\ \ \ \ \ \ \ deficiency is the most common cause of thyroid disease, specifically hypothyroidism. - MP NHM CHO-2024 (Shift-2)

MP NHM CHO-2024 (Shift-2)

Applied Nutrition & Dietetics

Easy

Appeared in: MP NHM CHO-2024 (Shift-2)

Explanation

Iodine is an essential micronutrient that the body cannot produce on its own and must be obtained from the diet.
It is a fundamental structural component of the thyroid hormones, thyroxine (T4) and triiodothyronine (T3).
Insufficient dietary iodine impairs the thyroid gland's ability to synthesize these hormones, leading to a decreased metabolic rate, a condition known as hypothyroidism.
The World Health Organization identifies iodine deficiency as the most common cause of hypothyroidism and preventable intellectual disability worldwide.

Option B: Calcium deficiency primarily affects bone mineralization and neuromuscular function.
Option C: Iron is essential for hemoglobin synthesis and oxygen transport; its deficiency causes anemia.
Option D: Sodium is a key electrolyte for maintaining fluid balance and nerve function; its deficiency (hyponatremia) causes neurological symptoms.

Visual 1: Diagram - A flowchart showing how dietary iodine is trapped by the thyroid gland and incorporated into T3 and T4 hormones.
Visual 2: Image - A clinical photograph of a person with a large goiter, illustrating a physical sign of severe, chronic iodine deficiency.
Visual 3: Infographic - A table comparing the primary functions and deficiency diseases of essential minerals like iodine, iron, calcium, and zinc.

Clinical Relevance

Nursing practice connection: Knowing Role of iodine in thyroid hormone synthesis and causes of hypothyroidism helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses play a crucial role in patient education regarding nutrition, including the importance of consuming iodized salt, especially in regions where iodine deficiency is endemic.
In India, the National Iodine Deficiency Disorders Control Programme (NIDDCP) is a key public health initiative that nurses should be aware of, promoting the use of iodized salt to prevent goiter and cretinism.
Assessment for signs of hypothyroidism (e.g., fatigue, weight gain, cold intolerance, goiter) is a key nursing responsibility during routine health check-ups.

How to Approach the Question

First, identify the key terms in the question: 'deficiency', 'most common cause', 'thyroid disease', and 'hypothyroidism'.
The question asks for a specific nutrient whose lack leads to hypothyroidism.
Recall the basic physiology of the endocrine system, specifically the thyroid gland. What is the primary building block for thyroid hormones?
Evaluate each option based on its main physiological role:
Calcium is for bones and nerves.
Iron is for red blood cells and oxygen.

Concept Tested & Keywords

Concept Tested: Role of iodine in thyroid hormone synthesis and causes of hypothyroidism.
Stem keywords: deficiency, thyroid disease, hypothyroidism, most common cause
Lead-in keywords: MOST
Negative lead-in flag: false

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