Cerebrospinal Fluid Functions and Anatomy

The brain ventricle located between the pons and the cerebellum is the _____ ventricle.

• third

• lateral

• fourth

• median

• falx

The partition between the lateral ventricles is the

• central canal.

• interventricular foramen.

• mesencephalic aqueduct.

• ventricular canal.

• septum pellucidum

Which is not a function of cerebrospinal fluid?

• 1. CSF helps to remove waste products from the brain.

• 1. CSF helps to reduce the effective weight of the brain.

• 1. CSF transports nutrients and chemicals to the brain.

• CSF helps to promote mitosis within neuronal tissue.

• CSF provides a liquid cushion to protect the brain from sudden movements.

Cerebrospinal fluid is formed by the

• choroid plexus.

• arachnoid villi.

• arachnoid granulation.

• septum pellucidum.

• mesencephalic aqueduct.

The amount of CSF within the brain at any given moment is approximately

• 600 ml.

• 1,200 ml.

• 130 ml.

• 12 ml.

• 4,800 ml.

Excess CSF is removed from the subarachnoid space by

• the median aperture.

• microglia.

• astrocytes.

• arachnoid villi.

• the choroid plexus.

List these events in the correct order for CSF flow in the CNS.
a: CSF flows into the arachnoid villi
b: CSF enters the blood
c: CSF flows through the cerebral aqueduct to the 4th ventricle
d: CSF flows into the subarachnoid space
e: CSF is produced by the choroid plexus

• 1. a, b, c, e, d

• 1. e, a, b, c, d

• 1. c, d, a, e, b

• e, c, d, a, b

• e, d, a, b, c

The blood-brain barrier is made up of

• 1. microglial extensions and capillary endothelial cells.

• 1. ependymal cells and venous blood vessels.

• astrocyte perivascular feet and capillary endothelial cells.

• astrocyte extensions and dural sinuses.

• 1. astrocyte perivascular feet and the falx cerebri.

The location of conscious thought processes and the origin of all complex intellectual functions is the

• cerebellum.

• pons.

• hypothalamus.

• corpus callosum.

• cerebrum.

The major pathway of communication between the right and left hemispheres is the

• cerebral gyri.

• cerebral sulci.

• longitudinal fissure.

• hypothalamus.

• corpus callosum.