IB Biology:B3.3-Antagonistic Muscles & Titin in Muscle Relaxatio

Front

What is required for a bone to move in the opposite direction?

Back

A different muscle is needed to move it in the opposite direction.

Front

What are antagonistic muscles?

Back

Antagonistic muscles are paired muscles that produce movements in opposite directions. As one muscle contracts, the other relaxes.

Front

How are skeletal muscles attached to bones?

Back

Skeletal muscles are attached to bones by tough connective tissues called tendons, attaching to two bones, one at each end of the muscle.

Front

What is the role of the origin and insertion in muscle movement?

Back

One bone acts as an immovable anchor called the origin, while the other bone called the insertion moves as a result of the muscle contraction.

Front

What protein helps muscles with relaxation and how?

Back

The spring-like protein called titin helps with relaxation by connecting the end of myosin filaments to the Z-disc.

Front

What are the functions of titin?

Back

The functions of titin include holding the myosin filament in the correct position, preventing overstretching of the sarcomere, and adding to the force of contraction by releasing energy as it recoils.