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