What stage of cellular respiration would lack of iron | Homework Helpers

Q1. In cases of severe iron deficiency, cellular respiration cannot proceed usually. Disregarding problems related to hemoglobin or red blood cells, at what stage of cellular respiration would lack of iron cause the greatest problem(s)?

Q2. Trace the path from the right femoral vein to the lower lobe of the right lung via the pulmonary artery. I must describe all major structures that it passes by or through. Once I arrive at the lung I must describe the structures that one would see. Describe how body combats an invading bactrum. AIDress both specific and nonspecific immunity and the cells that are involved in each process. Once that is done cross the alveolar membrane and trace your route out of the body through the nose.