Question

All of the cells in the body need oxygen. Hemoglobin molecules in red blood cells transport oxygen through the bloodstream. Oxygen is loaded onto hemoglobin molecules in the lungs and unloaded from the hemoglobin molecules in the tissues.

What drives the unloading of oxygen from hemoglobin molecules in the tissues?

A. the low partial pressure of oxygen in the lungs
B. the high partial pressure of carbon dioxide in the lungs
C. the low partial pressure of carbon dioxide in the lungs
D. the high partial pressure of oxygen in the lungs

Answer 1

Answer:

D. the high partial pressure of oxygen in the lungs

Explanation:

• As the cells of the human body are made of the Hemoglobin molecules that transport this red blood to the bloodstreams.

• Due to the presence of the dissolved oxygen concentration in the body that these molecules in the lungs are unloaded and then merges with the tissues.

• The higher pressure is responsible for the flow of the oxygen in the lungs and the thus formation of the RBC in hemoglobin.