Lab 9

Question 1

Properties of Neuroglia that neurons don’t have

Answer 1

They don’t form/ don’t have synapses, can divide, less excitable

Question 2

% of cells in CNS that are neuroglia

Answer 2

80-90

Question 3

Microglia cells

Answer 3

Immune cells of CNS, clean up crew

Question 4

Ependymal cells

Answer 4

Produce and circulate cerebral spinal fluid in spaces around brain/spinal cord

Question 5

Oligodendrocytes

Answer 5

Produce myelin in CNS

Question 6

Astrocytes

Answer 6

Support directly, provide physical barrier between cells, maintain ionic equilibrium of ECM, modify chemical environment of neighboring cells

Question 7

Multipolar neuron

Answer 7

Dendrites coming directly off cell body, axon extending normally
Example: motor neuron

Question 8

Bipolar neuron

Answer 8

Cell body in the middle and long extensions from either side reaching to the dendrites and axon
Example: olfactory and retinal

Question 9

Unipolar neuron

Answer 9

Cell body is a central extension off a long axon. Axon has receptive and terminating Ends on either side.
Example: dorsal root ganglion cell

Question 10

What is in the white matter of spinal cord

Answer 10

Myelinated axons

Question 11

Somatic sensory neuron

Answer 11

Afferent,
Skin, fascia, joints, muscles

Question 12

Visceral sensory neuron

Answer 12

Afferent
Internal organs

Question 13

Autonomic motor neuron

Answer 13

Efferent
Involuntary nervous system
Smooth and cardiac muscle

Question 14

Somatic motor neuron

Answer 14

Efferent
Voluntary skeletal muscles

Question 15

Endoneurium

Answer 15

Connective tissues covering of a single neural axon in a nerve

Question 16

Perineurium

Answer 16

Connective tissue lining covering a bundle of neurons. Together forms a fascicle

Question 17

Epineurium

Answer 17

Connective tissue covering of many fascicles and blood vessels

Question 18

Prosencephalon

Answer 18

Forebrain. Turns into cerebrum and diencephalon

Question 19

Mesencephalon

Answer 19

Midbrain. Turns into brain stem

Question 20

Rhombencephalon

Answer 20

Hind brain. Turns into cerebellum, pins and medulla oblongata of brain stem and spinal cord

Question 21

Cranial nerve 1

Answer 21

Olfactory
Afferent
Tissue: Nose
Smell

Question 22

Cranial nerve 2

Answer 22

Optic
Afferent
Tissue: Retina
Vision

Question 23

Cranial nerve 3

Answer 23

Oculomotor
Efferent
Tissue: eye ball
Control eye movement

Question 24

Cranial nerve 4

Answer 24

Trochlear
Efferent
Tissue: superior oblique
Moves eyeball

Question 25

Cranial nerve 5

Answer 25

Trigeminal
Mixed
Tissue: face
Sensory nerve of face, provides sensation

Question 26

Cranial nerve 6

Answer 26

Abducens
Efferent
Tissue: lateral recurs muscle
Abducts eyeball

Question 27

Cranial nerve 7

Answer 27

Facial
Mixed
Tissue: middle ear, nasal cavity, lacrimal, submandibular
Control facial movement and expression

Question 28

Cranial nerve 8

Answer 28

Vestibulocochlear
Mostly sensory (Afferent)
Tissue: ear
Hearing and balance

Question 29

Cranial nerve 9

Answer 29

Glossopharyngeal
Mixed
Pharyngeal muscles
Swallowing

Question 30

Cranial nerve 10

Answer 30

Vagus
Mixed
Parasympathetic nervous system
Controls major bodily functions (involuntary)

Question 31

Cranial nerve 11

Answer 31

Accessory
Efferent
Muscle of sternonucleidomastoid and trapezius
Controls head movement

Question 32

Cranial nerve 12

Answer 32

Hypoglossal
Efferent
Tongue
Motor neuron that controls speech and swallowing