PACINIANCORPUSCLE FREE SCIENCE LESSONS VIDEO

• What is the structure that detects pressure in the skin called?

  Pacinian corpuscle
• What is the primary function of the Pacinian corpuscle?


  To act as a pressure receptor
• Where are Pacinian corpuscles primarily located?


  In the deep layers of the skin, fingertips, and soles of the feet
• What type of neuron is connected to sensory receptors like pressure receptors?


  Sensory neuron
• What happens when a sensory receptor detects a stimulus?


  Electrical impulses pass down the sensory neuron to the central nervous system
• What is the nervous impulse produced by the Pacinian corpuscle called?


  Generator potential
• How does the Pacinian corpuscle convert mechanical energy?


  It converts mechanical energy (pressure) into the energy of a nervous impulse
• What is the role of the connective tissue layers in the Pacinian corpuscle?


  They surround the sensory neuron ending
• What happens to the sodium ion channels in the Pacinian corpuscle when pressure is applied?


  The channels widen, allowing sodium ions to diffuse into the neuron
• What is the resting potential of a neuron?


  The inside of the membrane is negative with respect to the outside
• What is the effect of sodium ions diffusing into the neuron?


  The interior of the neuron becomes positively charged, leading to depolarization
• What is the term used for the wave of depolarization that passes down the sensory neuron?

  Action potential
• What will be discussed in the next video after this one?

  How rods and cones act as sensory receptors in the eye
• What are the key components of the Pacinian corpuscle's structure?


  • End of the sensory neuron
  • Many layers of connective tissue
  • Layers of gel between connective tissue layers
• How does the Pacinian corpuscle function as a transducer?


  • Converts mechanical energy (pressure) into nervous impulse energy
  • Generates a generator potential in response to pressure
  • Causes depolarization and action potential in sensory neurons