CH 62: CBF, CSF, brain metabolism Flashcards
1
Q
Brain receives ____ of CO
A
15%
2
Q
How does CO2 regulate CBF
A
excess CO2 = increase CBF
3
Q
How does hydrogen ion concentration regulate CBF?
A
excess H+ = increase CBF
4
Q
What factors regulated CBF (4)?
A
- CO2
- H+
- O2
- Astrocyte substances
5
Q
Cerebral microcirculation
A
capillaries greatest where metabolic needs are most
i.e. grey matter metabolism 4x that of white matter
6
Q
How does CSF form?
A
Choroid plexus of ventricles
7
Q
where is CSF located?
A
- ventricles
- cisterns
- subarrachnoid space
