Flashcards in Anatomy- The peripheral Nervous Sytem & Reflex Activity Deck (34):
Sensory Receptors: Thermoreceptors
Response to temperature change.
Sensory Receptors: photoreceptors
Respond to light energy
Sensory receptors: Chemoreceptors
Respond to chemicals in solution(molecules smelled, tasted, change in blood pH)
Sensory Receptors: noicereceptors
Respond to pain from potentially damaging stimulus.
Sensitive to stimuli arising outside body(touch, pressure, pain)
a sensory receptor that detects stimulus within the body.
Example: Blood Pressure
Respond to internal stimuli in skeletal muscle, tendons, joints
Cordlike organ of PNS consisting of bundles of axons enclosed in layers of connective tissue
Carry impulses toward CNS
Carries impulses away from CNS
Contains both motor and sensory
Peripheral nerves can be classified as____ or ______
Spinal nerves r or cranial nerves
Collections of neuron cell bodies associated with nerves in PNS
Sensory Receptors: Mechanoreceptors
Respond to touch, pressure(including blood pressure), vibration, stretch and itch.
Cranial Nerve: I.
I. Olfactory- purely sensory(associated with sense of smell)
Cranial Nerve: II
II. Optic Nerve
Sensory- deals with vision
Cranial Nerve: III
- Motor- eye movement
Cranial Nerve: IV
Turns eye downward and laterally
Cranial Nerve V:
chewing face, mouth, touch & pain
Cranial Nerve VI.
Turns eyes laterally
Cranial Nerve VII:
- both -
most facial expressions
secretion of tears & saliva
Cranial Nerve: VIII.
Cranial Nerve: IX
- mixed- (taste, tongue, tonsil,muscles for swallowing)
Cranial Nerve: X
aortic blood pressure
slows heart rate ,stimulates digestive organs,
Cranial Nerve: XI
controls trapezius & sternocleidomastoid
controls swallowing movements
Cranial nerve: XII
-controls tongue movements
Spinal Nerves: how many pairs?
Cranial Nerves C1-C5;supplies skin and muscles of head, neck, shoulders and chest.
Cranial nerves C5-T1
Supplies shoulders & upper limbs
Lower limb, breaches to pelvis, abdomen, & buttocks.
Spinal nerves L1-L4, supplies buttocks and lower limbs
Spinal Nerves S4-Co Serves the coccyx bone
Reflexes: Somatic reflexes
Lead to contraction of skeletal muscles.