chap 16-18 ?s

Question 1

T/F

A neurolemma is a characteristic of cells located in the PNS, but not in the CNS

Answer 1

true

Question 2

T/F

small openings in the roof of the 3rd ventricle allow passage of CSF into subarachnoid space

Answer 2

False

Question 3

A _____ refers to a small mass of nervous tissue, consisting primarily of neuron call bodies, outside of the brain and spinal cord

Answer 3

ganglion

Question 4

a schwann cell contributes to the myelin sheath of ___ axon

Answer 4

one

Question 5

description of dendrites

Answer 5

short and branched

Question 6

T/F

There are 2 types of neuroglia that produce myelin sheaths: oligondendrocytes and schwann cells

Answer 6

true

Question 7

motor neurons that supply skeletal muscles have cell bodies in _____ gray horns of the spinal cod and their axons exit the cord via _____ root

Answer 7

anterior (ventral)

anterior (ventral)

Question 8

Adult spinal cord extends from the _______ of the brain inferiority to the superior border of the ____ lumbar vertebra.

Answer 8

medulla oblongata; second

Question 9

T/F

except for T2-T12, all anterior (ventral) rami form nerve plexuses

Answer 9

true

Question 10

description of epidural space

Answer 10

contains a protective cushion of fat and CT

Question 11

choroid plexuses are specialized capillaries in the CNS

Answer 11

1 and 2

Question 12

cerebrospinal fluid is found between 2 layers of the meninges, space called subarachoid space

Answer 12

???????????

Question 13

structure of the neuron will contain the greatest number of neurotransmitter receptors

Answer 13

dendrites

Question 14

At a synapse between the axon of one neuron and the dendrite of another neuron, the axon would be part of a _____ neuron, the dendrite would be part of a ______ neuron

Answer 14

presynaphe; postsynaptic

Question 15

inferior extension of the pia mater that anchors the spinal cord to the coccyx is

Answer 15

filum terminale

Question 16

a synapse is a functional junction between

Answer 16

all

Question 17

flex your fingers, what impulse will flexor digitorum superficialis muscles need to recieve

Answer 17

efferent (motor)

Question 18

lateral gray horns are present in all segments of the ____ region of the spinal cord

Answer 18

thoracic

Question 19

spinal nerve T2-T12 different from all the other spinal nerves

Answer 19

anterior (ventral) rami do not contribute to a plexuses

Question 20

spinal cord is protected by

Answer 20

all

Question 21

circumventricular organs in the wall of the 3rd ventricle lock a blood-brain barrier

Answer 21

???????

Question 22

central canal of the spinal cord is located in the center

Answer 22

gray commissure

Question 23

description of satellite cells

Answer 23

surround cell bodies in peripheral nervous system ganglia

Question 24

T/F

anterior median fissure of the spinal cord is shallower and narrower than the posterior median sulcus

Answer 24

false

Question 25

efferent (motor)portion of the SNS

Answer 25

voluntary

Question 26

description of subarachnoid space

Answer 26

between arachnoid mater/ pia mater

Question 27

T/F | afferent (sensory) portion of the somatic nervous system carries senory info from the eyes and ears to CNS

Answer 27

true

Question 28

T/F | all segments of the spinal cord contain lateral, posterior (dorsal) and anterior (ventral) gray horns

Answer 28

false

Question 29

description of lipofuscin

Answer 29

accumulated as yellow-brown granules as the cell ages

Question 30

not an extension of dura mater

Answer 30

epidural space

Question 31

T/F | dendrites conduct signals toward the neuron cell body, the axon conducts nerve impluses away from the neuron cell body

Answer 31

true

Question 32

T/F neurons that originate in the CNS and that function to carry info to smooth, skeletal or cardiax mscle are efferent (motor) neurons

Answer 32

true

Question 33

All are functions of astrocytes except

Answer 33

synthesize neurotransmitters

Question 34

T/F | dermatome is an are of skin that provides sensory input to the CNS via one pair of spinal nerves of trigeminal (V) nerve

Answer 34

true

Question 35

description of nerve fibers

Answer 35

may refer to either an axon or dendrites

Question 36

sensory info only

Answer 36

posterior (dorsal) root

Question 37

multipolar neuron consists of: cell body, ____ and dendrites

Answer 37

axon

Question 38

what mater of spinal cord

Answer 38

contains increase (sensory) and decrease (motor) tracts

Question 39

one class of neroglial cells is cubodial to columnar arranged in a single layer that passes microvilli.....

