BharatNotes Haemoglobin
noun (mass/uncountable; chiefly British spelling — US: hemoglobin)Usage in a UPSC answer
India's persistently high burden of anaemia, reflected in dangerously low haemoglobin levels among adolescent girls and pregnant women, underscores why nutritional security must be treated as a core developmental imperative rather than a peripheral health concern.
Synonyms
Word Family
haemoglobinous (adj), haemoglobinopathy (n), haemoglobin (n), haemic (adj), haematology (n)
Root
Greek haima = blood; Latin globulus = little ball (globulin protein); coined hæmatoglobin 1845
Etymology
From Greek haima ("blood") + Latin globulus ("little ball," referring to the globulin protein); coined as hæmatoglobin in 1845, shortened to hæmoglobin by 1862.
Memory Hook
Haemo- = "blood" (as in haemorrhage), -globin = a "globe/ball" of protein: picture a tiny red globe of protein ferrying oxygen through your blood.
How This Word Works in UPSC Writing
The iron-containing protein in red blood cells that binds oxygen in the lungs and releases it in the tissues. Its GS3 relevance runs through public health, since iron-deficiency anaemia is a major nutritional problem in India and haemoglobin concentration is the standard measure used to detect it. The affinity mechanism is worth naming too, as it explains why carbon monoxide is so dangerous: it binds far more tightly than oxygen and blocks transport.
Don’t Confuse It With
Haemoglobin carries oxygen in the blood. Myoglobin stores oxygen in muscle tissue. Anaemia is the condition of insufficient haemoglobin or red cells. Plasma is the fluid component of blood, which carries dissolved substances but not the bulk of the oxygen.
Hindi Meaning
हीमोग्लोबिन (hīmoglobin) or रक्तवर्णिका.
Common Questions
- What is haemoglobin?
- The iron-containing protein in red blood cells that binds oxygen in the lungs and releases it to the body's tissues.
- Why is carbon monoxide dangerous?
- It binds to haemoglobin far more tightly than oxygen does, blocking oxygen transport even when breathing continues normally.
Seen in UPSC Question Papers
- Prelims 2020 — Biology
Real UPSC previous-year questions whose text uses “Haemoglobin” — proof this word earns its place on your list.
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