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24 Cards in this Set
- Front
- Back
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What are two systems that control our bodies? How are they different?
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1. Nervous system: transmits info. repidly by nerve impulses
2. Endocrine system: transmits info. more slowly by chemicals secreted by ductless glands into the bloodstream. |
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What are the 4 primary organs in the nervous system?
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1. Brain/spinal cord
2. Nerves 3. eyes and ears 4. microscopic sense organs |
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What are the 4 primary lobes in the brain?
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1. Frontal
2. Parietal 3. Occipital 4. Temporal |
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What is the function of the frontal lobe?
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Motor area:
- speech - muscle coordination |
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Funtions of the Parietal lobe?
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Visual cortex
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Functions of occipital lobe?
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Understanding images, comprehension
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Functions of temporal lobe?
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Interpreting sounds and signals from the ear
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What is the cerebrum?
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-Largest part of the brain
-Mental processing |
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Where is teh Hypothalmus, function?
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- Relay station
- Below thalmus - Connection b/t nervous and endocrine system |
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What is the midbrains function?
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- Relay station
- Visual/auditory impulses |
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Funtion and location of Thalmus?
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- Relay station
- Produces sensations |
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What is the most common brain/nervous system disorder?
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1. hearing loss
2. Depressive disorders |
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What are the 3 main parts of a neuron?
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- Cell body
- Axon - Dendrites |
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what are 3 types of neurons?
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- Sensory
- Motor - Interneurons |
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Myelin is found in what? Primary funtions are?
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1. Found in Periphial nerves
2. Functions - insulate - transmit electrical signals along the axon |
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What are Glial Cells?
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- Specialized connective tissues
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What are the 3 types of Glial cells?
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1. Astrocyte
2. Microglia 3. Oligodendroglia |
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What is the function of an Astrocyte?
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Branches attach neurons to blood vessels
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Function of Microglia?
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-Draw microbes into cytoplasm and digest them
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Function of Oligodendroglia?
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- Produce Myelin
- Hold nerve fibers together |
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Define Synapse?
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A space separating the axon from the dendrites
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Define a presynaptic neuron?
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neuron situated proximal to a synapse
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Define a postsynaptic neuron?
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neuron situated distal to a synapse
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What is a neurotransmitter?
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Chemicals by which neurons communicate
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