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Restate the question in your own words, predict the answer before checking the options, and confirm that the explanation and correct-option field both point to Iron.
Haemoglobin contains a heme group with an iron (Fe²⁺) ion at its center that binds to oxygen. When dietary iron is insufficient, the body cannot produce enough haemoglobin, resulting in fewer and smaller red blood cells. This leads to anaemia, characterized by fatigue, pale skin, weakness, and breathlessness. Iron-rich foods include spinach, lentils, red meat, liver, and fortified cereals. Calcium — Deficiency of calcium causes rickets in children and osteoporosis in adults (weak, brittle bones). It is NOT responsible for anaemia. Iodine — Deficiency of iodine causes goitre (enlarged thyroid gland) and hypothyroidism. It has no direct role in causing anaemia. Zinc — Deficiency of zinc causes growth retardation, delayed sexual maturation, impaired immune function, and taste/smell disturbances. It does not cause anaemia. 📝 Important Note: Mineral deficiency diseases — Iron = Anaemia; Calcium = Rickets/Osteoporosis; Iodine = Goitre; Zinc = Growth retardation. Vitamin B12 and Folate deficiency cause megaloblastic (pernicious) anaemia — not iron deficiency anaemia. Women and children are most at risk of iron deficiency.
FAQ
Common questions and clear answers for this topic.
The digestive, circulatory, nervous, and skeletal systems appear most frequently, along with sensory organs and basic endocrine functions.
Yes, the human body has 206 bones, and questions about the largest, smallest, and total bone count appear fairly often.
Questions usually cover blood group compatibility, the role of platelets in clotting, and basic facts about blood pressure and heart function.
No, most questions focus on what each organ does and why, rather than the detailed biochemical processes behind it.
Linking facts to real-life observations, like why pulse is checked at the wrist, makes them easier to recall than memorizing textbook lines.
