Chapter 9

Question 0

Astrocytes provide a protection of the brain called _______

Answer 0

Blood brain barrier

Question 1

At a synapse the neuron that is sending the action potential is _____

Answer 1

Presynaptic

Question 2

This lines the cavities of the brain in the CNS ________

Answer 2

Ependymal

Question 3

Produces the myelin in the CNS ______

Answer 3

Oligodendrocytes

Question 4

Supports neurons in the ganglia _____

Answer 4

Satellite cells

Question 5

Star shaped and supports neurons in the CNS

Answer 5

Astorcytes

Question 6

Smallest size of the neuroglia

Answer 6

Microglia

Question 7

Forms neurolemma and myelin in PNS

Answer 7

Schwann cell

Question 8

3 functions of the nervous system

Answer 8

Sensory
Integrative
Motor

Question 9

The synaptic cleft is the space that a ________ crosses to initiate a response in a post synaptic neuron

Answer 9

Neurotransmitter

Question 10

What is the difference between a nerve and a tract

Answer 10

Nerve is in the PNS
Tract is in the CNS
Both are bundles of myelinated fibers

Question 11

The insulating material of a neuron in the PNS

Answer 11

Myelin

Question 12

Name 2 characteristics that would increase the speed of nerve transmission

Answer 12

1. Myelinated fibers

2. Larger diameter

Question 13

The body’s natural painkiller

Answer 13

Endorphins

Question 14

A neurotransmitter that helps regulate moods is

Answer 14

Serotonin

Question 15

The “fight or flight” nervous system is

Answer 15

Sympathetic

Question 16

Describe the arrangement of the gray and white matter in the spinal cord

Answer 16

Gray is in the inside part of the spinal cord, myelinated

White surrounds the outer part, myelinated

Question 17

Highly branched

Input part of the neuron

Answer 17

Dendrites

Question 18

Unmyelinated gap in the myelin sheath

Answer 18

Nodes of ranvier

Question 19

Bundle of many axons in the CNS

Answer 19

Tract

Question 20

Neuron that conveys information from a receptor to the CNS

Answer 20

Sensory

Question 21

Group of cell bodies in the CNS

Answer 21

Nucleus

Question 22

Neuron that conveys information from the CNS to an effector

Answer 22

Motor neuron

Question 23

Produces myelin sheath in PNS

Answer 23

Schwann cell

Question 24

Group of cell bodies in PNS

Answer 24

Ganglion

Question 25

Long, cylindrical process that conducts impulses toward another neuron

Answer 25

Axon

Question 26

The portion of the neuron containing the nucleus

Answer 26

Cell body

Question 27

Sac in which the neurotransmitter is stored

Answer 27

Synaptic vesicles

Question 28

Neuron located entirely within the CNS

Answer 28

Integration

Question 29

Substance used for communication at chemical synapses

Answer 29

Neurotransmitter

Question 30

Bundle of many axons in the PNS

Answer 30

Nerve

Question 31

Rounded structure at the distal end of an axon terminal

Answer 31

Synaptic end bulb

Question 32

This type of neuron take impulses to muscles

Answer 32

Motor neuron

Question 33

An axon carries an impulse _____ from a cell body

Answer 33

Away

Question 34

A neurotransmitter must cross the ______ to initiate an impulse in a postsynaptic neuron

Answer 34

Synaptic cleft

Question 35

A motor neuron is an example of afferent or efferent nerve?

Answer 35

Efferent

Question 36

A myelinated neuron appears what color

Answer 36

White

Question 37

Ms is more common in men or women

Answer 37

Women

Question 38

Membrane where inner an outer surfaces have equal amounts of electrical charge

Answer 38

Depolarized

Question 39

Membrane where inner an outer surfaces have unequal amounts of electrical charge

Answer 39

Polarized

Question 40

Time during which a neuron can't be stimulated to initiate an impulse

Answer 40

Refractory period

Question 41

Ions found in high concentration inside the plasma membrane

Answer 41

Potassium

Question 42

Ions found in high concentration outside the plasma membrane

Answer 42

Sodium

Question 43

The difference in electrical charge between the inside and outside of a plasma membrane

Answer 43

Resting potential

Question 44

The mechanism by which ions are moved through membrane from lesser to greater concentration

Answer 44

Sodium pump