Question

muscles that work opposite of each other are known as ______.
a. agonists
b. abductors
c. antagonists
d. adductors

Explanation:

To solve this, we analyze each option:

• Option a: Agonists are muscles that cause a movement, not those working opposite.
• Option b: Abductors move a body part away from the midline, not related to opposing action.
• Option c: Antagonists are muscles that work in opposition to agonists (or other muscles), producing the opposite movement.
• Option d: Adductors move a body part toward the midline, not about opposing action.

Answer:

c. antagonists