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Anatomy Ch. 9

Structure of the Nervous System

the human nervous system is formed of two components that work together to coordinate _________________. body functions
information from the environment is transmitted to the __________ by nerves of the PNS. CNS
within the _________, this information is integrated into a reflex or cognitively processed by the brain CNS
specialized regions of the brain interpret ______________information sensory
the brain uses sensory information to formulate a ________________ response
responses of the brain are channeled to the body through either the _______________ or the ________________nervous system autonomic, somatic
special sensroy receptors in the ___________ add to variety of environmental stimuli that the body recieves head
____________are bundles of neurons nerves
____________nerves carry sensory information afferent
____________nerves carry motor information Efferent
The __________ is composed of the brain and spinal cord CNS
the spinal cord corrdinates refleces and singals to and from the __________ brain
the _________ is composed of somatic nerves, autonomic nerves, and ganglia PNS
the autonomic nervous system is divided into the _______________ and _______________ nervous systems parasympathetic, sympathetic
the special senses are concentrated in the ___________ head
chemoreceptors on the tongue sense taste (______________) gustation
chemoreceptors in the nose sense smell (_____________) olfaction
Photoreceptors in teh retina of the eye sense light (_____________) vision
______________are color photoreceptors, and _________detect dim light cones, rods
neurons in the __________sense sound vibrations (hearing) cochlea
neurons in the semicircilar cancals and vestibule sense _____________ (equilibrium) position
aging is accompanied by some neuron loss in the _____________ brain
the ___________loses weight as a person matures CNS
most brain aging is due to loss of ______________ and decreased blood flow. myelinization
most people show a ____________ in complex brain functions as they age. decrease
________________ and ________________ compensate for neuron loss in the CNS plasticity, redundancy
sensory structure thresholds _____________ with age. increase
the nervous system develops from a dorsal cylinder of ectoderm called the ______________ neural tube
a_______________is a clump of nerve cell bodies covered by a sheath. they are found outside the CNS ganglion
_____________nerve tracts carry sensory information to the brain ascending
_____________nerve tracts carry motor information from the brain to the body descending
___________nerves are responsible for carrying sensory and motor information between the brain and the body spinal
the ______________nervous system is responsible for involuntary functions autonomic
the ______________nervous system is associated with voluntary functions somatic
humans have _______pairs of cranial nerves and _______pairs of spinal nerves 12, 31
Nerve cell bodies are most likely found in the: ____________ gray matter of the spinal cord
the innermost layer of the menings is the ____________ pia mater
cerebrospinal fluid is found in the ___________________ ventricles
Created by: Lauren G.



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