Muscle Contraction 2 Quiz

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

• 10

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