Question

interactions of skeletal muscles in the body
muscles cant push - they can only pull as they contract - so most often body movements result from two or more muscles acting together or (1.) each other. muscles are arranged so that whatever one muscle (or group of muscles) can do, other muscles can reverse. in general, groups of muscles that produce (2.) movements lie on opposite sides of a joint (figure 6.14). because of this arrangement, muscles are able to bring about an immense variety of movements.
the muscle that has the major responsibility for causing a particular (3.) is called the prime mover. muscles that oppose or reverse a movement are antagonists (an - tago - nists). when a prime mover is active, its (4.) is stretched and relaxed. antagonists can be prime movers in their own right. for example, the biceps brachii and brachialis muscles of the arm (prime movers of elbow flexion) are antagonized by the (5.) brachii (a prime mover of elbow extension).
o 1. against 2. opposite 3. movement 4. antagonist 5. triceps
o 1. movement 2. antagonist 3. triceps 4. against 5. opposite
o 1. antagonist 2. triceps 3. against 4. opposite 5. movement
o 1. opposite 2. movement 3. antagonist 4. triceps 5. against
o 1. triceps 2. against 3. opposite 4. movement 5. antagonist

Explanation:

Muscles act together or against each other for movement. Opposite - movement muscles are on opposite sides of a joint. The prime - mover causes a particular movement and its antagonist is stretched when it's active. The triceps is an antagonist to biceps and brachialis for elbow movements.

Answer:

1. against 2. opposite 3. movement 4. antagonist 5. triceps