Skeletal Muscles In The Body

Given the previous information, apply that concept to how the 'Biceps Brachii' and 'Triceps Brachii' work with each other.

As one shortens, the other lengthens. For example, if the Biceps Brachii lengthens, the Triceps Brachii shortens.

Describe 'Reciprocal Inhibition'.

Reciprocal Inhibition is a process that inhibits the stretch reflex in antagonistic pairs of muscles. When one muscle contracts, it sends an inhibitory nerve impulses to its opposing muscle causing it to relax.

State the scientific/functional name for the abs.

Rectus Abdominis.

Describe how 'Skeletal Muscles' work/function.

Skeletal Muscles work across a joint and are attached to the bones by tendons. They work in pairs, each contracting or relaxing in turn to create movement.

Define the 'agonist'.

An agonist is the muscle doing the work (contracting) and creating movement.

Define the 'antagonist'.

An antagonist is the muscle which is relaxing and letting the movement take place.

Label the missing words: The points at which the tendons are attached to the bone are known as the _____1______ and the _____2______.

1- Origin 2- Insertion

State the origin and insertion of the 'Triceps Brachii'.

Origin- Scapula, Humerus Insertion- Ulna

Distinguish the difference between 'synergists' and 'stabilizers' and then provide an additional name they go by/can be called.

Synergists are other muscles that support the agonist in creating movements, and can also be referred to as "neutralizers". Stabilizers are muscles that stabilize other parts of the body during movement, and can also be referred to as "fixators".

Distinguish the difference between the 'origin' and 'insertion'.

The origin is where the tendon of the muscle joins the stationary bone(s), usually the more proximal attachment, and is usually the bone that stays fixed. The insertion is where the tendon of the muscle joins the moving bone(s), is usually the more distal attachment, and is usually the bone that moves.