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14 Questions

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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?

Arterial CO₂ Signup and view all the answers

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

VD and ↑ CBF Signup and view all the answers

What is the role of astrocytes in CBF regulation?

Release vasodilators Signup and view all the answers

What is the effect of increased CO₂ on CBF?

VD and ↑ CBF Signup and view all the answers

What is the role of myogenic factors in CBF regulation?

Respond to changes in blood pressure Signup and view all the answers

What is the effect of glutamate on astrocytes?

Stimulates vasodilation Signup and view all the answers

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

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

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

Carrier-mediated transport Signup and view all the answers

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

Kernicterus, a type of irreversible brain damage Signup and view all the answers

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

Irreversible brain damage Signup and view all the answers

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

It is immature and incomplete Signup and view all the answers