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Type: Multiple-Choice
Category: Nervous and Endocrine Systems
Level: Grade 9
Author: MelissaLogan
Last Modified: 7 years ago

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Nervous and Endocrine Systems Question

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Grade 9 Nervous and Endocrine Systems

What are receptors?
  1. special cells that detect stimuli
  2. glands that produce hormones
  3. the spaces between two neurons
  4. the nerve pathways operating in a reflex action