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13 Cards in this Set
- Front
- Back
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Nociceptors |
Pain Receptor- very common In superficial portions of the skin, joint capsules, and around blood vessel walls. Not protected by accessory structures Two types of axons: Type A and C fibers |
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Thermoreceptors |
Temperature Receptor Free nerve endings located in the dermis, skeletal muscles, liver, and hypothalamus. Conducted along same pathways that carry pain sensation. |
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Mechanoreceptors |
Physical stimulation- sensitive to stimuli that distort their plasma membranes Contain mechanically gated ion channels who's gates open/close in response to stretching, compression, twisting, and other distortions. |
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Tactile Receptor |
1 of 3 classes of Mechanoreceptors Provide sensations of touch, pressure, and vibration |
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Baroreceptors |
1 of 3 classes of Mechanoreceptors Detect pressure changes in the walls of blood vessels and in portions of the digestive, reproductive, and urinary tracts. |
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Proprioceptors |
1 of 3 classes of Mechanoreceptors Monitor the positions of joints and muscles. The most structurally and functionally complex of general sensory receptors. |
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Chemoreceptors |
Chemical concentration- respond to water-soluble and lipid soluble substances dissolved in surrounding fluid. Receptors exhibit peripheral adaptation over period of seconds (central adaptation may occur) Receptors that monitor pH, carbon dioxide, and oxygen levels in blood. |
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Spinothalamic Pathway |
1 of 3 sensory pathways Provides conscious sensations of poorly localized "crude" touch, pressure, pain, and temperature |
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Posterior Column Pathway |
1 of 3 sensory pathways Carries sensations of highly localized "fine" touch, pressure, vibration, and proprioception. |
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Spinocerebellar Pathway |
1 of 3 sensory pathways Cerebellum receives proprioceptive information about position of skeletal muscles, tendons, and joints. |
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Corticospinal Pathway |
1 of 3 Somatic Motor Pathways |
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Medial Pathway |
1 of 3 Somatic Motor Pathways Trunk and proximal limb muscles |
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Lateral Pathway |
1 of 3 somatic Motor Pathways Distal limb muscles precise moves |
