Tutor profile: Bill B.
Subject: Environmental Science
The continual destruction of forests is one of the major environmental concerns of today. In terms of biodiversity and species survival, explain why the process of deforestation is a major concern. Also, explain how the process of deforestation is linked to global warming.
Forests allow for some of the most biodiverse areas on Earth. Biodiversity has many benefits including the availability of resources for humans (building materials, food, and medicines from plants), the stability of ecosystems and ecotourism. A high level of biodiversity is essential for the stability of an ecosystem. When biodiversity is limited, multiple food chains are affected which could lead to the extinction of multiple species. Trees in the forests are producers which remove carbon dioxide from the air through the process of photosynthesis. When trees are destroyed, there is less carbon dioxide being removed from the air, which leads to increased atmospheric carbon dioxide levels. Increased atmospheric carbon dioxide levels have been directly linked to an increase in global temperatures; a process known as global warming. Therefore, the process of deforestation can be a major contributor to global warming.
Subject: Biomedical Science
One of your friends has just been diagnosed with Type I diabetes and wants you to help her better understand this disorder. Using the following words, explain to your friend what Type I diabetes is and how it is treated: insulin, pancreas, receptors, hormone, glucose. Also, explain to your friend what the difference is between Type I and Type II diabetes.
Glucose is a sugar that is needed by cells to produce energy. In order for glucose to enter the cells, a hormone called insulin is required. This hormone is produced by the pancreas and is released when the blood contains high levels of glucose. Insulin binds to the receptors of cells and allows the glucose to enter. In a person with Type I diabetes, the pancreas does not produce insulin, therefore glucose stays in the blood which causes a high concentration of blood glucose. It is treated using insulin injections. The injected insulin works the same way as insulin produced in the pancreas, thus blood glucose levels decrease after insulin injections. A person with Type II diabetes does produce insulin, however, the cells do not respond to the insulin which means that glucose does not enter the cell. This also leads to increased levels of blood glucose.
ATP is an essential molecule required for all living things. Explain the overall reaction of cellular respiration by discussing: the raw materials required, where each raw material comes from, the products of the reaction, the purpose of ATP and name three body systems involved in this reaction and explain each of their roles.
Cellular respiration requires two raw materials: glucose and oxygen. Glucose is obtained from digested food and oxygen is inhaled from the air (which was made available by producers). During the process of cellular respiration, ATP, carbon dioxide, and water are produced. ATP is used as an energy source to power all chemical processes within an organism. This process requires the use of the respiratory system to inhale oxygen and exhale carbon dioxide, the digestive system where glucose is absorbed from digested food, and the circulatory system to transport glucose and oxygen to cells so that cellular respiration can occur.
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