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

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

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

What is the role of astrocytes in CBF regulation?

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

What is the effect of increased COâ‚‚ on CBF?

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

What is the role of myogenic factors in CBF regulation?

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

What is the effect of glutamate on astrocytes?

<p>Stimulates vasodilation (A)</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 (C)</p> Signup and view all the answers

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

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

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

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

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