sensory

• sense organs and receptors cells detect stimuli in internal/external environment
• Chemoreceptor:

  • responds to chemical changes in taste and smell and in internal changes
• Thermoreceptors:

  respond to temperature changes
• Mechanoreceptors:

  responds to physical forces in touch hearing and pressure
• Nociceptors:

  responds to tissue damage (pain)
• proprioceptors:

  responds to the body position of skeletal muscles, tendons, ligaments, and joints
• Most sense organs are close to brain so that information can get to brain quickly
• Stimulus:

  chemical/physical changes in the interna/external environment, capable of causing a response, they are picked up by sensory receptors
• Internal stimulus

  • feeling hungry
  • ingesting bad food
  • needing to sneeze and urinate
  • fatigue
• external stimulus:

  • hot stove (touch), loud sound (hear)
  • fight - organisms natural response to fight when scared
  • flight - natural response to run away from fear and dnager
  • temperature