is Trevor. At the same time, Harvey Specter, who a top corporate lawyer in New York is promoted in a firm called Pearson Hardman law firm. He needs to take on an associate attorney and Ross accidentally sits for an interview for the post. This ho wever turns to be in his favor for two reasons. Firstly, the marijuana task turns out to be a sting operation designed to catch criminals. And secondly Specter is so impressed by Ross that he hires him despite knowledge of his dropping out. He likes him due to his wittiness, his knowledge and his desire. Only Specter’s attorney knows that Ross is a dropout but to the world, he has graduated from Harvard with a law degree. Both Ross and Caffrey are persuasive enough to be hired and convince men of great position and power to be on their side and keep their secret at the same time. However, at Specter’s firm, his partner and who is jealous of Specter isn’t convinced with Mike’s degree credentials and Ross faces not only those issues but the fact that his friend is a drug dealer and that keeps him linked to his past which was a failure. He is also confused about whom he loves by first dating his best friend’s ex-girlfriend and then a colleague Rachel Zane, and so his personality seems to be more complicated. And his complication catches up to him when his best friend returns and seeing that he is dating his ex-girlfriend, he tells on him regarding his credentials to his firm. He loses Jenny eventually as well due to his feelings for Rachel and things seem to be going berserk with him at work with accusations of also hiding evidence as well. His personal life seems to be displayed more than Caffreys’