Classification of Receptors: Location Externoceptors Located on the body surface or specialized to detect external stimu Pressure, pain, temp touch, etc Visceroceptor within internal organs, detect internal stimuli Blood pressure pain fullness · Proprioceptors Limb and body position and movement in the joints and muscles in the vestibular structures and the semicircular canals of the inner ear
Classification of Receptors: Location • Externoceptors – Located on the body surface or specialized to detect external stimuli – Pressure, pain, temp, touch, etc. • Visceroceptor – within internal organs, detect internal stimuli – Blood pressure, pain, fullness. • Proprioceptors – Limb and body position and movement. – in the joints and muscles – in the vestibular structures and the semicircular canals of the inner ear
Classification of Receptors: Modalities Mechanoceptive Detects stimuli which mechanically deform the receptor Pressure vibration touch sound Thermoceptive Detects changes in temperature, hot/cold Nociceptive(pain) Detects damage to the structures Photoreceptors Detect light; vision retinal of the eye Chemoceptive Detect chemical stimuli CO2 and O2 in the blood glucose, small, taste
Classification of Receptors: Modalities • Mechanoceptive – Detects stimuli which mechanically deform the receptor; – Pressure, vibration, touch, sound. • Thermoceptive – Detects changes in temperature; – hot/cold • Nociceptive (pain) – Detects damage to the structures • Photoreceptors – Detect light; vision, – retinal of the eye • Chemoceptive – Detect chemical stimuli – CO2 and O2 in the blood, glucose, small, taste
Classification of Receptors: Complexity · Simple receptors Usually a single modified dendrite General sense Touch, pressure, pain, vibration, temperature Complexi High modified dendrites. organized into complex structures ear eye pecial senses Vision, hearing, smell, taste
Classification of Receptors: Complexity • Simple receptors – Usually a single modified dendrite – General sense – Touch, pressure, pain, vibration, temperature • Complexity – High modified dendrites, organized into complex structures • ear, eye. – Special senses – Vision, hearing, smell, taste
口所 ELEGI5 Carotid body is Glossopharyngeal nerve Mechanoceptivel 出题优 Herings nerve Carotid body Thermoceptive Carotid sinus Vagus nerve Nociceptive(pain) Aortic baroreceptors Chemoceptive 0 Hail Textbook of Medical Physiology. by Saunders, an imprint of Elsevier, Inc. All rights reserved. Figure 18-5 The baroreceptor system for controling arterial pressure
Carotid Body is Mechanoceptive Thermoceptive Nociceptive (pain) Chemoceptive
Which receptor Receptors Cell membrane or Specialized cells or structures cytoplasmic receptor for the transduction of various proteins stimuli into electrical signals Central Peripheral receptors receptors Eyes(vision) Chemoreceptor(pH, gases, chemicals Osmoreceptor(osmolarity 像 Thermoreceptor(temperature) Ears(hearing equilibrium) Baroreceptor(pressure) Proprioceptor(body position) sme Other mechanoreceptors (pain, vibration, touch) Tongue(taste)
Which receptor?