Which two muscles act antagonistically?
A) tibialis anterior; fibularis longus
B) flexor digitorum longus; gastrocnemius
C) gastrocnemius; soleus
D) extensor digitorum longus; flexor digitorum longus
D
Explanation:
A) Both the tibialis anterior and fibularis longus flex the foot. Thus, these two muscles work synergistically, not antagonistically.
B) The extensor digitorum longus extends the digits while the flexor digitorum longus flexes the digits. Thus, these two muscles act antagonistically. The gastrocnemius extends the foot.
C) Both the gastrocnemius and soleus extend the foot. Thus, these two muscles work synergistically, not antagonistically.
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