Muscular System Review Part 1

Which of the following is NOT a major task of the muscular system?

• Movement of body

• Maintaining Posture

• Making red Blood cells

• Producing heat

Match the following words with their definition:

• Ability to recoil to original shape

• Elasticity

• Ability to stretch past original shape

• Excitability

• Ability to shorten when stimulated

• Contractibility

• Ability to respond to a stimulus

• Extensibility

Which muscles are striated, voluntary, multinucleated, and can contract more quickly if needed?

• Skeletal

• Cardiac

• Smooth

Which muscles are striated, branched, involuntary, uninucleated, and can only speed up for very short amounts of time?

• Skeletal

• Cardiac

• Smooth

Which muscles are non-striated, layered, involuntary, uninucleated, and can only produce slow, steady contractions?

• Skeletal

• Cardiac

• Smooth

Which membrane covers the whole muscle?

• Epimysium

• Endomysium

• Perimysium

Which membrane covers the individual muscle fibers?

• Epimysium

• Endomysium

• Perimysium

Which membrane covers the fascicles?

• Epimysium

• Endomysium

• Perimysium

What do we call the repeating unit of a skeletal muscle fiber?

• sarcolemma

• sarcomere

• sarcoplasmic reticulum

• myofilament

What type of channel on the axon terminal is stimulated by an incoming action potential and allows Calcium to enter the axon?

• chemically-gated

• voltage-gated

• myosin-gated