Muscle Anatomy Quiz

The functional unit of contraction in a skeletal muscle fiber is the __________. 

• myofilament 

• myofibril 

• sarcomere 

• sarcolemma 

The correct order for the smallest to the largest unit of organization in muscle tissue is ________. 

• fascicle, filament, muscle fiber, myofibril 

• filament, myofibril, muscle fiber, fascicle 

• muscle fiber, fascicle, filament, myofibril 

• myofibril, muscle fiber, filament, fascicle 

Tags

NGSS.HS-LS1-2

In relaxed muscle, the myosin-binding site on actin is blocked by ________. 

• titin 

• troponin 

• myoglobin 

• tropomyosin 

The cell membrane of a muscle fiber is called ________. 

• myofibril 

• sarcolemma 

• sarcoplasm 

• myofilament 

Thin and thick filaments are organized into functional units called ________. 

• myofibrils 

• myofilaments 

• T-tubules 

• sarcomeres