EXERCISE 23 – GENERAL SENSATION OBJECTIVES1.To describe the function and location of various types of general sensory receptors.2.To define exteroceptor, interoceptor,and proprioceptor.3.To demonstrate the density and distribution of tactile and thermoreceptors in the skin.4.To define adaptation andnegative afterimage.5.To define referred pain andprojection.NOTES:I. Types of sensory receptors on the basis of location: exteroceptor/interoceptor/proprioceptor Define and give examples of each type.II. Types of general sensory receptors on the basis of stimulus:Tactile receptors(touch and pressure): •hair root plexuses in skin•Merkel disc in skin•Meissner’s corpuscle in the skin•Pacinian’s corpuscle in the skin•Ruffini’s corpuscle in the skin•Krause’s corpuscle in lips, tongue, and genitalsThermoreceptors (warm & cold receptors):•free nerve endings in the skin Pain receptors•free nerve endings in the bodyProprioceptors (muscle length and tension)•
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