Muscle System Review

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

• Movement for your body

• Heat production for the body

• Maintaining posture

• Making red blood cells

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

• Excitability

• Contractability

• Extensibility

• Elasticity

Which type of muscle is involuntary and makes up many of your internal organs?

• skeletal

• smooth

• cardiac

• gastrointestinal

Which type of muscle(s) is/are nonstriated?

• Skeletal

• smooth

• cardiac

• all of the above

Which membrane covers an individual muscle fiber?

• endomysium

• epimysium

• perimysium

• mesomesium

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

• water-gated

When Calcium ions enter the neuromuscular junction, what neurotransmitter is released across the synaptic cleft?

• Calcium

• Acetylcholine

• K+

• Na+

What attaches muscle to bone?

• ligaments

• tendons

• sliding filaments

• sarcomeres

Which two structures block the active site on an actin filament?

• z disc and the m line

• calcium and myosin

• troponin and tropomyosin

• actin and perimysium

The _______ separate one sarcomere from another.

• cross bridges

• M-lines

• Z-discs

• active sites