melanocytes is roughly equivalent for all people; however the level of melanin inside each melanosome and the number of melanosomes inside a melanocyte varies. The total amount of melanin is what determines the range of hair‚ eye and skin colors. Ultraviolet solar radiation causes malignant changes in the skin by having direct mutagenic effects on DNA‚ damaging DNA and suppressing apoptosis (programmed cell death). Melanocytes
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1. Introduction The big question the book will attempt to answer is: Why would genes that make people sick still be in our gene pool after millions of years? 2. Chapters I-VIII Chapter I A. The author chose to name chapter I “Ironing it Out” because the whole chapter is about why iron is so high in some people‚ but low in others. The author is trying to iron it out! B. An example of Dr. Moalem illustrating the AP Biology theme of evolution when she tells us about how during
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Cancer is a scary thing. With cancer being the number two killer in the United States‚ most-likely we all know someone who is fight or has fought the frightening battle with cancer. There are over 100 types of known cancer‚ and though there are many successful treatments‚ there is no cure for this deadly disease. Some of the most common cancers include; breast‚ pancreatic‚ colon‚ leukemia‚ skin‚ and plenty more. Skin cancer is a cancer that could easily be detected soon‚ with check-ups and self-examinations
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use point by point comparisons to reach a conclusion whether fingerprints are the same. 5. How are fingerprints discovered at crime scenes? usually it is easy to be seen on items like plastic prints‚ however scientist are using a reflected ultraviolet imaging system to aim uv light where fingerprints might be‚ and if there a fingerprint will reflect the light back. 6. Of the three types of physical evidence discussed in this module‚ which one do you think you would be most interested
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ingredients like nicotine in cigarettes which destroy pulmonary alveoli. Even people who don’t smoke can inhale second hand smoke every day. If a person inhale or is inhaled smoke for a long time‚ he/she probably get emphysema‚ COPD even lung cancer. The ultraviolet radiation from the sun especially in the summer can cause skin cancer. In U.S. some people like sunbathing under the hot sun just for fun. Third‚ diet and activity are also causes of the cancer. In modern life‚ many people eat fast food frequently
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warnings. Radiation hazards Equipment such as radioactive gauging devices or the radioactive trace element used in analytical chemistry produce Ionising radiation. Non-ionising radiation covers infrared radiation (heat-producing processes)‚ lasers‚ ultraviolet radiation (welding‚ sunlight)‚ and microwaves (high-frequency welders‚ freeze drying). Electrical hazards These include the risk of injury from all forms of electrical energy. Lighting hazards Inadequate lighting levels are a potential safety
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The human skin contains the epidermis‚ which is the farthest layer of skin‚ it provides a waterproof barrier and creates our skin tone. The dermis‚ beneath the epidermis‚ contains tough connective tissue‚ hair follicles‚ and sweat glands. The deeper subcutaneous tissue‚ which is the hypodermis‚ is made of fat and connective tissue. In the the epidermis most of the cells are keratinocytes‚ they come from the deepest layer of the epidermis and with time makes its way to the surface of the epidermis
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Biology 123 Assuming Responsibility for Environmental Mutagens Mutagens are any agents within an environment which increase the chances of a mutation in DNA. The best known mutagens are radiation (such as those from the sun’s ultraviolet rays or chemical weapons) and organic chemicals (such as those found in pesticides). Although some mutagens are natural and cannot be prevented or avoided‚ there are some which society has a direct effect on the creation of and handling. The population’s
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Questions: (A) Explain what the advertisement is attempting to get across to the consumer? It is telling you that skin cancer is more than a mole and that sunscreen is not enough to prevent skin cancer or Melanoma. They just want you to prevent skin cancer by doing five simple things by wearing a hat‚ clothing‚ seeking shade‚ wearing sunglasses and wearing SPF30+ sunscreen. (B) Evaluate the effectiveness of the advertisement using the scaffold provided by your teacher. I think the
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Senate committee approved legislation that would make California the first state in the nation to ban teenagers from hitting the indoor tanning bed. The bill follows a statement in February by the American Academy of Pediatrics calling for a ban on ultraviolet (UV) tanning beds and similar devices for anyone under the age of 18‚ according to state Sen. Ted Lieu‚ who says “because skin damage is cumulative‚ the more exposure to tanning beds you have early in life‚ the worse it is later in life.” Several
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