Muscular System Quiz

Which type of muscle is attached to bones and is voluntarily controlled?

• Cardiac

• Smooth

• Skeletal

• None of the above

What is the function of the muscular system?

• Maintain posture

• Produce body heat

• Contraction of organs and vessels

• All of the above

What is the property of muscle that allows it to shorten forcefully?

• Contractility

• Excitability

• Extensibility

• Elasticity

What is the basic structural and functional unit of a skeletal muscle?

• Sarcomere

• Myofibril

• Muscle fiber

• Myofilament

Which neurotransmitter stimulates skeletal muscles?

• Acetylcholine

• Dopamine

• Serotonin

• GABA

What is the process by which ATP is converted to ADP and P to release energy for muscle contractions?

• Aerobic respiration

• Anaerobic respiration

• Creatine phosphate breakdown

• Conversion of ADP to ATP

What is the term for a sustained contraction that occurs when the frequency of stimulation is so rapid that no relaxation occurs?

• Tetanus

• Summation

• Recruitment

• Muscle tone

Which type of muscle contraction has an increase in muscle tension but no change in length?

• Isometric

• Isotonic

• Concentric

• Eccentric

What is the term for the constant tension produced by body muscles over long periods of time?

• