CIE IGCSE Biology: 复习笔记:14.1.5 Sense Organs

CIE IGCSE Biology: 复习笔记:14.1.5 Sense Organs

Sense Organs as Receptors

 

  • Receptors are groups of specialised cells
  • They detect a change in the environment and stimulate electrical impulses in response
  • Sense organs contain groups of receptors that respond to specific stimuli

Sense Organs table, IGCSE & GCSE Biology revision notes

  • Once the receptor cell in the sense organ has been stimulated, it generates an electrical impulse
  • This is passed on to a sensory neurone which carries the impulse to the central nervous system
  • Here a response will be decided on and the impulse will be passed to a motor neurone (via a relay neurone)
  • The motor neurone carries the impulse to the effector (muscle or gland)
  • The effector carries out the response

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