Which one of the following is NOT correct regarding the cerebral circulation?
- Cerebral oxygen consumption is about 20% of total body oxygen consumption
- The brain uses glucose as its main energy source
- Autoregulation maintains a constant cerebral blood flow for mean arterial pressures (MAP) between 60-160mmHg.
- Cerebral blood flow is very sensitive to arterial pO2
- Local metabolites, ADP, K+ and H+ ions, all increase cerebral blood flow