Multiple Choice
Which facial muscle is primarily used to whistle by compressing the cheeks against the teeth and aiding in blowing?
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10. Muscles
Muscle Actions
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The soleus, gastrocnemius, and the tibialis anterior are all major muscles of the lower leg. The gastrocnemius and the soleus are both located in the posterior region of the calf, while the tibialis anterior is located in the anterior region of the lower leg. Based only on this information, which statement do you think is most likely true?
A
The gastrocnemius and the soleus are antagonists.
B
The soleus and the tibialis anterior are synergists.
C
The tibialis anterior is a fixator for the gastrocnemius and the soleus.
D
The gastrocnemius and the tibialis anterior are antagonists.
Verified step by step guidance1
Identify the location and function of each muscle: The gastrocnemius and soleus are located in the posterior region of the calf and are primarily involved in plantar flexion of the foot. The tibialis anterior is located in the anterior region of the lower leg and is primarily involved in dorsiflexion of the foot.
Understand the concept of antagonistic muscles: Antagonistic muscles are pairs of muscles that work against each other to move a joint. When one muscle contracts, the other muscle relaxes, allowing for movement in opposite directions.
Analyze the actions of the muscles: The gastrocnemius and soleus muscles cause plantar flexion, which points the toes downward. The tibialis anterior causes dorsiflexion, which lifts the toes upward.
Determine the relationship between the muscles: Since the gastrocnemius and soleus perform the opposite action to the tibialis anterior, they are considered antagonists. This means they work against each other to control the movement of the foot.
Conclude that the statement 'The gastrocnemius and the tibialis anterior are antagonists' is most likely true based on their opposing actions in the movement of the foot.
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