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

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

• Muscle fiber
• Myofilament
• Sarcomere
• Actin 

Tags

NGSS.HS-LS1-2

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

• M-Line
• H-Zone
• Z-Disc
• A-Band

Which of the following is NOT a function of the muscular system?

• Heat production
• Joint stability
• Movement
• Communication

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

Tough connective tissue sheath that surrounds the entire muscle.

• Endomysium

• Epimysium

• Fascicle

• Perimysium