Sensory Receptors

• Sensory Receptors

  • Specialised cells in nervous system
  • Detect energy changes (stimulus) in environment
  • Energy transducers: Convert energy change into electrical energy as nervous impulse
  • Pacinian Corpuscles:
  • Receptor in skin
  • Detects pressure changes
  • Oval-shaped structure with concentric rings of connective tissue wrapped around nerve cell end
  • Pressure change deforms connective tissue rings, push against nerve endings
  • Only sensitive to change not continuous pressure (stop responding)
• Receptors in Skin

  Label

  A) Epidermal

  B) Dermal

  C) Fatty

  D) Light Touch

  E) Light Pressure

  F) Pain

  G) Pressure

  H) Movement

  I) Vibration

  J) Cold

  K) Heat

  
• Pacinian Corpuscle

  Label

  A) Connective

  B) Gel

  C) Capsule

  D) Blood Capillary

  E) Sensory

  F) Axon

  G) Sensory

  H) Ending