Chapter 2: Q2.1-2CC. (page 30)

Is a trace element an essential element? Explain.

Short Answer

Expert verified

The elements needed in small amounts are trace elements. Few trace elements such as iron that form an important part of hemoglobin are essential elements. So, the trace elements are essential for the body but only in tiny quantities.

Step by step solution

Essential elements and their importance

The biological system is composed of multiple elements required for healthy growth, development, and physiology. These are known as essential elements without which the body cannot function effectively. Hydrogen, phosphorus, carbon, and oxygen are some of the essential elements.

The essential elements are present in varying quantities and are classified as macro and micro. The former is required in high quantities while the latter is in small amounts.

Meaning of trace elements

The elements present in small amounts are trace elements such as iron (Fe) and iodine (I). These elements can pose potentially toxic risks if present in higher amounts. For example, higher amounts of iodine in the body can influence thyroid gland activity and result in thyroid cancer.

The trace elements are chemicals present as low as 0.1% in quantity, but they effectively contribute to bodily functions.

Trace element as an essential element

Though required in smaller amounts, trace elements can affect the body functions if they are present in lower than the optimum quantities. They have important roles in the biological system, and their deficiency can degrade the body.

Iodine is a trace element but important for the functioning of the thyroid, and hence, it is an essential element. Thus, the trace elements are physiologically and metabolically essential elements required by the body.