Figure out the micronutrient from the following?

Appeared in: WCL Staff Nurse - 2022

Explanation

Minerals are classified as micronutrients, which are essential dietary elements required by the body in very small quantities.
Unlike macronutrients, micronutrients do not provide energy (calories) but are vital for regulating metabolic processes, building strong bones and teeth, and maintaining fluid balance.
Examples of essential minerals include calcium for bone health, iron for oxygen transport in the blood, and iodine for thyroid hormone synthesis.

Option A: Protein is a macronutrient, required in large amounts for building and repairing tissues, and it provides 4 kcal of energy per gram.
Option B: Fat is a macronutrient, serving as a concentrated energy source (9 kcal/g) and is essential for absorbing fat-soluble vitamins.
Option D: Carbohydrate is the body's primary macronutrient source of energy, providing 4 kcal per gram.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of nutrients into macronutrients and micronutrients as background academic context rather than a clinical decision trigger.
Nurses assess patients' nutritional status to identify deficiencies or excesses. Understanding the difference between macro and micronutrients is fundamental for nutritional counseling and planning dietary interventions.
For instance, a patient with anemia may need counseling on increasing iron-rich foods (a micronutrient), while a malnourished patient may need a diet balanced in both macronutrients for energy and protein, and micronutrients for recovery.
What if? If a patient is on a very restrictive diet (e.g., for weight loss), a nurse must assess for potential micronutrient deficiencies (like iron, calcium, B vitamins) even if their calorie intake (from macronutrients) seems adequate.

How to Approach the Question

First, identify the key term in the question: 'micronutrient'.
Recall the basic classification of nutrients. Nutrients are divided into two main groups: macronutrients and micronutrients.
Define macronutrients: these are needed in large amounts and provide energy (calories). The three macronutrients are carbohydrates, proteins, and fats.
Define micronutrients: these are needed in small amounts and do not provide energy. The two types of micronutrients are vitamins and minerals.
Review the given options: Protein, Fat, and Carbohydrate are all macronutrients.
The only remaining option, Mineral, fits the definition of a micronutrient. Therefore, it is the correct answer.

Concept Tested & Keywords

Concept Tested: Classification of nutrients into macronutrients and micronutrients.
Stem keywords: micronutrient, nutrient
Lead-in keywords: Figure out

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E6 textbook of Applied Biochemistry and Nutrition & DieteticsHarbans Lal (pp 26-464 of 479) p. 238-240

E6 Nutrition Monika Sharma 3e p. 51-53

E6 Nursing Fundamentals Taylor p. 492-494

Practise the full WCL Staff Nurse - 2022

Attempt every question from this paper in a timed mock, then review the full solution for each one.