Chapter 1.3 (page 6)

Question 1

what are 4 types of Glia cells

Answer 1

Astrocytes
Microglia
Oligodendrocytes
Ependymal

Question 2

________: Star-shaped and the most abundant of glia cells.

Answer 2

Astrocytes

Question 3

The ________ is a selective barrier that separates the blood tissue and the nervous tissue against harmful
chemicals that might be in the blood. the ________ cells preform this function

Answer 3

The blood-brain barrier

Astrocytes

Question 4

__________ also control the
chemical environment around neurons such as taking care of leaked potassium ions and recapturing released neurotransmitters.

Answer 4

Astrocytes

Question 5

______: are a type of macrophage (white blood cell) and are
usually stationary and monitor the health of nearby neurons.

Answer 5

Microglia

Question 6

__________ help hold nerve fibres together and form myelin
sheaths on axons in the CNS.

Answer 6

Oligodendrocytes

Question 7

____________: Extremely important because cells of the immune system are denied access to
the CNS.

Answer 7

Microglia

Question 8

____________: line the central cavities of the brain and spinal cord.

Answer 8

Ependymal cells

Question 9

Ependymal cells form a permeable barrier between the _______________ that
fills those cavities and the tissue fluid bathing the cells of the CNS.

Answer 9

cerebrospinal fluid

Question 10

____________ cells ______ help to circulate the CSF.

Answer 10

cilia

Ependymal cells

Question 11

________ are located only in the brain or spinal cord and

NOT outside of these two divisions of the CNS.

Answer 11

Interneurons

Question 12

Regeneration of neurons:

At the moment it is considered _____ in the CNS.

Answer 12

impossible

Question 13

Neurons do not repair here because there are no ________
cells in the CNS, and the outer __________ produced by
these cells is required for regeneration.

Answer 13

Schawnn

neurilemma