Brain CSF is secreted by the
a. choroid plexus.
b. subarachnoid villi.
c. neurons of the hypothalamus.
d. meninges.
e. spinal aqueducts.
Question 2
In the peripheral nervous system, the _______ and the _______ fuse together to form a single sheath that protects the spinal and cranial nerves and the autonomic ganglia.
a. dura mater; pia mater
b. arachnoid layer; dura mater
c. astrocytes; choroid plexus mater
d. arachnoid membrane; pia mater
e. glia; astrocytes