Skeletal Muscle Structure

What is the name of the contractile unit in a muscle cell?

• fascicle
• sarcomere
• tendon
• endomysium

The plasma membrane of a skeletal muscle cell is called the:

• sarcomere
• myofilament
• sarcolemma
• sarcoplasm

What is the structure that stores the Calcium in the muscle cell.  

• Sarcoplasm
• Sarcolemma
• Sarcoplasmic Reticulum
• Myoglobin

What are thick filaments known as?

• Cross Bridges

• Myosin

• Light Band

• Actin

The Light I Band consists of... 

• Myosin filaments only
• Actin filaments only
• Myosin and actin filaments
• none of the above

Fill-in-the-blank! Muscle, Fascicle, _____, Myofibril

• Muscle fiber
• Myofilament
• Sarcomere
• Actin 

Actin filaments our bound to the edges of the sarcomere, also known as the...

• M-Line
• H-Zone
• Z-Disc
• A-Band

Scientific name for muscle fiber bundle.

• Epimysium

• Fascicle

• Myofibril

• Myofilament

Tough connective tissue sheath that surrounds the entire muscle.

• Endomysium

• Epimysium

• Fascicle

• Perimysium

Connective tissue sheath that surrounds muscle fibers.

• Endomysium

• Epimysium

• Fascicle

• Perimysium