B1.2 Muscular Function Quiz

What type of muscle is under voluntary control?

• Smooth muscle

• Involuntary muscle

• Skeletal muscle

• Cardiac muscle

Which type of muscle is known as the heart muscle?

• Skeletal muscle

• Cardiac muscle

• Striated muscle

• Smooth muscle

What is the main function of skeletal muscle?

• To line hollow organs

• To move the skeleton

• To pump blood

• To generate heat

How much of the body’s weight is made up of muscles?

• 50-60%

• 40-50%

• 30-40%

• 20-30%

What is the primary function of smooth muscle?

• To stabilize body positions

• To move the skeleton

• To generate heat

• To transport substances

What is the ability of a muscle to return to its original length after being stretched called?

• Myogenic

• Elasticity

• Extensibility

• Contractility

Which type of motor unit is characterized by slow twitch muscle fibers?

• Type III

• Type IIx

• Type IIa

• Type I

What is the main energy currency of cells used for muscular contraction?

• ADP

• NADH

• ATP

• PCr

What type of muscle contraction occurs when the muscle lengthens?

• Isometric

• Concentric

• Eccentric

• Isokinetic

Which type of muscle fiber has a high aerobic endurance?

• Type III

• Type IIx

• Type IIa

• Type I