Answer
Adding Fe-59 to a person's diet and allowing a few days for its isotope to be incorporated in the person's body will allow for isolation of red blood cells from a blood sample, allowing for monitoring radioactivity from the hemoglobin molecules present in the RBCs.
Work Step by Step
Adding Fe-59 to a person's diet and allowing a few days for its isotope to be incorporated in the person's body will allow for isolation of red blood cells from a blood sample, allowing for monitoring radioactivity from the hemoglobin molecules present in the RBCs.