Schizophrenia :: essays research papers

Lesson on Schizophrenia   Ã‚  Ã‚  Ã‚  Ã‚  As an overview, schizophrenia is a disease to the brain. It is one of the most disabling and emotionally devastating illnesses known to man. It has been misunderstood for a long time. It has a biological basis, so it is like other diseases. It is a very common disease; one percent to one and a half percent of the U.S. has been diagnosed within some point in their life. There is no cure for this disease, although there is treatable medicine. Schizophrenia is not a multiple personality disorder. People who take medicine for it are able to lead normal fulfilling lives.   Ã‚  Ã‚  Ã‚  Ã‚  There are two ways that schizophrenia begins. One way is called Acute Onset. This happens very fast, about a couple of weeks. It is easier to recover from this. You are able to get help faster because people notice it sooner. The other way is called Process Onset. This takes a longer period of time to show. It is gradual, sometimes up to years. You may say or do strange things every now and then. It could be a long time before you go to the doctor.   Ã‚  Ã‚  Ã‚  Ã‚  There are three main types of delusions a person can have. Delusion of Persecution is when the person thinks that people are out to get him or her. For example the government. Grandeur is when the person thinks he or she is very important, rich, famous, ect. Reference is when the person thinks that the TV is talking directly to him or her. They also think some outside source is talking to them.   Ã‚  Ã‚  Ã‚  Ã‚  Schizophrenia has three main subtypes. Paranoid schizophrenia is when the person believes someone is out to get them. Disorganized schizophrenia is people who do silly strange behaviors, inappropriate emotions, and have messed up speech patterns. They do a thing called a word salad, when they talk with bunches of words randomly thrown together. Catatonic schizophrenia is when the person gets in a position and stays in that exact position for a long time (like hours). This is very and the medication for it is good.   Ã‚  Ã‚  Ã‚  Ã‚  No one knows for sure what causes schizophrenia. The biological explanations are linked to genetic predisposition.

Saladin 6e Chapter 12 Nervous Tissue

Nervous System Set 2 Study online at quizlet. com/_6rnj1 2. What are the classifications of neurons? 3. What are the four types of neuroglia in CNS? 4. What are the two types of fast axonal transport? 5. What are the two types of neuroglia in PNS? 7. What do brain tumors arise from? 8. What do schawnn cells do in PNS? 9. What does the neuroglia or glial cells do? 10. What guides microtubules along axon? 11. What is anaxonic neuron? 12. What is anterograde transport? 13. What is astrocytes? 14. What is axonal transport or axoplasmic flow? 1.What are schwann cells? envelope nerve fibers in PNS. produce a myelin sheath multipolar, bipolar, unipolar and anaxonic oligodendrocytes, ependyal cells, microglia and astocytes Fast anterograde and fast retrograde. Occurs at a rate of 20 to 400 mm/day Schwann cells and satellite cells. masses of rapidly dividing cells. meninges (protective membrane of CNS), Metastasis from nonneuronal tumors in other organs. Often glial cells that are mitotically active throughout life spiral repeatedly around a single nerve fiber. support and protect the neurons.Prevents neurons from touching eachother and gives precision to conduction pathways motor proteins (kinesin and dynein) carry materials â€Å"on their backs† while they â€Å"crawl† along microtubules many dendrites but no axon. Help in visual processes movement away from the soma down the axon maintain structure. â€Å"nerve growth factors† secreted by astrocytes promote neuron growth and synapse formation 0. 5 to 10 mm/day. always anterograde. moves enzymes governs speed of damged nerve fibers. two way passage along an axon 16. What is bipolar neuron? 17. What is dynein? 18. What is pendymal cells? 19. What is fast anterograde transport? 20. What is fast retrograde transport? 21. What is Initial segment? 22. What is Internodes? 23. What is kinesin? 24. What is microglia? 25. What is multipolar neuron? 26. What is myelin sheath? 27. What is myelination? 28. Wh at is neurilemma? 29. What is nodes of Ranvier? 30. What is oligodendrocyes? 31. What is retrograde transport? 32. What is Satellite cells? 33. What is the trigger zone? 34. What is unipolar neuron? one axon and one dendrite. motor proteins in retrograde transport line internal cavities of the brain.Secretes and circulates CSF (cerebrospinal fluid) â€Å"transport† moves mitochondria, synaptic vessicles, other organelles toward the distal end of the axon for recycled material and pathogens – rabies, herpes simplex, tetanus, polio virus. The short section of nerve fiber between the axon hillock and the first glial cell the myelin covered segments from one gap to the next motor proteins in anteograde transport. (supply) â€Å"soldier† small, wondering macophages formed white blood cell called monocytes one axon, multiple dendrites. Most common, most neuron in brain and spinal cord an insulating layer around a nerve fiber. s segmented production of the myelin sheat h. thick outermost coil of myelin sheath. contains nucleus and most of its cytoplasm. gaps between the segments of myelin sheath form myelin sheathes in CNS. forms an insulating layer that speed up signal conduction movement up the axon toward the soma surround neurosoms in ganglia of PNS. provide electrical insulation around soma. Regulate chemical environment of the neuron the axon hillock and initial segment single process leading away from the soma. Sensory from skin and organs to spinal cord 6. What are tumors? 15. what is axonal transport?

Native American Population History And Genetics - 988 Words

The Americas are the most recently human populated continents on the planet, at around 15,000 years before present. The Asian ancestors of Native Americans crossed over a land bridge, connecting Asia to North America, during the earths last glacial maximum in the late Pleistocene (Dennis et al., 2010). Native American population history and genetics are still very new subjects of research and there is still much debate over questions such as: What routes were taken by the migrating Native American peoples? When was the migration? How many migrations occurred? As the genomes of Native Americans are analyzed further, we will gain valuable insight and estimations of when and how the peopling of the Americas took place. As earth’s last continents to be colonized by humans, all skeletal remains found in the Americas are modern Homo sapiens. Modern human dispersal out of Africa across Eurasia began about 50 ka and reached the Americas around 15ka (Goebel, 2008). The last global maximum took place around 20ka when sea level was 60ft lower than present day and the land bridge between Beringia and Tierra del Fuego was exposed. Routes of migration are hard to estimate from genetic data. Archaeological data tells us that humans entered America around the end of the Wisconsin glaciation, 11ka, via an ice-free mid-continental corridor. This model would support a relatively even latitudinal migration southward. An alternative migration route is along the Pacific coasts. This model couldShow MoreRelatedThe Evolution Of Eugenics1721 Words   |  7 PagesFrom evaluating the history that eugenics has imposed, its negative practice has been marked in ways of unrighteous holocaust and genocides worldwide. T he word â€Å"eugenics† has been worldly defined and seen as the destruction of undesirable traits, in all reality people. However, the practice of altering or ridding of specific genes or minority group has changed through the evolution of time. 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