Cells

10/17/2012

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The reason that I am able to know that my cell are still performing their daily activities and processes is that I would be dead if they weren't. For example, cells perform the process of breaking down food into energy and using the energy to keep the heart beating, which keeps blood flowing, and so on. Cells also use that energy to extract oxygen from the air in the lungs which is used, along with water, in most cell processes that maintain homeostasis. Without homeostasis, any organisms becomes dangerously sick, and dies if homeostasis is not regained quickly enough. For example, part of homeostasis is a body temperature of 98.6 degrees Farenheight. Cells perform activities such as shivering and sweating to keep the body at that temperature. If cells were not carrying out their body heat regulation activities, the temperature would ethier rise or plummet, an act devastating to the organism. Cells also remove waste from themselves and the rest of the body. If waste was not removed, the inner workings of the human body would be stretched, possibly to the point of tearing from a buildup of dead cells and other matter. Cells also tell the body if they need more water, oxygen, food, etc. This is responsible for the reflex to breathe, and the urge to eat and drink, or thirst and hunger. Cells are also responsible for growth and change in the body, as they multiply themselves, and without cells growing in number and developing according to DNA, humans would stay babies forever. Those are only some of the activities cells carry out, there are many more that happen every day.



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