Causes and Effects of alcohol and marijuana use essays

Causes and Effects of alcohol and marijuana use essays Most all of us have been there, a Friday night, the end of a school week, looking for somewhere to go and something to do, when the phone rings............Hey, I heard about this party going on why dont you go with me. You, having been looking for something to do, eagerly oblige. You arrive at the party and are met with a barrage of beer, hard liquor, and drugs. What do you do? If youre me, you turn everything down, due to the fact that your hardcore straight edge. But what if you dont turn it down? Before you take that drink or take a hit off of that doob, consider this............. Alcohol is one of the most widely used mood altering substances on the market. According to Willamette University, Thirteen percent of male and five percent of female college students nationwide are alcoholics. Many people associate drinking with social environments. Why? This is because alcohol takes the edge off and allows one to relax. It allows someone to let go and enjoy ones self around others. Another attraction is that drinking allows one to unwind and temporarily separate themselves from the demands of life. What people dont think about is how this can affect them in the long run. A major effect of alcohol is impaired judgment. This can lead to severe consequences. Not only car accidents and other bad decisions, but long term alcohol abuse can cause cancer, heart attack, high blood pressure and can increase the risk of breast cancer in women. People develop a high tolerance to alcohol when they drink a great deal over an extended length of time, which means that you need m ore for a buzz. More alcohol means more money. Another common fancy among those who frequent parties is Marijuana. Marijuana is commonly smoked. Those who smoke marijuana may experience a feeling of euphoria, which tends to make those who use marijuana talk and laugh more than usual. Colors, sounds, and tastes become more plea...

How Itching Works and Why Scratching an Itch Feels Good

How Itching Works and Why Scratching an Itch Feels Good Humans and other animals itch for a variety of reasons. Scientists believe the underlying purpose of the annoying sensation (called pruritus) is so we can remove parasites and irritants and protect our skin. However, other things can lead to itching, including drugs, diseases, and even a psychosomatic response. How Itching Works While drugs and disease typically stimulate itching because of a chemical response, most of the time the sensation is a result of skin irritation. Whether the irritation starts from dry skin, a parasite, an insect bite, or chemical exposure, the itch-sensing nerve fibers (called pruriceptors) become activated. Chemicals that activate the fibers may be histamine from inflammation, opioids, endorphins, or the neurotransmitters acetylcholine and serotonin. These nerve cells are a special type of C-fiber, structurally like the C-fibers that transmit pain, except they send a different signal. Only about 5% of C-fibers are pruriceptors. When stimulated, pruriceptor neurons fire a signal to the spinal cord and the brain, which stimulates a rubbing or scratching reflex. In contrast, the response to the signal from pain receptors is an avoidance reflex. Scratching or rubbing an itch stops the signal by stimulating pain receptors and touch receptors in the same region. Drugs and Diseases That Make You Itch Since the nerve fibers for itching are in the skin, it makes sense most itching starts there. Psoriasis, shingles, ringworm, and chicken pox are conditions or infections that affect the skin. However, some drugs and illnesses can cause itching without underlying skin irritation. The antimalarial drug chloroquine is known to cause severe itching as a common side effect. Morphine is another drug known to cause itching. Chronic itching can result from multiple sclerosis, certain cancers, and liver disease. The ingredient that makes peppers hot, capsaicin, can cause itching as well as pain. Why Scratching an Itch Feels Good (But Isnt) The most satisfying relief for an itch is to scratch it. When you scratch, neurons fire pain signals to your brain, which temporarily overrides the itching sensation. The feel-good neurotransmitter serotonin is released to provide relief from the pain. Essentially, your brain rewards you for scratching. However, a study conducted at Washington University School of Medicine in St. Louis indicates scratching ultimately intensifies the itch because serotonin binds 5HT1A receptors in the spinal cord that activate GRPR neurons that stimulate more itchiness. Blocking serotonin isnt a good solution for people suffering chronic itching because the molecule is also responsible for growth, bone metabolism, and other key processes. How to Stop Itching So, scratching an itch, while pleasurable, is not a good way to stop itching. Getting relief depends on the cause of the pruritis. If the issue is skin irritation, it may help to cleanse the area with a gentle soap and apply an unscented lotion. If inflammation is present, an antihistamine (e.g., Benadryl), calamine, or hydrocortisone may help. Most pain relievers dont diminish itchiness, but opioid antagonists  offer relief to some people. Another option is to expose skin to sunlight or ultraviolet light (UV) therapy, apply a cold pack, or apply a few electrical zaps. If itching persists, its a good idea to see a doctor to check for underlying medical conditions or itching in response to a drug. If you absolutely cant resist the urge to scratch, try rubbing the area rather than scratching it. If all else fails, a German study indicates you can lessen itching by looking into a mirror and scratching the corresponding non-itching body part. Itching Is Contagious Are you getting itchy reading this article? If so, its a completely normal reaction. Itching, like yawning, is contagious. Doctors who treat itchy patients often find themselves scratching as well. Writing about itching leads to itchiness (trust me on this). Researchers have found people attending lectures on itching scratch themselves a lot more often than if they were learning about a different topic. There may be an evolutionary advantage to scratching when you see another person or animal do it. Its likely a good indicator you might want to check for biting insects, parasites, or irritating plants.