Muscle contraction

Front

What is necessary for the myosin to release the actin?

Back

ATP

Front

What does the myosin do to the actin?

Back

Pulls on it

Front

What is a crossbridge?

Back

Where myosin binds to actin

Front

What does calcium do to the actin?

Back

Uncovers myosin binding sites

Front

What is the name of the protein that covers the binding sites on actin?

Back

Tropomyosin

Front

What does the sarcoplasmic reticulum do?

Back

Stores calcium

Front

What is the name of the place where a nerve meets a muscle fiber?

Back

Neuromuscular junction

Front

How does the sarcomere shorten (contract) ?

Back

The actin is pulled by the myosin

Front

When a muscle is in a contracted position, what is the relationship between actin filaments?

Back

They are close to each other

Front

When a muscle is relaxed and in a lengthened position, what is the relationship between actin filaments?

Back

They are far apart from each other