Monday, March 30, 2020
Alcohol1 essays There are some 14 million people in the United States and 1 out of every 13 adults are considered alcoholics or at least experience drinking problems to some degree. Most people just dont understand the consequences of drinking. Alcoholism is a disease and unless something is done, more and more will be affected by this dangerous drug. A bad withdraw from this drug can lead to death, not even heroin results in death as The majority of people see alcohol as a social outlet and does not consider it to be as dangerous as it may really be. Alcoholism is an often-progressive disease with symptoms that include a strong need to drink despite negative consequences, such as serious job and health problems. The thing about alcohol is that a person does not need to be an alcoholic to experience problems with alcohol. Just a couple of drinks for anyone can result in irresponsible behavior, clumsiness, slurred speech, loss of balance, If you are diagnosed as an alcoholic you can not just try to cut down on drinking and think that this will help. Studies show that nearly all alcoholics who try to merely cut down on drinking are unable to do so indefinitely. Instead, cutting out alcohol is nearly necessary for successful recovery. Alcohol has direct toxic as well as sedative effects on the body, and failure to take care of nutritional and other physical needs during prolonged periods of excessive drinking may further complicate matters. Some cases even require hospitalization. The effects on major organ systems can be dramatic. A wide rang of digestive-systems can be affected, such as ulcers, inflammation of the pancreas, and cirrhosis of the liver. The central and peripheral nervous systems can be permanently damaged. In advanced cases, abstinence from alcohol may result in a ...
Saturday, March 7, 2020
Habits and Traits of Stoneflies, Order Plecoptera Aquatic stonefly nymphs live only in cool, clean streams, and are an important bioindicator of good water quality. Stoneflies belong to the order Plecoptera, which comes from the Greek for twisted wings. Description Adult stoneflies are fairly drab insects, with flattened, soft bodies. They hold their wings flat over the bodies when at rest. Stonefly adults have long, threadlike antennae, and a pair of cerci extends from the abdomen. Stoneflies have two compound eyes and three simple eyes and chewing mouthparts, though not all species feed as adults. Stoneflies fly poorly, so they dont stray far from the stream where they lived as nymphs. Adults are short-lived. Stoneflies exhibit unusual courtship behavior. The males drum their abdomens on a substrate to send an acoustic signal to potential female mates. A receptive female drums her response. The pair will continue to drum to each other, gradually moving closer and closer until they meet, and mate. After mating, females deposit their eggs in the water. Stonefly nymphs develop slowly, taking 1 to 3 years to molt repeatedly before emerging as adults. Stoneflies are so named because the nymphs often live under stones in streams or rivers. They feed on a variety of plant and animal matter, both dead and living, depending on the species and age of the nymph. Habitat and Distribution As nymphs, stoneflies inhabit cold, fast-flowing streams in pristine condition. Adult stoneflies are terrestrial but tend to stay close to the streams from which they emerge. Worldwide, entomologists identify about 2,000 stonefly species, about a third of which live in the U.S. and Canada. Major Families in the Order Family Perlidae - common stonefliesFamily Leuctridae - rolled-winged stonefliesFamily Taeniopterygidae - winter stonefliesFamily Nemouridae - spring stoneflies Families and Genera of Interest Adult stoneflies in the subfamily Isoperlinae appear to be pollen feeders.Female Pteronarcys dorsata stoneflies measure as much as 55 cm in length.Nymphs of the family Peltoperlidae resemble cockroaches.The Lake Tahoe benthic stonefly, Capnia lacustra, spends its entire life cycle (even as an adult) deep within Lake Tahoe. It is an endemic species to Lake Tahoe. Sources Borror and DeLongs Introduction to the Study of Insects, 7th Edition, Charles A. Triplehorn, and Norman F. Johnson.Order Plecoptera - Stoneflies, Bugguide.net. Accessed online February 15, 2011.Guide to Aquatic Insects and Crustaceans, Izaak Walton League of America.