MCQ Detailed View

The normal body temperature of a healthy human is approximately 37°C (Celsius), which is equal to 98.6°F (Fahrenheit). This temperature is considered the average value for maintaining normal metabolic processes and proper functioning of organs and enzymes. The human body works best within a narrow temperature range, usually between 36.1°C to 37.2°C (97°F to 99°F).Body temperature is regulated by a part of the brain called the hypothalamus, which maintains balance between heat production and heat loss. The body generates heat mainly through metabolic reactions, muscle activity, and chemical processes, while excess heat is lost through sweating, breathing, and skin circulation.

Key points about body temperature:

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  37°C is the standard average, but slight variations can occur due to time of day, physical activity, age, and overall health.

  
  


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  Fever (above 38°C) indicates the body is fighting infections.

  
  


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  Hypothermia (below 35°C) can occur in extreme cold and may lead to dangerous health conditions.

  
  


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  Hyperthermia (above 40°C) is an abnormally high temperature, potentially life-threatening if not treated.

  
  

Explanation of other options:

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  81.1°C: Far above survivable temperature for humans.

  
  


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  98.6°C: This is actually in Fahrenheit, not Celsius, so it is misleading in this format.

  
  


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  21.7°C: Much lower than the required body temperature for living humans.

  
  

Maintaining a stable 37°C allows enzymes and biochemical reactions to work efficiently, ensuring survival and proper functioning of all body systems.

In conclusion, the normal body temperature of a healthy human being is 37°C, making option B (37.0°C) the correct answer for this biology MCQ.