Cold sores - painful sores on the lips and around the mouth, caused by a virus. Canker sores - painful sores in the mouth, caused by bacteria or viruses. Thrush - a yeast infection that causes white patches in your mouth. Leukoplakia - white patches of excess cell growth on the cheeks, gums or tongue, common in smokers.
Metabolism is a combination of chemical reactions that are spontaneous and release energy and chemical reactions that are non-spontaneous and require energy in order to proceed. Living organisms must take in energy via food, nutrients, or sunlight in order to carry out cellular processes.
Cells need energy to perform processes in order to sustain life. In plants, energy from the sun is needed for photosynthesis, a process which allows the plant to create glucosâ¦e for food. Animals then get their energy from plants and other animals and convert this energy into ATP energy for processes like cellular respiration and protein synthesis. All these processes require energy and work together to keep the organism alive.