Muscular System Review

Which layer of mysia covers the entire muscle?

• Perimysium

• Epimysium

• Endomysium

• Sarcomysium

Which layer of mysia covers the muscle fascicle?

• Perimysium

• Epimysium

• Endomysium

• Sarcomysium

Which layer of mysia covers individual muscle fibers?

• Perimysium

• Epimysium

• Endomysium

• Sarcomysium

What kind of muscle is this (cardiac, smooth, or skeletal)? How do you know?

• cardiac

• smooth

• skeletal

What is the cause of the stripes, or striations, shown in the image below? (2 pts) (hint: think about how this type of muscle is used and how it moves)

• The arrangement of actin and myosin filaments

• The presence of connective tissue

• The distribution of blood vessels

• The alignment of muscle fibers

Elasticity (stretchiness) is an important quality of muscle tissue because it allows muscles to:

• contract and relax efficiently

• maintain a rigid structure

• prevent any movement

• increase in size permanently

What exactly causes your muscles to burn when you are exercising?

• Lactic acid buildup

• Increased oxygen levels

• Dehydration

• Muscle fatigue

BONUS: Muscle contractions would be affected if ATP was completely depleted in a muscle fiber.

• Muscle contractions would continue normally.

• Muscle contractions would stop immediately.

• Muscle contractions would become more forceful.

• Muscle contractions would slow down but not stop.

The connective tissue surrounding each fascicle, as pictured in #3, is called:

• perimysium

• epimysium

• endomysium

• myofibril

The connective tissue that surrounds the individual skeletal muscle fibers, as pictured in 4, is called:

• epimysium

• perimysium

• actin filiament

• endomysium