Muscular Microscopic Anatomy Review

The Light I Band consists of... 

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

The functional unit of the muscle cell is the: 

• Sarcomere
• Osteon
• Myofilament
• Muscle fiber

The thick filament is composed of: 

• Myosin
• Actin

The thin filament is composed of: 

• Myosin
• Actin

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

• Muscle fiber
• Myofilament
• Sarcomere
• Actin 

___ and ___ are regulatory proteins bound to actin. 

• Troponin and tropomyosin
• Myosin and actin
• Calcium and Oxygen
• Glycogen and hemoglobin

A sarcomere is

• A protein filament or fiber
• The basic contractile unit of muscle contraction
• An organelle
• An organ

The epimysium covers

• the entire muscle

• the fascicle

• the muscle fiber

• the myofibril

Which connective tissue surrounds the fascicle?

• epimysium

• perimysium

• sarcolemma

• endomysium

What is another name for #9 (cell membrane)?

• Sarcomere

• Sarcolemma

• Myofibril

• Myofiber