Fear to Fail essays

Fear to Fail essays After reading about cancer this is an unfair disease... Each cancer is unique most cancers are named after the part of the body where the cancer first starts. Cancer comprises a group of diseases that have in common abnormal and uncontrolled cell growth. Ways cancer spreads throughout the body: Metastasis of cancer through the Lymphatic system, venous system, direct extension from one organ to another: These are three causing cancer agents. Chemicals capable of producing mutations are both naturally occurring and synthetic, and are found in the environment, food, and water supply, or have been used as drugs (in fact, cancer chemotherapeutic agents are mutagens that exploit the ability to change rapidly replicating DNA preferentially in a tumor, leading to its demise). Radiation often known as "ionizing radiation" induces adjacent thymines in one strand of the DNA helix. The bulges interfere with the activity of replication and transcription enzymes and, therefore, require repair. If the radiation dose is high enough, repair enzymes cannot keep up with the damage, and mutations will accumulate where the dimers have formed, resulting in potentially permanent changes in the DNA. If the mutated cells do not die, they may become transformed and eventually cause canc er. Viruses can inflict damage by inserting themselves into the DNA of an appropriate host cell, also known as its "genome", to cause cancer. These viruses are segments of nucleic acids, DNA or RNA themselves, thought to have "escaped" from normal cellular DNA or RNA. When a DNA virus transforms a cell, it "integrates" itself randomly into the host DNA, and expresses its key genes. Treating Cancer: Surgery about 90% of cancer patients undergoes some kind of surgery. Other methods of treatment are commonly used alongside it. Chemotherapy may be delivered orally, by injection, intravenously, topically (applied to the skin), or by injection into the spinal fluid. ...