Chapter 18

Chapter 18 - Chapter 18 General Sensation 1 Classification...

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Chapter 18 General Sensation 1
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Classification of Receptors l By origin of the stimuli ¡ Exteroceptors l Senses stimuli external to the body l Found close to the body surface l Touch, cutaneous pain, vision, hearing, smell,etc ¡ Interoceptors (visceroceptors) l Reacts to stimuli arising form within the body l Visceral pain, nausea, stretch, pressure 2
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Classification of Receptors ¡ Proprioceptors l Sense the position and movements of the body l Located in muscles, tendons and joints 3
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Classification of Receptors l According to the type of stimuli ¡ Thermoreceptors ¡ Mechanoreceptors l Physical deformation:vibration, touch, pressure, stretch, tension l Also hearing, balance l Located in skin, viscera, joints 4
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Classification of Receptors ¡ Chemoreceptors l Odor, taste ¡ Nociceptors l Tissue damage:trauma, ischemia ¡ Photoreceptors l Respond to light l Only in the eyes 5
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l Unencapsulated nerve endings ¡ Free nerve endings l Thermoreceptors:cold and warm receptors l Nociceptors l Most abundant in epithelia and connective tissues The general sensory receptors 6
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This note was uploaded on 01/06/2012 for the course BIOL 2401 taught by Professor Elainefanin during the Fall '11 term at Collins.

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Chapter 18 - Chapter 18 General Sensation 1 Classification...

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