Sarcomere Anatomy

What is the smallest unit of a muscle to contract?

• Sarcomere
• Myofibril
• Muscle fiber
• Myofilaments

How many types of myofilaments make up the sarcomere?

• 1
• 2
• 4
• 8

Which myofilament is thin?

• Collagen
• Elastin
• Actin
• Myosin

Which myofilament is thick?

• Myosin
• Collagen
• Elastin
• Acetylcholine

Which myofilament has hands to grab the other one?

• Actin
• Myosin

Which myofilament is attached to the z line?

• Actin
• Myosin

Which part of a sarcomere contains only thick filaments?

• I band
• A band
• H zone
• Z zone

Which part of a sarcomere contains only thin filaments?

• I band
• A band
• H zone
• M zone

Which part of a sarcomere is the wall between two different sarcomeres?

• M line
• Z line

Which part of a sarcomere contains BOTH actin and myosin myofilaments?

• A band
• I band
• H zone
• M line