Cancer
.... than benign tissue and
they invade normal tissue. Benign tissue is structured similar to normal tissue
while malignant tissue is abnormal and has an unstructured appearance. Of
greater importance, benign tissue does not metastasize, or begin to grow in
other sites, like malignant tumors do. Cancer always refers to metastasized
tumors but the term tumor is not always necessarily cancer. A tumor is any
living tissue that is distinguishable as abnormal living tissue. After a
cancer forms, it can also ch .....
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Can Genetics Cause Crime?
.... serious crimes. According to an article in Scientific
American, only 12.5 percent of violent crime in the U.S. in 1992 was committed
by females. What is also surprising according to W.W. Gibbs the author of
"Seeking the Criminal Element," in Scientific American,(1995 March) pp 100-107,
is that a very small number of criminals are responsible for the majority of the
violent crime.
Sullivan who is now the president of the Morehouse School of Medicine in
Atlanta wanted to try and address the violence as a p .....
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The Circulatory System
.... is prevented from returning into the
auricle by the tricuspid valve, which completely closes during contraction of
the ventricle. In its passage through the lungs, the blood is oxygenated, that
is, then it is brought back to the heart by the four pulmonary veins, which
enter the left auricle. When this chamber contracts, blood is forced into the
left ventricle and then by ventricular contraction into the aorta. The bicuspid,
or mitral, valve prevents the blood from flowing back into the auricle, and th .....
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Acupuncture
.... Network Nov. 30, 1996).
Acupuncture needles are typically inserted 1/10 to 4/10 on an inch deep.
Although some procedures require needles to be inserted as deep as 10 inches.
Acupuncture points are then stimulated by various forms of needle stimulation.
Acupuncture is an incredibly effective form of medicine; This essay will
present details explaining some of the uses of acupuncture.
Acupuncture; the insertion of needles into the body through specific
spots, over neurorecepters. These .....
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Clinical Chemistry Tests In Medicine
.... blood, it is readily removed through the kidneys and excreted in the
urine. Any disease or condition that reduces glomerular filtration or increases
protein catabolism results in elevated BUN levels.
Creatinine is another indicator of kidney function. Creatinine is a
waste product derived from creatine. It is freely filtered by the glomerulus
and blood levels are useful for estimating glomerular filtration rate. Muscle
tissue contains phosphocreatinine which is converted to creatinine by a
nonenzym .....
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Current Status Of Malaria Vaccinology
.... enters the
bloodstream via the bite of an infected female mosquito. During her feeding she
transmits a small amount of anticoagulant and haploid sporozoites along with
saliva. The sporozoites head directly for the hepatic cells of the liver where
they multiply by asexual fission to produce merozoites. These merozoites can now
travel one of two paths. They can go to infect more hepatic liver cells or they
can attach to and penetrate erytherocytes. When inside the erythrocytes the
plasmodium enlarges into un .....
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Cystic Fibrosis
.... aerosols that relieve constriction of the airways. Physical therapy
Is used to help patients cough up the obstructing mucus. Intestinal obstruction,
Which occurs mostly in infancy, may require surgery.
In 1989, researchers fond the abnormal gene that causes cystic fibrosis.
This gene is located on chromosome 7 . A person who has two cystic fibrosis
Genes has the disease . A person that carries one of the genes does not have the
Genetic disease, but is a carrier.
The symptoms of cystic fibrosis sometim .....
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Development Of The Human Zygote
.... cells, or blastomeres,
are thought to have the potential to form any part of the fetus (Leese, Conaghan,
Martin, and Hardy, April 1993). As the blastomeres continue to divide, a solid
ball of cells develops to form the morula (Fig. 1). The accumulation of fluid
inside the morula, transforms it into a hollow sphere called a blastula, which
implants itself into the inner lining of the uterus, the endometrium (Fig. 1).
The inner mass of the blastula will produce the embryo, while the outer layer of
cell .....
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Diabetes
.... some cases, there are no symptoms, this happens at times with Type II
diabetes. In this case, people can live for months, even years without knowing
they have the disease. This form of diabetes comes on so gradually that symptoms
might not even be recognized.
Diabetes can occur in anyone. However, people who have close relatives
with the disease are somewhat more likely to develop it. The risk of getting
diabetes also increases as people grow older. People who are over 40 and
overweight are more .....
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A Study Of Depression And Relationships
.... functioning. They proposed a
three part hypothesis: 1. A less positive childhood would result in an insecure
attachment style and depression, 2. Depressives would exhibit a preoccupied or
fearful style of attachment, and 3. attachment style would affect relationship
functioning more than depression.
The research was conducted in two independent studies. The first study
sampled 204 college women. Women were studied based on the very plausible
assumptions that women are more susceptible to depre .....
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The Digestive Track
.... the small intestine. The lever
contributes to this digestive process by secreting into the small intestine, a
liquid called bile. The pancreas secretes pancreatic juice which further aids
in dissolving food.
The small intestine undergoes continual muscular contractions called
peristalses. This action pushes food into the large intestine. This surface of
the small intestine has a large number of threadlike projections called villi.
The digested, liquified food is absorbed through the villi, and p .....
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Early To Bed
.... not result in more sleep. Perhaps if one were to wake
up before the rest of the world they would have peace and quiet which would give
them an opportunity to read which could make one more wise, but who can really
learn that early in the morning?
Who exactly is going to become wealthier as a result of going to sleep
earlier and waking up earlier? I think that the average business person would
become less wealthy as a result of going to bed and getting up early. It would
be pointless for a company .....
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Discovering Sicke Cell Anemia
.... affect. Anyone who carries the inherited trait for sickle cell
anemia, but doesn't have the disorder, is actually protected from a severe form
of malaria. This helped the children in countries where malaria was a problem,
to be able to survive against that disease. What happened to those children?
They grew up, had their own children and ended up passing the gene for sickle
cell anemia onto their offspring.
This disease is a hereditary blood disorder that affects the red blood cell.
Red b .....
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FGM: Female Genital Mutilation
.... get fed up with all the side-effects
caused by the practice of FGM. It is every person and community's right to
decide for themselves, without the intervention of outsiders, to decide to do
whatever they want to do to their bodies and minds.
I know, "these women that are being circumcised, aren't freely deciding
on this to be done to them, they don't know any better, they've been
brainwashed". I have two responses to this. The first is, if they have grown
up in this culture all their lives, an .....
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Diseases: Sex Linked And Sex Influenced
.... muscle cells that can
not produce a protein called dystrophins (Science News 380). In patients of
hemophilia, there is a deficiency of a protein needed for blood clotting,
causing this hereditary bleeding disorder. In red/green color blindness, the
broadest form of color blindness that affects six percent of the population, the
cones in the retina that receive green light do not function properly. Unlike
sex linked diseases, sex influenced diseases are not reserved solely for the
male. However, the .....
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