Chapter 19, Problem 53A

(a)

Interpretation Introduction

Interpretation: The reason of use of cobalt-57 for the study of the use of vitamin B₁₂ in body is to be explained.

Concept Introduction: Radioisotopes are the radioactive elements with different mass number and same atomic number of an element. They exhibit radioactive properties and emit certain radiations while decaying to daughter nuclei.

Answer to Problem 53A

Since Cobalt is one of the component of vitamin-B₁₂so radioactive isotope can use to track the presence of this vitamin.

Explanation of Solution

Since Cobalt is one of the component of vitamin-B_12.Thus the presence and use of this vitamin can be track with the help of radioactive isotope of cobalt. Cobalt-57 is the radioactive isotope of cobalt therefore it can use to track the presence of this vitamin.

(b)

Interpretation Introduction

Interpretation: The reason of use of Calcium-47 for the study of the use of vitamin B₁₂ in body needs to be explained.

Concept Introduction: Radioisotopes are the radioactive elements with different mass number and same atomic number of an element. They exhibit radioactive properties and emit certain radiations while decaying to daughter nuclei.

Answer to Problem 53A

Since calcium is one of the component of bones so radioactive isotope can use to track the bone metabolism.

Explanation of Solution

Since calcium is one of the component of bones as it is present in the form of phosphate compounds of calcium.Thus the metabolism activities in bone can be track with the help of radioactive isotope of calcium. Calcium-47 is the radioactive isotope of Ca therefore it can use to track the bone metabolism.

(c)

Interpretation Introduction

Interpretation: The reason of use of iron-59 for the study of the use of red blood cell functions needs to be explained.

Concept Introduction: Radioisotopes are the radioactive elements with different mass number and same atomic number of an element. They exhibit radioactive properties and emit certain radiations while decaying to daughter nuclei.

Answer to Problem 53A

Since Fe is one of the component of RBC’sso radioactive isotope of Fe can use to track the cell functioning of RBC’s.

Explanation of Solution

Since Fe is one of the component of RBC’s. Thus the cell functioning of RBC’scan be track with the help of radioactive isotope of Fe. Fe-59 is the radioactive isotope of Fe therefore it can use to track the cell functioning of RBC’s.

(d)

Interpretation Introduction

Interpretation: The reason of use of mercury-197 for the brain scans before the CAT scan became available needs to be explained.

Concept Introduction: Radioisotopes are the radioactive elements with different mass number and same atomic number of an element. They exhibit radioactive properties and emit certain radiations while decaying to daughter nuclei.

Answer to Problem 53A

Mercury-197 for the brain scans before the CAT scan became available because decay of Hg-197 releases high energy gamma radiations.

Explanation of Solution

Mercury-197 for the brain scans before the CAT scan became available because decay of Hg-197 releases high energy gamma radiations. Another isotope which was in use for brain scan is Hg-203. It also show beta decay and releases high energy particles which can be detected easily during scan process.