1. briefly describe the path that an oxygen molecule must take to go from your nose to muscle. 2-what role does hemoglobin play? 3-why is iron important in the body? where does it bind in hemoglobin? 4-name several foods that are rich in iron.

Lordosis can often be prevented by strengthening core muscles in the abdominals and back. a. true b. false

What is the function of reverse transcriptase in retroviruses? a) it uses viral rna as a template for dna synthesis.b) it converts host cell rna into viral dna.c) it translates viral rna into proteins.d) it uses viral rna as a template for making complementary rna strands.

Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?