Cells and Tissues of the Nervous System

Question 1

What are the main components of the nervous system?

Answer 1

Central nervous system 
Peripheral nervous system 
Cranial and spinal nerves 
Motor division 
Autonomic nervous system

Question 2

What are neurons?

Answer 2

Excitable cells with multiple dendrites and one axon

Question 3

What type of loss in neurons is irreversible?

Answer 3

Cell body loss

Question 4

What are the different types of neuron?

Answer 4

Multipolar
Bipolar
Pseudounipolar

Question 5

What are glial cells?

Answer 5

Non-excitable supporting cells

Question 6

Describe the grey matter in the CNS

Answer 6

Diffuse collections of cell bodies and non-myelinated axons

Question 7

Describe the white matter in the CNS

Answer 7

Diffuse collections of myelinated axons

Question 8

If localised, what do collections of cell bodies and non-myelinated axons form in the CNS?

Answer 8

Nuclei

Question 9

If localised, what do collections of myelinated axons form in the CNS?

Answer 9

Tracts

Question 10

What do myelinated axons form in the PNS?

Answer 10

Nerves

Question 11

What do cell bodies form in the PNS?

Answer 11

Ganglia

Question 12

Where is CSF found?

Answer 12

Ventricles
Central canal of spinal cord
Surrounding brain and spinal cord between layers of meninges (between pia mater and arachnoid mater)

Question 13

Where is CSF formed?

Answer 13

Choroid plexus

Question 14

What is the blood-brain barrier?

Answer 14

Protective mechanism that helps to maintain a stable environment for the brain and prevents harmful amino acids and ions present in the bloodstream/cells from entering the brain

Question 15

Due to the blood-brain barrier, what properties do drugs need to have in order to be delivered to the CNS?

Answer 15

Lipid soluble

or use a suitable vector