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1.2 explain that the response to a stimulus involves: stimulus receptor messenger response

explain that the response to a stimulus involves:

  • stimulus
  • receptor
  • messenger
  • response

In order that a stimulus may produce a response, a receptor must detect the stimulus. A message must then be passed to a messenger, which may be a nerve or a hormone. The messenger then passes information to an effector, which may be a gland or a muscle, which responds to the information.

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