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Anatomy > Peripheral Nervous System > Flashcards

Peripheral Nervous System Flashcards

1
Q

SENSORY RECEPTOR

A

Specialized to respond to changes
(stimulus) in environment

Need to read____
• Generate graded potentials that trigger action
potentials in sensory nerves (called transduction)
• Sensation (awareness of stimulus) and Perception
(interpretation of stimuli) occur in brain
• 1 sensory neuron only carries info for 1 sensation
• Sensory receptor classification based on
• Stimulus detected
• Location of activating stimulus
• Structural complexity

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2
Q

respond to touch, pressure, stretch (also hearing and balance)

A

Mechanoreceptors

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3
Q

respond to temp changes

A

Thermoreceptors

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4
Q

respond to light energy

A

Photoreceptors

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5
Q

respond to chemicals in solution (taste, smell, oxygen)

A

Chemoreceptors

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6
Q

respond to pain

A

Nociceptors

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7
Q

respond to pressure and stretch; found in blood vessels: carotid arteries and aortic arch

A

Baroreceptors

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8
Q

respond to stimuli outside body so near
body surface
• Includes touch, pain, pressure, temperature and
special senses

A

Exteroceptors

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9
Q

respond to stimuli inside body (organs

and blood vessels)

A

Interoceptors

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10
Q

Monitors stretching of skeletal muscles for body

movement awareness

A

Proprioceptors

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11
Q

modified dendrite endings
• Free nerve endings
• Found mostly in epithelia or connective tissue
• Detect pain and extreme temperature

A

General receptors

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12
Q

Encapsulated endings
• Have connective tissue cap enclosing dendrite endings
• All are mechanoreceptors
• Found in skin, skeletal muscles, joints, tendon

A

General receptors

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13
Q

localized collections of different cells working
together to collect sensory data
• Include smell, taste, vision, hearing and balance

A

Special receptors

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14
Q

Bundles of axons covered by connective

tissue

A

NERVE COVERINGS

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15
Q

surrounds bundles of fascicles to form

nerve

A

Epineurium

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16
Q

surrounds bundles of axons

fascicles

A

Perineurium

17
Q

surrounds axon (fiber)

A

Endoneurium

18
Q 
motor neuron (Lisa Simpson 
Model: single axon, multiple dendrites)
A

Multipolar

19
Q 
motor neuron (Lisa Simpson 
Model: single axon, multiple dendrites)
A

Bipolar

20
Q

sensory neurons: touch and
stretch (hanger shape: one end dendrite, one end
axon terminal)

A

Unipolar

21
Q

• Cranial – 12 pairs from brain

A

NERVES

22
Q

sensory nerve for smell

A

I – Olfactory

23
Q

sensory nerve for vision

A

II – Optic

24
Q

motor for eye muscles and eyelid;

pupillary constriction; muscles to the lens

A

III – Oculomotor

25
Q

motor for eye muscles

A

IV – Trochlea

26
Q

largest nerve – mixed
• Sensory (touch, pain and temperature) to face
• Motor to mastication muscles (3 branches –
opthalmic, maxillary and mandibular)

A

V- Trigeminal

27
Q

motor for eye muscles

A

VI – Abducens

28
Q

mixed nerve
• Sensory – taste sensations anterior 2/3 of tongue
• Motor – facial expression, salivary and lacrimal glands (autonomic)

A

VII – Facial

29
Q

mixed
• Sensory - hearing and balance (dominant)
• Very little motor – modifies hair cells

A

VIII - Vestibulocochlear

29
Q

mixed
• Sensory - hearing and balance (dominant)
• Very little motor – modifies hair cells

A

VIII - Vestibulocochlear

30
Q

mixed nerve
• Sensory – taste to posterior 1/3 of tongue; somatic sensations (touch, temp) from pharynx and tongue, monitors blood pressure, O2 and CO2 levels in carotid arteries
• Motor – elevates pharynx during swallowing; motor to parotid glands

A

Glossopharyngeal

31
Q

mixed nerve –only one to extend past
shoulders

• Sensory – taste to epiglottis; somatic sensation from
epiglottis and pharynx, monitors blood pressure and
O2 and CO2 levels for respiration rate in aortic arch,
monitors organs in thorax and abdomen
• Motor – swallowing, coughing, voice production,
peristalsis, slows heart rate

A

X – Vagus

32
Q 
motor nerve for moving shoulders 
and head (SCM and trapezius)
A

XI – Accessory

33
Q

motor nerve for tongue

movement (speech)

A

XII – Hypoglossal

Anatomy (11 decks)

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