MODULE 6 PNS Flashcards
this nerve is just sensory = smell
olfactory
this nerve is sensory only = vision
optic
nerve is motor only = movement of eye
oculomtor nerve
nerve is motor only = movement of eye
trochlear nerve
nerve sesnory for forehead, eye, upper jaw, lower jaw, and motor is muscles of mastication
trigeminal nerve - three divsion
this nerve is motor only - movement of eye
abducens
this nerve sensory is taste for 2/3 tongue, and motor is muscle of facial expression, tear and slaiveray glands
facial nerve
nerve is sensory only - for equilibrium and hearing
vestibulochlear nerve
this nerve is sensory innervation of phaynzy, tast posteropr 1/2, and motor = pharnzym nuscles, parasym inner of salivary galnds
glossopharyngeal nerve
this nerve sensory innervation of larynx, and motor is for phaynx and larynx muscles, innervatio thoracic and abdominal organs
vagus
this nerve is motor only - trapezius and sternocleidomastoid muscles
accessory nerve
muscle is only motor = muscles of tongue
– HYPOGLOSSAL NERVE
ANS aka the
visceral motor system
neuron has its cell body within the C NS. The axon enters into the P N Sand
travels to the autonomic ganglion.
The preganglionic
The ___is where the preganglionic and postganglionic neurons meet and
communicate. It is located in the P N S.
autonomic ganglion
The _____neuron is entirely in the P N S. Its cell body is in the autonomic ganglion, while
its axon travels to the target organ.
postganglionic
This gland produces tears, which keep the cornea, or outside surface of the eyeball, moist and clean.
lacrimal gland
The upper eyelid contains the ___muscle and orbicularis oculi muscle, which
control the opening and closing of the eyelid, respectively.
levator palpebrae superioris
of the eye this cavity is composed of the anterior and posterior chambers, both of which are filled with
aqueous humour (watery type fluid).
The anterior cavity
separates the anterior cavity of the eye from the posterior cavity.
The lens
The____ is the innermost layer of the eye which consists of the neural layer, optic disc,
macula, and C NI I(optic nerve). This layer is also known as the .
sensory tunic, retina
The vascular layer (the uveal tract) is the middle layer of the eye and is made up of the
choroid, the
ciliary body, and the iris.
The fibrous tunic is the outermost layer of the eye and has two portions located internally and
externally to the lens inc
sclera (white), and cornea(allow light transmission)
Small bones located in the middle ear.
ossicles
chamber in temporal bone
tympanic cavity
Areas at which the middle ear connects to the inner ear.
round and oval windows
Connects the middle ear to the nasopharynx.
Eustachian Tubes
The most lateral ossicle that is attached to and behind the tympanic membrane.
malleus - hammer
Sits between the malleus and the stapes.
incus, anvil
The stapes is the smallest bone and sits in the oval window. It is about one-third of the mass of the
other ossicles.
Stapes (Stirrup)
inner - Contains the receptors for equilibrium
vestibular apparatus
Contains the receptors for hearing. It looks like a seashell
cochlea
Both the cochlea and the vestibular apparatus are structured as two channels in the bone, called
labyrinths: the membranous and bony labyrinths.
The Semicircular Canals detect
The Utricle and Saccule are responsible for detecting
rotational movement., positional movement.
The cochlea contains the receptors for ___. A cross section of the cochlea reveals that this
structure is composed of three ducts:
hearing, the vestibular duct, the tympanic duct, and the cochlear duct.
The Organ of Corti is made up of ___________that rest on a basilar membrane. When
the membrane is moved by ______, the hair cells fire an impulse, which is sent to the via ____ for interpretation.
specialized cochlear hair cells, sound waves, brain via C N
V I I I
