Sequences of Rhythmic Behavior, Such as Backward Walking in the Crayfish

question 7

Multiple Choice

Sequences of rhythmic behavior, such as backward walking in the crayfish and swimming in the leech, rely on

• A) the motor cortex section of the invertebrate brain.
• B) repeated activity of the environmental stimulus that triggers the response.
• C) specialized sensory receptors that detect body position.
• D) specialized circuits called central pattern generators.
• E) specialized motor neurons that innervate multiple muscle fibers.

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