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Science Online Essays


Cannabis
Number of words: 780 | Number of pages: 3

... generally less inhibited. Some users say that it enhances the experiences of music, food and sex. Logical thinking tends to be slowed, but smokers often believe that their minds are flitting from thought to thought with great speed (NIH). Intoxication is more intense during the first hour after smoking, although the drug's effects may persist for three to five hours, depending mainly on the dose. According to " CESAR," regular users often develop a psychological dependence on . They have a strong desire to continue its use, to get through the day. Without the drug, they can feel anxious, or panicky. Some heavy users of experience physical dependence. Their bodies become use to the ...

Humbled By Nature’s Grandeur
Number of words: 689 | Number of pages: 3

... returned at around 9:00pm. Those four hours were probably the best four hours of my adolescent life. When I was out on the kayak I saw so many killer whales it was unbelievable. We were in the midst of two whale pods numbering about 90 whales. I had heard that killer whales can attack people. Surprisingly, I was not afraid except for the fact of how cold the water was. It was so cold that if our kayak capsized both my father and I would have died in about 10 to 15 minutes from exposure to the freezing water. The experience was both frightening and exhilarating. My adrenaline was rushing and my heart was pounding so loud, I could hear it above the roar of the sea. When I was in t ...

David Levinson: Seasons' Of A Man's Life
Number of words: 4195 | Number of pages: 16

... (the men's socio-cultural world, their participation in their world and various aspects of themselves) is the major component in Levinson's theory. The life structure for each person evolves through the developmental stages as people's age. Two key concepts in Levinson's model are the stable period and the transitional period in a person's development. The stable period is the time when a person makes crucial choices in life, builds a life structure around the choices and seeks goals within the structure. The transitional period is the end of a person's stage and the beginning of a new stage. Levinson's model contains five main stages. They are the pre-adulthood stage ...

Multi-regional Continuity: The Fossil Evidence
Number of words: 1080 | Number of pages: 4

... “Archaic” features in skull morphology include thick cranial walls, heavy supraorbital ridges, large teeth, large eye sockets, sloping foreheads, low cranial volume (below 1200 cc.), high prognathism in the area of the lower face, and a small, football-shaped cranium. The presence of various mixtures of these modern and archaic traits forms the basis for identifying a fossil as transitional modern/archaic in accordance with the multi-regional continuity model of human evolution. As an example of transitional fossils found outside of Africa and in accordance with the multi-regional model of human evolution, the remains found in the Ngangdong beds of the Solo River in Indo ...

Internet The Advantages And Disadvantages
Number of words: 2517 | Number of pages: 10

... to be aware of its advantages as well as disadvantages. While seemingly high tech the Internet concept is rather simple. Computers speak to one another and send information. This is accomplished by sending and receiving electronic impulse, and then decoding them into a message. In order to communicate with one another they are linked up in a network. They are then able to access information from thousands of other computers. The network acts like one large computer storing information in various places, rather than in one physical structure. Users tap into the Internet to access or provide information. Internet technology allows one to surf the World Wide Web or send e-mail. The vision o ...

Tundra And The Artic
Number of words: 1345 | Number of pages: 5

... northern pole a lot of the Tundra receives alternating 6 month periods of light and dark. This is also the reason why the Tundra receives cold weather; at it's degree of latitude the suns rays end up hitting the region obliquely, thus causing less solar heat. Here are the temperatures of the Tundra in general: Average January temperature: -32.1 degrees Celsius Average July temperature: +4.1 degrees Celsius Temperature range: 36.2 degrees Celsius Average annual temperature: -17 degrees Celsius Lowest temperature recorded: -52.5 degrees Celsius Highest temperature recorded: +18.3 degrees Celsius After seeing these temperatures you can see the reason why barely anyone lives up there ...

Dementia
Number of words: 4290 | Number of pages: 16

... impairments begin to surface. In the moderate stage, language deficits such as aphasia and apraxia become prominent. Dysfluency, paraphasias, and bizzare word combinations are common midstage speech defects. In the severe stage the patient is gradually reduced to a vegetative state. Speech becomes nonfluent, repetitive, and largely non-communicative. Auditory comprehension is exceedingly limited, with many patients displaying partial or complete mutism. Late in the course of the disease many neuropsychological functions can no longer be measured. Also primitive reflexes such as grasp and suck emerge. Death usually results from a disease such as pneumonia which overwhelms the limite ...

Caffeine 2
Number of words: 413 | Number of pages: 2

... than being broken down. Second among the effects of caffeine is phosphodiesterase inhibition. The phosphodiesterase class of enzymes includes a number of enzymes responsible for breaking down cyclic AMP, thus depriving the body of an energy supply. Caffeine fools phosphodiesterase into attacking it instead, which inhibits the breakdown of cyclic AMP. However, the concentration of caffeine required for this effect to become significant is sufficiently high that the adenosine blocking remains the dominant factor. The other two laboratory effects of caffeine have been judged insignificant in actual biochemical situations. Caffeine can increase the speed of rapid information processing by 1 ...

Awakenings And Tourette Syndro
Number of words: 991 | Number of pages: 4

... in real life) discovers that certain vegetative patients reacted to outside stimuli, such as a pattern on a floor, a tossed ball, or a television with a maladjusted vertical hold. Finally, Dr. Sayer comes across Leonard as a middle-aged man, some thirty years after he was originally afflicted with the disease. After doing some tests, the doctor comes to realize that there is brain activity and convinces his colleagues that further tests should be considered. He theorizes that a newly developed drug, L-Dopa, developed for the treatment of Parkinson's patients may benefit these patients. He doses Leonard, with no initial success. Once again he theorizes that the acid in the Orange Juice, whic ...

The Big Bang Model
Number of words: 1285 | Number of pages: 5

... was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe is the same everywhere on the large scale, at all times.2 It maintains the same average density of matter forever. There are observational evidences found that can prove the Big Bang model is more reasonable than the Steady State model. First, the redshifts of distant galaxies. Redshift is a Doppler effect which states that if a galaxy is moving away, the spectral line of that galaxy observed will have a shift to the red end. The faster the galaxy moves, the more shift it has. If the galaxy is moving closer, the spe ...

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