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Liver and Pancreas Functions · Physiology

Which of the following describes the liver's 'glucose buffer' function?

  1. The liver absorbs all of the dietary glucose and never releases it back
  2. The liver stores glucose after meals and releases it when levels fall
  3. The liver converts excess glucose into urea to maintain osmolarity
  4. The liver secretes its own insulin to lower blood glucose directly
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Correct answer: The liver stores glucose after meals and releases it when levels fall

By performing glycogenesis (storage) when glucose is high and glycogenolysis (release) when glucose is low, the liver acts as a buffer to maintain blood glucose levels within a narrow physiological range, vital for brain function.

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