Microscopic Muscle Anatomy

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

Which of the following muscle types is NOT striated?!

• Smooth
• Skeletal 
• Cardiac
• All of the above are striated

Scientific name for muscle fiber bundle.

• Epimysium

• Fascicle

• Myofibril

• Myofilament

Membrane that covers several muscle fibers to form a bundle.

• Endomysium

• Epimysium

• Fascicle

• Perimysium

Tough connective tissue sheath that surrounds the entire muscle.

• Endomysium

• Epimysium

• Fascicle

• Perimysium

Connective tissue sheath that surrounds muscle fibers.

• Endomysium

• Epimysium

• Fascicle

• Perimysium

Specialized plasma membrane surrounding the muscle fiber.

• Myofibril

• Myofilament

• Sarcolemma

• Sarcomere