Myofibrils and Myofilaments

Identify the sarcomere in the diagram above.

• A

• B

• F

• G

• H

Identify the I band in the diagram above.

• A

• D

• F

• G

• H

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Identify the zone of overlap in the diagram above.

• A

• D

• F

• G

• H

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Identify the structure that the thin filaments are anchored to in the diagram above.

• A

• B

• C

• D

• E

Identify the structure that the thick filaments are anchored to in the diagram above.

• A

• B

• C

• D

• E

Which of the following does not occur during sarcomere shortening?

• I band narrows

• A band narrows

• H zone narrows

• zone of overlap increases

Which protein(s) is/are found in the thin myofilament? Select all that apply.

• actin

• myosin

• troponin

• tropomyosin

Which protein(s) is/are found in the thick filament? Check all that apply.

• actin

• myosin

• troponin

• tropomyosin

Which protein has a myosin-binding site?

• actin

• myosin

• troponin

• tropomyosin

Myofilaments shorten during muscle contraction.

• true

• false