When the Deltoid contracts the humerus abducts.
Points The toes
Quads
When the subscapularis muscle contracts concentrically, it performs internal rotation of the shoulder joint. This movement involves rotating the arm inward toward the midline of the body.
When the gluteus maximus contracts concentrically, hip extension occurs. This means the thigh moves backward, bringing the leg into alignment with the body.
When the bicep contracts the triceps relax
When a muscle contracts, it shortens in length.
right
It contracts.
It contracts
Points The toes
It contracts. solid