Peripheral Nervous System. Homework Study for Jeopardy tomorrow!

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Peripheral Nervous System

Homework Study for Jeopardy tomorrow!

Sensory Division Cranial Nerves Openings in the skull Spinal Nerves Stimulate the rest of the body Sensory division of peripheral nervous system transmits impulses from sense organs to the central nervous system Can be categorized by what type of stimulus they respond to…

Sensory Receptors TypeResponds ToLocations ChemoreceptorChemicalsMouth, nose, blood vessels PhotoreceptorLightEyes MechanoreceptorsTouch, pressure, vibrations, and stretch Skin, hair, ears, ligaments, tendons ThermoreceptorsTemperature ChangesSkin, hypothalamus Pain ReceptorsTissue InjuryThroughout the body

Peripheral Nervous System Stimulus Sensory Receptors Sensory Neurons Central Nervous System

Cranial Nerves Stimulate regions of the brain 12 Cranial Nerves Olfactory Optic Oculomotor Trochlear Trigeminal Abducens Facial Auditory Glossopharyngeal Vagus Accessory Hypoglossal

Cranial Nerves Olfactory – Smell, identify familiar scents Optic – Snellen Test, pen light test Oculomotor – Raise and lower eyelids Trochlear – “Follow the finger” closer to face Trigeminal – Sensation on forehead and cheek Abducens – “Follow finger” in all directions

Cranial Nerve Facial Nerve – Smile, frown, raise eyebrow, puff cheeks Vestibulocochlear – Snap/rub fingers in their ears Glossopharyngeal – Stick out tongue Vagus – Ability to speak and swallow Accessory – Turn head left and right and against resistance Hypoglossal – Stick out tongue and move tongue side to side

Cranial Nerves NumNameTypeFunction IOlfactorySensorySmell IIOpticSensoryVision IIIOculomotorMotorElevation of eyelid IVTrochlearMotorUpward Eye rolling VTrigeminalMixedChewing, face sensation VIAbducensMotorLateral eye movement VIIFacialMixedTaste, smile, frown VIIIVestibulochochlearSensoryBalance, hearing IXGlossopharyngealMixedPharyngeal muscle, taste XVagusMixedGag reflex XIAccessoryMotorSCM muscle XIIHypoglossalMotorTongue Movement

Motor Receptors Motor Division of PNS transmits impulses from CNS to muscles or glands What is the chain of how a motor neuron responds to a stimulus?

PNS Cycle Stimulus Sensory receptors Sensory neuron Interneuron in Spinal cord Motor Neuron

Autonomic Nervous System Regulates involuntary activities When you run, the ANS speeds up heart rate, increases stimulation of sweat glands and slows down the digestive tract

Homework Study for Jeopardy tomorrow!

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