The opposite of flexing a muscle is called the muscle.

The opposing muscle of a flexor is called the "extensor" muscle. Your triceps is an extensor.

Explanation:

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The opposing muscle of a flexor is called the "extensor" muscle. When you contract your triceps your arm straightens and the angle between the forearm and the upper arm increases.

Explanation:

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metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !