The Ease with Which Iron Can Move from a Reduced

question 17

Multiple Choice

The ease with which iron can move from a reduced form to an oxidized form in its metalloprotein transferrin is important because:

• A) only the reduced form of iron can be stored as transferrin.
• B) transport of iron in transferrin occurs only in the oxidized state.
• C) it can block the excessive uptake of copper in hepatocytes.
• D) the oxidized form of iron reacts best when binding oxygen.

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Definitions:

Tachycardia

Rapid regular heart rate ranging between 100 and 150 beats/min.

Increased Thirst

An abnormally strong desire to drink fluids, often a symptom of dehydration or a sign of a significant medical condition like diabetes.

Decreased Cardiac Output

A condition where the heart pumps less blood than normal, affecting the body's ability to supply oxygen and nutrients to tissues.

Myocardial Contractility

Measure of stretch of the cardiac muscle fiber. It can also affect stroke volume and cardiac output. Poor contraction decreases the amount of blood ejected by the ventricles during each contraction.