Life Science - Grade 11 Homeostasis HOMEOSTASIS means keeping a constant internal environment. It is carried out around the whole body. Homeostasis reaches from every cell up to whole organs and systems. If there was not a constant internal environment, our enzymes would not work properly. That would mean that nothing would operate correctly and we would die. There are basically 6 things that are essential for health and that must be controlled: A cool way to remember these 6 things is by learning this... 1. Carbon Dioxide When (Water) 2. Urea Shall (Sugar) 3. Ions I (Ions) 4. Sugar Clean (CO2) 5. Water The (Temperature) 6. Temperature Utensils (Urea) WHICH ORGANS ARE INVOLVED? Hypothalamus: monitors water, temperature and carbon dioxide content of blood. Pituitary gland: secretes a number of hormones, a key one is ADH which is important in regulating the water content of the body. Liver: helps to control glucose content of the body by storing it as glycogen. It is also involved in temperature regulation, acting as the body’s furnace by increasing the rate of respiration when we are cold. Lungs: involved by getting rid of carbon dioxide from the body. Pancreas: involved in maintaining a constant amount of glucose in the body through the actions of glucagon and insulin. Muscles: of the body can help to maintain a stable body temperature as muscular activity and shivering help to generate heat. Kidney: are involved in controlling the amount of water in the body. Skin: is the largest organ and has a central role in maintaining a constant temperature.
Posted on: Sat, 22 Jun 2013 06:18:31 +0000
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