What Ordinarily Prevents Extensor Muscles from Contracting at the Same

question 44

Multiple Choice

 What ordinarily prevents extensor muscles from contracting at the same time as flexor muscles?

• A) The ligaments and tendons that bind them together
• B) Learned patterns of coordination in the cerebral cortex
• C) Inhibitory synapses in the spinal cord
• D) Control of both muscles by different branches of the same axon

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