Answer 39

ependymal cells

Question 40

description of astrocytes

Answer 40

help maintain blood-brain barrier

Question 41

T/F | oxygen, carbon dioxide, glucose and most anesthetice readily pass blood-brain barrier

Answer 41

true

Question 42

T/F | difference between neurons and neuroglia is that mature neuroglia can divide whereas mature neurons cant divide

Answer 42

true

Question 43

T/F denticulate ligaments and filum terminale are both structures that help to anchor spinal cord and protect it against sudden displacement

Answer 43

true

Question 44

description of an axon

Answer 44

carries nerve impulses toward another neruon, a muscle fiber or a gland cell

Question 45

following contains cell bodies of interneurons

Answer 45

posterior (dorsal) gray horn

Question 46

peripheral nerves are responsible for cutaneous sensation from the skin of the anterior abdominal wall as well as motor innervation to another abdominal wall muscle

Answer 46

intercostal nerve

Question 47

axon hilock is the part of a neuron

Answer 47

connects the axon to the neuron cell body

Question 48

a block of which nerve would provide anesthesia to lower teeth and chin

Answer 48

mandibular branch of the trigeminal nerve

Question 49

compared to unmyelinated axons, myelinated axons

Answer 49

1, 3 and 4

Question 50

neuroglic would be found in PNS

Answer 50

satelite cells

Question 51

2 principal divisions of the nervous system are the ___ and ____ nervous sytem

Answer 51

central and peripheral

Question 52

description pf the oligondendrocytes

Answer 52

form myelin sheaths in CNS

Question 53

stepping on a nail

Answer 53

afferent (sensory)

Question 54

cell type most sensory neurons

Answer 54

C

Question 55

neuroglia would be most responsible for helping to prevent pathogens and toxins from entering the brain from the blood

Answer 55

astrocytes

Question 56

dendrites are process of a neuron that

Answer 56

none

Question 57

blood- cerebrospinal fluid barrier

Answer 57

protects that neurons of the brain and spinal cord from potentially harmful substances in the blood

Question 58

description of nissl bodies

Answer 58

rough ER

Question 59

white mater includes

Answer 59

tracts in the spinal cord

Question 60

inability to control eyeball movemtn may indicate damage to

Answer 60

1, 3 and 5

Question 61

a nerve is a structure that may contain

Answer 61

1,2,4 and 5

Question 62

not a branch of the trigeminal (v) nerve

Answer 62

temporal

Question 63

bundle of axons in the CNS is called

Answer 63

tract

Question 64

T/F | most unipolar neurons are sensory neurons that transmit info along afferent pathways to the CNS

Answer 64

true

Question 65

description of neurotransmitter molecules

Answer 65

stored in synaptic vesicles

Question 66

false statement regarding oligodendrocytes

Answer 66

fluid filled ventricles of the brain

Question 67

oligodendrocytes contributes to the myelin sheaths

Answer 67

several

Question 68

false statements for spinal nerve

Answer 68

every paid of spinal nerves exits through the intervertbral foramina///

Question 69

2 basic functions of nervous system are sensory function, ____ function and motor function

Answer 69

integrative

Question 70

_____ (or motor) impulses travel from the ____ to the effectors (muscle or glands)

Answer 70

efferent; CNS

Question 71

T/F | neuroglia derived from monocytes are called astrocytes

Answer 71

false