Nervous system

Question 1

What is a nerve cell called?

Answer 1

Neuron

Question 2

What is a neuron?

Answer 2

Specialized for conduction. They send signals via a nervous impulse.

Question 3

What is the cell body of a neuron called ?

Answer 3

Perikaryon or soma

Question 4

CNS

Answer 4

Brain &spinal cord

Question 5

Astrocyte

Answer 5

supporting cell seen in the CNS

• Star shaped
• involved in the BBB

Question 6

Basket cells

Answer 6

A type of neuron seen in the cerebellum

Question 7

Neuroglia

Answer 7

• supporting cells in the CNS

- A.K.A glial cells or glia

Question 8

Schwann cells

Answer 8

Responsible for myelination of neurons in the PNS

Question 9

Ganglion

Answer 9

Collection of nerve cell bodies outside of the CNS

Question 10

Satellite cells

Answer 10

Found in the ganglia of the PNS

Question 11

Unipolar Neuron

Answer 11

• Has one process which branches off it
• a.k.a pseudo unipolar neuron
• sensory neurons

Question 12

Bipolar Neuron

Answer 12

• has one axon and many dendrites

- motor neurons and interneurons

Question 13

Interneurons

Answer 13

• Neurons between sensory and motor neurons

- a.k.a internuncial neurons

Question 14

Examples of Neuroglia

Answer 14

Astrocytes, ependymal cells, oligodendrocytes, and microglia

Question 15

What is the most abundant neuroglia?

Answer 15

Astrocytes

Question 16

Ependymal cells

Answer 16

-Line the ventricles and spinal Canal

Question 17

Oligodendrocytes

Answer 17

-Form myelin in the CNS

Question 18

Microglia

Answer 18

CNS macrophages

Question 19

Meninges

Answer 19

Three connective tissue covers which surround the brain and spinal cord.

Question 20

Meninges in order

Answer 20

Dura –> Arachnoid mater–> Pia Mater

Question 21

Dura Mater

Answer 21

• outer matrix

- composed of dense irregular connective tissue

Question 22

Dura Mater

Answer 22

• outer matrix

- composed of dense irregular connective tissue

Question 23

Arachnoid Mater

Answer 23

Made up of a delicate spider web like connective tissue

Question 24

Pia Mater

Answer 24

• innermost

- covers the brain intimately

Question 25

White matter

Answer 25

- myelinated nerve fibers | - outer portion of the spinal cord.

Question 26

Gray matter

Answer 26

- neuro cells bodies and associated dendrites or unmyelinated axons - The cortex - In conglomerations within the cerebrum and cerebellum where it is called nuclei. - central portion of the spinal cord in a butterfly shape.

Question 27

Nodes of Ranvier

Answer 27

Gaps that occur in the myelin sheath

Question 28

Neurofilaments

Answer 28

A type of intermediate filaments seen in neurons which provide rigidity

Question 29

What is the outer part of the brain called?

Answer 29

Cortex

Question 30

What is the conglomerations of gray mater deep within the cerebrum and cerebellum are called ?

Answer 30

Nuclei

Question 31

Where is CSF found?

Answer 31

In the subarachnoid space ( between the arachnoid and the Pia mater)

Question 32

What is the primary component of myelin?

Answer 32

lipid

Question 33

How is myelin formed?

Answer 33

It is formed by the cell wrapping itself around the axon.

Question 34

Endoneurium

Answer 34

Surrounds a nerve fiber

Question 35

What is myelin primarily ?

Answer 35

primarily the plasma membrane of either the Schwann cells (in the PNS) or the oligodendrocytes (in the CNS).

Question 36

Perineurium

Answer 36

Surrounds a bundle of nerve fibers

Question 37

Epineurium

Answer 37

Surrounds a nerve