What is the normal body temperature of a human?
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✅ Correct Answer: B — 37 degree C
The normal human body temperature is 37°C (98.6°F). This temperature is tightly regulated by the Hypothalamus. At this temperature, all enzyme-based biochemical reactions in the body function optimally. Any significant deviation from this temperature affects bodily functions.
❌ Why other options are wrong:
• A. 35°C — Temperature below 36°C indicates Hypothermia (dangerously low body temperature); organs begin to fail.
• C. 39°C — Temperature above 38°C indicates Fever (Pyrexia); the body is fighting an infection. 39°C is a high fever.
• D. 41°C — Temperature at 41°C is Hyperpyrexia (extreme fever); extremely dangerous, can cause brain damage and organ failure.
📝 Important Note: Normal body temperature = 37°C (98.6°F). Below 35°C = Hypothermia. Above 38°C = Fever/Pyrexia. Above 40°C = Hyperpyrexia (medical emergency). Hypothalamus regulates body temperature. Body temperature is lowest in early morning and highest in late afternoon. Frequently asked SSC CGL physiology question.
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