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

Question

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

Quizplus · Accepted Answer

Inhibitory synapses in the spinal cord prevent extensor muscles from contracting at the same time as flexor muscles. These inhibitory synapses are part of the stretch reflex and help to maintain coordinated movements.

What Ordinarily Prevents Extensor Muscles from Contracting at the Same