Muscular System - HS 3

What is a sarcomere?

• A compartment in a myofilament

• The area between two intercalated discs

• The wavy lines on a the cell, as seen in a microscope

• The contractile unit between two Z discs

Which type of muscle tissue contracts most quickly upon stimulation?

• Visceral

• Smooth

• Skeletal

• Cardiac

Which of the following can actually shorten during a muscle contraction?

• Sarcomere

• Myosin filament

• Actin filament

• Myofilament

Which of the following is the opposite movement to extension?

• Flexion

• Rotation

• Circumduction

• Adduction

Which statement best describes the Sliding Filament Theory?

• Muscle fiber contraction is “all or none” the whole muscle fiber must contract once stimulated

• Muscle fiber contraction is generated by thin filaments sliding past thick filaments

• Muscle fibers contract as brief, single contractions

• Muscle fibers fatigue as a result of prolonged strenuous muscle activity

Which of the following root words does NOT mean "muscle"

• Myo-

• Sarc-

• -mys

• -fibr

The word "sarcomere" means...

• part of a muscle

• part of a bone

• a muscle cell

• a bone cell

Structure 3 is...

• Perimysium

• Epimysium

• Endomysium

Structure 2 is...

• Perimysium

• Epimysium

• Endomysium

Structure 6 is...

• Perimysium

• Epimysium

• Endomysium