Briefly discuss the means of thermogenesis used by endotherms and any changes or additions that are demonstrated in these environments to enhance heat production or retention. Respiration and gas exchange are the final issues that we discussed. We are already familiar with the structure and function of trachea, gills and lungs. We do not need to discuss these again. Instead, I would like to deal with hypoxia.
Different organisms face hypoxic conditions daily, seasonally or during specific activities.
Organisms use the same basic responses across the three environments that we discussed. Describe the general behavioral and structural respiratory responses to hypoxia and explain the advantages to each. Provide examples where appropriate.