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24 Cards in this Set
- Front
- Back
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Neurons
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specialized cells
conduct impulses through nervous system have 3 major parts:cell body dendrites and axon |
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Cell Body
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contains nucleus
carries out metabolic function |
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Dendrites
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branchlike extensions
receives impulses from other neurons |
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Axon
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Slender,tail like extensions
transmit impulse to dedrites or cell body of other neurons,muscles or glands |
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Neurotransmitters
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chemicla that is released into synaptic cleft from the on terminal a sending neuron
crosses the synapse binds to receptor |
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Central Nervous System
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Brain and Spinal Cord
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Spinal Cord
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Extension of the brain
Extends from the brain through teh hollow spinal column center Protected by spinal fluid and bone Transmait messages b/t brain and periphial nervous system |
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Brain
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Made up of hindbrain,midbrain and forebrain
Has two hemispheres Has four lobes |
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Brain Lobes
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Frontal
Parietal Ocipital Temporal |
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Frontal Lobe
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Largest lobe
Contains motor cortex Frontal association area Located in front Right controld left;left controls right |
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Parietal Lobe
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Located behind frontal lobes
Somatosensory cortex |
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Occipital Lobe
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Located behind pareital lobe
Contains primary visual cortex Reception and interpertation visual stimuli Visual memory |
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Temporal Lobe
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Located slightly above ears
Primary audiotory cortex Reception and interpertation of sound Wernickes area |
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Right Hemisphere
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Controls left side of body
Visual spatial relationship Audiotory cortex Emotional thinking Non verbal language |
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Left Hemisphere
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Controls right side of body
Spoken and written language Numerical skills Sense self and well being |
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Phineas Gage
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Rod stuck in head
After removal had mood swings,personality chaneg and didn't want to work Damage of frontal lobe |
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Periphial Nervous System
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Nerves that connect CNS to rest of body
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Somatic Nervous System
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Sensory nerves:transmit info from sensory receptors(eyes,ears,nose,tongue,skin)
Motor nerves:relay messages from CNS to skeletal muscles Primarily concious control |
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Autonomic Nervous System
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Transmits messages b/t CNS and glands,heart,and smooth muscles(arteries,gastrointestinal)
Controlled without concious awareness |
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Autonomic Nervous Systems:2 parts
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Sympathetic and parasympathetic
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Sympathetic
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Handles emergencies,stress
Flight or fight response |
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Parasympathetic
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Brings body back to normal after an emergency/stress
Balanced functionong important for survival |
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Endocrine System
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Series of ductless glands located in various parts of bosy,manufactures hormones
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Hormones
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Manufactured and released in one part of bosy but effect other parts
Travel through blood stream Perform job only on cells that have receptors Some neurotransmaitters act as hormones |
