BIO 102 Lecture Notes - Lecture 17: Bird Anatomy, Gas Exchange, Cellular Respiration
17 Apr 2017
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Cellular respiration - supported by exchange of gases - requires steady supply of o2 - generates co2 as a waste product. Formula: c6h12o6 + 6o2 6co2 +6h2o + atp. Respiration - organismal respiration - process by which organisms exchange gases with the environment, taking in o2 and releasing co2. Gas exchange relies on diffusion (requiring concentration gradients of gases) Three adaptations used by animals to facilitate diffusion: Respiratory surfaces remain moist since only gases dissolved in water can diffuse into or out of cells. Respiratory surfaces are very thin to minimize diffusion distances. Respiratory surfaces have a sufficiently large surface area in contact with the environment to allow adequate gas exchange by diffusion to meet the needs of the organism. Inactive animals - don"t require large amounts of atp - lack specialized respiratory organs - rely on diffusion. Sponges - use ciliated cells to create a current of water, which moves through pores in their bodies into a central chamber.
