Gas Exchange : A Important Bodily Process

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Part A

Gas exchange is a very important bodily process that many organisms undertake. Gas exchange involves the exchanges of gases, namely oxygen - needed for cell respiration - and carbon dioxide - a waste product produced by cell respiration - in order to continue producing energy. This process is important, as without it, we would not be able to undertake cell respiration, which is integral for producing adenosine triphosphate (ATP), a source of energy. Without gas exchange, cells would most likely die. Even though there are many different organisms that utilise their own methods of gas exchange, what they all have in common is that they need oxygen, and do not need carbon dioxide. Oxygen is taken in by the organism, and carbon dioxide is released by the organism.

Diffusion plays a big role in the process of gas exchange. In this context, diffusion is a movement of a gas from an area of a high concentration to a low concentration, until an equilibrium is reached. Diffusion allows an organism to obtain oxygen necessary for cells in order to stay alive. This in turn, can be affected by environmental factors such as temperature (high temperature means that the particles have more energy, so they diffuse faster), concentration of the gas (higher concentration means that there is a steeper diffusion gradient, so diffusion will be faster) and distance travelled (a smaller distance will cause a faster diffusion). Diffusion is a passive process, as it does not require energy
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