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There is no single muscle.
Even in terms of a simple jab, there are many different muscles involved. To point out some of the basic muscles involved; the muscles around your hand and at the base of your forearm allow you to bunch your fingers into a fist, your triceps (at the back of your arm) extend your arm, your pectorals bring the arm across, and your deltoids around your shoulder provide strength and control, not to mention the many muscles around the torso allowing you to twist your body into the punch.
Isn't the human body just amazing?
What else can I help you with?
What does a muscle become when it contracts?
A muscle becomes shorter when it contracts.
Why does a boxer move his head backwards when his opponent throws a punch?
So his head doesn't get hit by the punch thrown by his opponent...
What happens to the length of a muscle when it contracts?
When a muscle contracts, it shortens in length.
When a muscle contracts how does its form change?
A muscle that contracts shortens whereas a muscle that relaxes lengthens.
When a muscle contracts, it pulls with what force?
When a muscle contracts, it pulls with a force generated by the muscle fibers contracting and shortening.
When one muscle contracts what happens to the opposing muscle?
When one muscle in a pair contracts the other expands.
When a muscle contracts it?
shortens
When the muscle contracts it is?
Flexion
When muscle contracts it is?
Flexion
Which muscles contracts when the leg is extended at the knee?
The muscle that contracts when the leg is extended at the knee is call the gastrocnemius muscle
When the muscle contracts what happens to the tendon and bone?
When the muscle contracts, the tendon pulls on the bone to create movement. The tendon is the connective tissue that attaches the muscle to the bone, so when the muscle contracts, it exerts force on the tendon, which in turn moves the bone.
What happens when the biceps muscle contracts?
When the bicep contracts the triceps relax
