Biology: Glucose and Blood Sugar Levels

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Questions and Answers

What is the primary energy source for brain cells?

  • Oxygen
  • Fructose
  • Insulin
  • Glucose (correct)

What is the normal concentration of glucose per 100mL of blood?

  • 150 mg
  • 70 mg
  • 110 mg/dL
  • 90 mg (correct)

What is the term for glucose concentrations below 70 mg/dL?

  • Hyperinsulinemia
  • Hyperglycemia
  • Diabetes
  • Hypoglycemia (correct)

What happens when the brain lacks glucose?

<p>Fainting (C)</p> Signup and view all the answers

What is the term for glucose concentrations above 110 mg/dL?

<p>Hyperglycemia (C)</p> Signup and view all the answers

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Study Notes

Glucose and Blood Sugar Levels

  • Glucose is the primary energy source for brain cells.
  • A lack of glucose can cause fainting.
  • The normal level of glucose in 100mL of blood is 90mg, but can vary between 70-150mg.
  • Hyperglycemia occurs when glucose concentrations exceed 110 mg/dl.
  • Hypoglycemia occurs when glucose concentrations fall below 70 mg/dl.

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