Brain Physiology and Metabolism
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Questions and Answers

What is the primary source of energy for the brain?

  • Ketones
  • Amino acids
  • Fatty acids
  • Glucose (correct)

    • What is the effect of chronic hypertension on the autoregulatory curve?

  • It has no effect on the curve
  • It shifts the curve to the left
  • It increases the slope of the curve
  • It shifts the curve to the right (correct)

    • What is the term for the process by which the brain regulates its own blood flow to match metabolic demands?

  • Neuroregulation
  • Autoregulation (correct)
  • Metabolic adaptation
  • Homeostasis

    • What is the most potent vasodilator of the CBF?

    <p>Arterial CO₂</p> Signup and view all the answers

    What is the effect of a small drop in O₂ on CBF?

    <p>VD and ↑ CBF</p> Signup and view all the answers

    What is the role of astrocytes in CBF regulation?

    <p>Release vasodilators</p> Signup and view all the answers

    What is the effect of increased CO₂ on CBF?

    <p>VD and ↑ CBF</p> Signup and view all the answers

    What is the role of myogenic factors in CBF regulation?

    <p>Respond to changes in blood pressure</p> Signup and view all the answers

    What is the effect of glutamate on astrocytes?

    <p>Stimulates vasodilation</p> Signup and view all the answers

    What is the primary function of the blood-brain barrier?

    <p>To restrict the movement of large molecules and maintain the constancy of the internal environment</p> Signup and view all the answers

    What is the main transport mechanism across the blood-brain barrier?

    <p>Carrier-mediated transport</p> Signup and view all the answers

    What is the consequence of severely high bilirubin levels in a newborn?

    <p>Kernicterus, a type of irreversible brain damage</p> Signup and view all the answers

    What is the consequence of a 5-10 minute cessation of cerebral blood flow?

    <p>Irreversible brain damage</p> Signup and view all the answers

    What is the characteristic of the blood-brain barrier at birth?

    <p>It is immature and incomplete</p> Signup and view all the answers

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