Lesson 4, Chapter 3

Question 1

Nerves

Answer 1

A bundle of neurons surrounded by a connective tissue

Question 2

Neruon

Answer 2

An individual nerve cell

Question 3

Endoneurium

Answer 3

The connective tissue that surrounds an individual neuron

Question 4

Fascicles

Answer 4

Bundles of neurons in a nerve

Question 5

Perineurium

Answer 5

The connective tissue that surrounds a fascicle

Question 6

Epineurium

Answer 6

The connective tissue that surrounds an entire nerve

Question 7

Sensory (afferent) neurons

Answer 7

Neurons that send nervous impulses into the central nervous system

Question 8

Motor (efferent) neurons

Answer 8

Neurons that send nervous impulses to muscles and glands

Question 9

Dorsal root

Answer 9

A group of sensory neurons that enter the back part of the spinal cord

Question 10

Ventral root

Answer 10

A group of motor neurons that leave the front part of the spinal cord

Question 11

Spinal nerve

Answer 11

A nerve, associated with the spinal cord, that contains both sensory and motor neurons

Question 12

Interneurons

Answer 12

Neurons that stay entirely within the brain and spinal cord

Question 13

Cell body

Answer 13

The structure in the neuron that contains the neuron’s nucleus and most of its cytoplasm

Question 14

Dendrites

Answer 14

Projections of the cell body that bring information into the neuron

Question 15

Axon

Answer 15

A single long projection of a neuron that transmits a nervous impulse

Question 16

Neurological cells

Answer 16

A general term for cells of the nervous system that aren’t neurons

Question 17

Schwann cells

Answer 17

Neuroglial cells that surrounds the axons of some neurons

Question 18

Myelin

Answer 18

A fatty substance that surrounds the axons of some neurons

Question 19

Nodes of Ranvier

Answer 19

Spaces in an axon that aren’t surrounded by myelin

Question 20

Oligodendrocytes

Answer 20

Neuroglial cells in the central nervous system that make myelin

Question 21

Astrocytes

Answer 21

Neuroglial cells in the central nervous system that from the blood-brain barrier

Question 22

Microglia cells

Answer 22

Neuroglial cells that kill bacteria and viruses in the brain and spinal cord

Question 23

Ependymal cells

Answer 23

Neuroglia cells that produce and circulate cerebral spinal fluid

Question 24

Cerebral spinal fluid

Answer 24

A fluid that bathes and cushions the brain and spinal cord