Bio Exam Essay Example | Topics and Well Written Essays - 1250 words

Bio Exam - Essay Example (In the upper right-hand corner of your screen, see Options, then Account Preferences to enable the RTE.) 8) Different molecules can diffuse through the layers of the skin. For example, Nitrogen, carbon dioxide and Oxygen can penetrate the skin in small amounts. This finds a useful application in modern medicine as certain medications can be administered through skin. However it also has a potential drawback since certain small harmful substances like very small nanoparticles can also diffuse through the skin and cause damage. Â   Cystic Fibrosis is a genetic condition in which a person produces very thick and sticky mucus. Usually, the mucus flows easily and helps to trap bacteria and dirt particles but in a person with cystic fibrosis, the mucus is sticky and hence it is difficult to regulate. It is a genetic disorder hence most of the time it is passed from the parents to the offspring. The symptoms include constipation, bulky stool, thick mucus, short breath and infections by uncommon bacteria. Possible management approaches include early detection and regular treatment and to also avoid substances that stimulate the creation of mucus. a) One of the most fascinating systems of the human body is the nervous system. The most basic unit of which is a cell, a neuron or a nerve cell. Many different types of neurons give a nerve tissue. These different tissues combine to form an organ like a brain. Different organs like the brain and the spinal cord make up the nervous system. b) The smallest unit of matter is an atom whereas the smallest unit of life is the cell. All cells are made up of matter and hence atom. We can draw an analogy between the levels of organization in each of them. Individual cells combine to give tissues, which coordinate with other types of tissues to give organs and at the end we get a system which is further amalgamated with other