Chapter 8

Question 1

divisions of the CNS

Answer 1

Brain and spinal cord

Question 2

Divisions of the brain

Answer 2

Cerebrum
Cerebellum
brain stem
Diencephalon

Question 3

Cerebrum

Answer 3

Motor function and sensory data
- largest division
-memory and Intelligence

Question 4

Cerebellum

Answer 4

muscle coordination and balance

Question 5

Brain Stem

Answer 5

medulla, pons and mid brain
medulla- regulated temp heart beat, BP

Question 6

Diencephalon

Answer 6

thalamus and hypothalamus

• links our nerves to the endocrine system

Question 7

PNS

Answer 7

On the outside, all nerves are a part of the PNS

Question 8

Divisions of the PNS

Answer 8

-Somatic
- Voluntary actions
-Autonomic
-No conscious control

• Sympathetic
  
  • Fight or flight
    - Stops salivary glands
• Parasympathetic
  - Rest and digest
  - Salivary glands activated

Question 9

Neuron

Answer 9

nerve cell

Question 10

Dendrites

Answer 10

Receptors, pick up signal from other cells

Question 11

Axon

Answer 11

Sends the signals down the neuron

Question 12

Myelin sheath

Answer 12

Insulates the axon

Question 13

Schwann cells

Answer 13

Sections of the axon that are insulated

Question 14

Nodes of ranvier

Answer 14

In between the Schwann cels

Question 15

Nerve

Answer 15

bundle of neurons

Question 16

Synapse

Answer 16

Junction between two neurons

Question 17

Ganglion

Answer 17

collection of nerve cell body that sits outside the CNS

Question 18

Cranial nerves

Answer 18

I – OLFACTORY
II – OPTIC
III – OCULOMOTOR
IV – TROCHLEAR
V – TRIGEMINAL
VI – ABDUCENS
VII – FACIAL
VIII – VESTIBULOCOCHLEAR
IX – GLOSSOPHARYNGEAL
X – VAGUS
XI – ACCESSORY
XII - HYPOGLOSSAL

Question 19

Olfactory I

Answer 19

carries odor from the nose to the brain

Sensory
Afferent

Question 20

Optic II

Answer 20

Carries visual information from the eye to the brain

sensory
Afferent

Question 21

Oculomotor III

Answer 21

contracts muscles of the eye

Motor
Efferent

Question 22

Trochlear IV

Answer 22

motor, efferent
contracts the superior oblique muscles of the eye

Question 23

Trigeminal V

Answer 23

Motor and sensory

largest cranial nerve

3 divisons
- V1: ophthalmic
- Afferent
- intervals forehead, eyelids, nose, lacrimal glands
-V2: maxillary
- Afferent
Intervates: Infraorbital, ASA, MSA, PSA, greater & lesser palatine, nasopalatine
-V3: mandibular
- Sensory and motor
- largest trigeminal branch
- Intervates muscles of mastication

Question 24

Abducens VI

Answer 24

motor
Moves lateral muscles of the eyeball

Question 25

Facial VII

Answer 25

sensory and motor

Motor: facial expression muscles
Sensory: Taste from anterior portion of the tongue
Parasympathetic: sub mandibular and sub lingual glands; lacrimal gland

Question 26

Vestibulocohlear VIII

Answer 26

Sensory
Provides hearing and balance

Question 27

Glossopharyngeal IX

Answer 27

Sensory and motor
- posterior 1/3 of tongue. parotid, and pharynx

• related to gag reflex

Question 28

Vagus X

Answer 28

Sensory and motor

intervals the pharynx region and organs in the chest and abdomen

Question 29

Accessory XI

Answer 29

Motor
- Travels through the trapezius, SCM, Etc

Question 30

Hypoglossal

Answer 30

motor
- motor supply for intrinsic and extrinsic muscles of the tongue