muscle anatomy

A is pointing to?

• Sarcomere 
• Z disk
• A band
• I band

B is pointing to?

• Sarcomere 
• Z disk
• A band
• I band

C is pointing to?

• H zone
• Z disk
• actin
• I band

D is pointing to?

• H zone
• Z disk
• A band
• I band

E is pointing to?

• H zone
• Z disk
• A band
• I band

F is pointing to?

• H zone
• Actin
• A band
• Sarcomere 

Which of the following is the correct order?

• fascicle, muscle fiber, myofibril, sarcomere, myofilament
• muscle fiber, fascicle, sarcomere, myofibril, myofilament
• sarcomere, muscle fiber, fascicle, myofibril, myofilament
• fascicle, muscle fiber, myofilament, myofibril, sarcomer

when skeletal muscle is fully contracted, the __ are closer to the thick filament

• H
• Z
• synaptic cleft
• sarcomere

tiny chains of contractile units between 2 Z disks, which are aligned end to end

• H
• Z
• synaptic cleft
• sarcomere

myosin protein

• sarcolemma
• sarcoplasmic reticulum
• thick filament
• thin filament