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31 Cards in this Set
- Front
- Back
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Major parts of the nervous system |
Brain, spinal cord, and peripheral nerves |
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Structural unit of the nervous system |
Nerve or nerve cell |
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Connect with other neurons to receive information |
Dendrites |
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Conducts impulses away from the cell body |
axon |
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Junction in which one neuron is passed to another |
synapse |
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Special connective tissue membrane that covers the CNS and its three layers |
Meninges: Three layers Dura mater, pia mater, and arachnoid mater |
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Fluid that surrounds and supports the brain and spinal cord |
cerebrospinal fluid |
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Small part of brain, helps to maintain balance and coordination |
Cerebellum |
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Three parts of the brain |
midbrain, pons, and the medulla oblongata |
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Division of peripheral nervous system which involves visceral organs, glands, and blood vessels |
Autonomic nervous system |
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Division which involves nerves to the muscles and skin |
Somatic nervous system |
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Nerves originate in periphery and carry information to the CNS |
Afferent or sensory nerves |
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Neurons that carry impulses from the brain to muscles or glands |
Motor or efferent neurons |
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How many pairs of cervical nerves are there? |
8 |
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How many pairs of thoracic nerves are there? |
12 |
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How many pairs of lumbar? |
5 |
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How many sacral nerves? |
5 |
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Detect heat and cold? |
Thermoreceptors |
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Detect light |
Photoreceptors |
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Detect pain |
Nociceptors |
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Proprioceptors |
Mechanoreceptors |
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Respond to tissue damage and extreme stimuli |
Nociceptors |
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Ruffini end organs and Merkel disks |
Mechanoreceptors |
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Sense of smell and taste |
Chemoreceptors |
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Multibranched sensory nerve endings located in tendons where muscle fibers attach to tendon tissue |
Golgi tendon organs or GTO |
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Sense length and stretch or muscle and how far and fast the muscle is moving |
Flower type receptor |
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Consist of intrafusal muscle fibers, annulospiral and flower-type nerve receptors |
Spindle cells |
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Sensory nerves that record conscious sensations ie. heat, cold, pain and pressure |
Exteroceptors |
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Nerve pathway of the simplest form of nervous activity |
Reflex arc |
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Simplest form of nervous activity |
Reflex |
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All thought, association, and judgement take place |
Cerebral cortex |
