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29 Cards in this Set
- Front
- Back
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Nervous system
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specialized for processing information and sending messages from one part of the body to another
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Central nervous system (CNS)
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consists of the brain and the spinal cord.
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Peripheral nervous system (PNS)
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consists of nerves.
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Neurons
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nerve cells that transmit impulses.
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Neuroglia
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support and nourish the neurons
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Cell body
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contains nucleus & other organelles.
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Dendrites
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receive signals from sensory receptors or other neurons.
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Axon (nerve fiber)
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conducts nerve impulses away from the cell body.
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Sensory neurons (afferent)
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take nerve impulses from a sensory receptor to the CNS.
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Interneurons
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sum up all the nerve impulses received then communicate with efferent neurons.
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Motor neurons (efferent)
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take nerve impulses away from the CNS to the effector
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Myelin Sheath:
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Made up of Schwann cells;
covering found on long axons; insulates; speeds impulse transmission |
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Spinal cord
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extends from the brain through the vertebral canal formed by the vertebrae
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frontal love
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primary motor area, logical thinking, Broca’s area
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temporal lobe
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primary auditory, smell, and speech
area (Wernicke’s area).
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parietal lobe
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primary somatosensory and taste area.
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occipital lobe
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primary visual area.
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hypothalamus
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essential for homeostasis (regulates hunger, thirst, sleep, body temperature, and water balance).
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thalamus
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integrates visual, auditory, taste, & somatosensory information and sends it on to the cerebrum.
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Cerebellum
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sensory motor cordination
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medulla oblongata
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controls many of life’s basic functions
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Reticular formation
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arouses the cerebrum to alertness.
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Limbic system
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join higher mental functions such as reasoning with more primitive feelings such as fear, pleasure, anger, etc.
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Peripheral nervous system
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nerves outside the CNS.
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Spinal nerves
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take impulses to and from the spinal cord.
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Cranial Nerves
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take impulses to and from the brain.
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autonomic neurons
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regulates activity of the cardiac and smooth muscles and the glands.
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Sympathetic
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coordinates the body for emergency or exercise
Speeds up metabolism. Speeds up heart rate |
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Parasympathetic
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brings about the responses we associate with a relaxed state.
Slows down metabolism. Slows down heart rate |
