Muscles & Muscle Contraction

Front

What attaches bones to each other at joints?

Back

Ligament

Front

What is the length between Z-lines of an actin molecule called?

Back

Sarcomere

Front

What type of muscles are smooth muscle and cardiac muscle considered?

Back

Involuntary

Front

What attaches to actin to form the cross bridge?

Back

Myosin

Front

What is the sarcoplasmic reticulum?

Back

A specialized endoplasmic reticulum in muscle cells that stores calcium ions.

Front

What is the function of troponin in muscle contraction?

Back

Troponin binds to calcium ions and helps regulate muscle contraction.

Front

What is the role of tropomyosin in muscle contraction?

Back

Tropomyosin blocks the myosin binding sites on actin in a relaxed muscle.

Front

What is the basic unit of muscle contraction?

Back

Sarcomere

Front

What type of muscle is under voluntary control?

Back

Skeletal muscle

Front

What is the function of myofibrils?

Back

Myofibrils are the contractile threads found in striated muscle cells.