Field Internship Student Data Acquisition Project. (FISDAP) Airway Practice Exam

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What is the main difference between external and internal respiration?

  1. Location of gas exchange

  2. The type of gases exchanged

  3. Speed of gas diffusion

  4. The involvement of lung structure

The correct answer is: Location of gas exchange

The primary distinction between external and internal respiration lies in the location of gas exchange. External respiration refers to the process occurring in the lungs where oxygen is inhaled into the alveoli and exchanged for carbon dioxide from the blood. This process is crucial for oxygenating the blood that will circulate to the rest of the body. On the other hand, internal respiration takes place at the cellular level throughout the body. Here, oxygen is delivered to the tissues, where it is utilized for metabolic processes, and carbon dioxide, a waste product, is created and transported back to the lungs for expulsion. Understanding this difference highlights the specific roles that the lungs and tissues play in the respiratory process, reinforcing the importance of both external and internal respiration in maintaining proper oxygen levels in the body and removing waste gases. This knowledge is fundamental in various medical and biological applications, particularly those related to respiratory function.