CH49 - Chapter 49 Sensory and Motor Mechanisms Sensation...

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Chapter 49 Sensory and Motor Mechanisms Sensation and Perception Sensation : action potentials that reach the brain via sensory neurons Perception : constructions formed by the brain and do not exist outside of it – Examples: • Colors • Sounds • Smells • Tastes Sensory Reception • The detection of a stimulus by sensory cells – Leads to sensations and perceptions • Sensory Receptors – Mostly specialized neurons or epithelial cells – Often exist in groups in sensory organs • Eyes • Ears Sensory Receptors Exterorecpetors detect signals coming from outside the body – Examples: Light, heat pressure Interoreceptors detect stimuli coming from within the body – Examples: blood pressure, body position
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Sensory Receptors Mechanorecpetors Pressure Touch Stretch Motion Chemoreceptors General receptors that sense total solute concentration Specific Receptors that respond to specific kinds of molecules Glucose Oxygen
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CH49 - Chapter 49 Sensory and Motor Mechanisms Sensation...

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