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Research question: Why would someone need knee surgery?
There are various reasons as to why knee replacement surgery would be needed.
A very common cause for this procedure is osteoarthritis. Osteoarthritis is caused by the
breakdown of the knee joint. Another cause of knee pain is rheumatoid arthritis.
“Rheumatoid arthritis is an autoimmune disorder in which the immune system attacks the
body’s own tissues (Clayman 870). This disorder causes severe pain and limited motion.
A final reason one might opt for surgery is that he or she had a former knee injury which
led to pain and reduced mobility or movement. Because of this negatively impacted
lifestyle, people may have no option but to undergo knee replacement surgery.
Research question: How can fast food affect your health?
Fast food is extremely unhealthy and can cause multiple diseases. For example,
all of the items from a fast food restaurant are highly processed with additives and a
variety of pesticides, substances used for destroying other organisms. Companies make
the food with many processed ingredients to give it shelf life, which leads to very low
nutritional value. In addition to having virtually no nutrition, fast food is high in calories,
sugar, and sodium. A typical fast food hamburger has 540 calories and 1,040 grams of
sodium (FDA). Not only is the food dangerous, but the packaging is too. The wrappers
are coated with perfluoroalkyl, a chemical that is toxic to humans. Long exposure to this
additive can lead to cancer and tumors. Moreover, fast food “…can contribute to
atherosclerosis, another term for clogged arteries which can increase the risk of heart
attacks” (Diseases You Can Get From Fast Food). In summary, food fast is deadly and
lacks valuable nutrients.
Research question: What make the elephant and the otter unique in their physical
traits?
Southern Sea Otters and African Elephants have very different builds, sizes, and
shapes. Elephants in general are known as the largest terrestrial land animals. On the
other hand, the Southern Sea Otter , known for its thick fur, is only four feet long. The
male usually weighs 50 to 90 pounds, while the female weighs approximately 35 to 60
pounds. An average male African Elephant, being significantly larger than a sea otter,
weighs 12,000 pounds. The average female African Elephant weighs 8,000 to 11,000
pounds. The Southern Sea Otter has dark brown fur, though it gets lighter on the stomach
area. The African Elephant is a similar color, but the color also entails a touch of gray.
The African Elephant can grow to be 11 feet tall, but on average is 8-12 feet for males
and females. Clearly, the Southern Sea Otter and the African Elephant have different
appearances and builds.