Question

in order to do a spinal tap to collect a csf sample, you must insert the needle in the

a. subdural space
b. arachnoid mater
c. epidural space
d. pia mater
e. subarchnoid space

which cells secrete csf?
a. astrocytes
b. oligodendrocytes
c. schwann cells
d. ependymal cells
e. satelite cells

Explanation:

For the first question, cerebro - spinal fluid (CSF) is located in the subarachnoid space, so the needle is inserted there for a spinal tap. For the second question, ependymal cells line the ventricles of the brain and secrete CSF.

Answer:

1. e. subarachnoid space
2. d. Ependymal cells