Sensory, Motor and Intergrative System
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What are Sensory receptors?
a sensory nerve ending that responds to a stimulus in the internal or external environment of an organism
What is the structure of a sensory receptor?
- -Free nerve endings-bare dendrites
- -Encapsulated nerve endings-dendrites enclosed in a connective tissue capsule
- Separated cells-synapse in sensory neurons
- special senses
- Most Visceroceptors
Explain the locations of sensory receptors
Exteroceptors-at or near external surface of body, monitor external environments
Interoceptors-located in blood vessels, visceral organs, muscles and nervous system; monitor conditions in internal environment
Proprioceptors-in muscles, tendons, joints and inner ear; provide info about body position, muscle length, tension, and joint movements
What are the types of stimulus of sensory receptors?
- Mechanoreceptors-sensitive to mechanical stimuli
- Thermorecptors-detect new changes in temp
- Nociceptors-respond to painful stimuli(damage to tissue)
- Photoreceptors-detect light that strikes the retina of the eye
- Chemoreceptors-detet chemicals in mouth nose and body fluids
- Osmoreceptors-detect the osmotic pressure of body fluids
What is referred pain?
Pain that is felt at a site remote from the place of origin
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