P1 Quiz on Muscles, Muscle Structure, & Muscle Contraction

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Which of these is NOT a major function of the muscular system?

• Movement for your body
• Heat production for the body
• Maintaining your posture (keeping stable)
• Making red blood cells

The ability of a muscle to respond to a stimulus is called ______.

• Excitability
• Elasticity
• Extensibility
• Contractility

Which of the following words means “the ability to recoil or bounce back to the original shape”?

• excitability
• extensibility
• contractability
• elasticity

The _______ are attached to the Z-Lines.

• myosin filaments
• actin filaments
• troponin
• tropomyosin

Which of these is NOT a connective tissue membrane, but in fact the cell membrane of the muscle cell?

• endomysium
• epimysium
• perimysium
• sarcolemma

Which connective tissue membrane covers the an individual muscle fiber?

• endomysium
• epimysium
• perimysium
• sarcolemma

Which connective tissue membrane covers the whole muscle?

• endomysium
• epimysium
• perimysium
• sarcolemma

These are the contracting units that extend from Z-Line to Z-Line.

• Sarcomeres
• T-Tubules
• Sarcoplasmic reticulums
• Fascicles

This chemical is released from the sarcoplasmic reticulum when the muscle fiber receives an action potential from the nervous system.

• ATP
• Myosin ions
• Calcium ions
• Acetylcholine