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Difficulty: MediumHealth, Nutrition, and Disease

Dietary minerals are essential inorganic micronutrients required to sustain critical physiological and metabolic functions in the human body. Match each dietary mineral on the left with its primary physiological role on the right.

  • IronConstitutes the core functional component of hemoglobin for oxygen transport
  • IodineEnables the synthesis of thyroid hormones that regulate metabolic rate
  • CalciumBuilds skeletal structure and mediates neuromuscular signaling and muscle contraction
  • PotassiumActs as the primary intracellular cation regulating resting membrane potential and fluid balance

Answer

Iron matches with oxygen transport in hemoglobin; Iodine matches with thyroid hormone synthesis; Calcium matches with skeletal structure and neuromuscular signaling; Potassium matches with intracellular fluid balance and membrane potential regulation.
Each mineral is paired accurately according to its core biological function: Iron forms the center of oxygen-carrying hemoglobin; Iodine is necessary for thyroid hormones that govern metabolic rate; Calcium constitutes bone matrix and triggers muscular contraction; and Potassium maintains intracellular fluid balance and neuronal resting potentials.

Step-by-Step Solution

1
Determine the biochemical role of Iron in circulatory physiology.
Iron is identified as the essential component of heme in hemoglobin for systemic oxygen delivery.
Erythrocytes depend on iron atoms to reversibly bind molecular oxygen from the pulmonary alveoli to peripheral tissues.
2
Determine the endocrine role of Iodine.
Iodine is linked to thyroid hormone production (T3 and T4).
The thyroid gland requires dietary iodide to synthesize hormones governing the basal metabolic rate.
3
Determine the structural and physiological functions of Calcium.
Calcium is paired with bone mineralization, muscle contraction coupling, and neurotransmission.
Most of the body's calcium resides in the skeletal matrix, with circulating calcium acting as an essential secondary messenger in neuromuscular junctions.
4
Determine the electrochemical role of Potassium.
Potassium is paired with intracellular osmotic regulation and resting membrane potential maintenance.
The sodium-potassium ATPase pump concentrates potassium inside the cell to maintain membrane excitability in nervous and cardiac tissues.

Key Concept

Essential Dietary Minerals and Their Physiological Functions
Estimated Time:1m 0s
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Topics

Health, Nutrition, and Disease

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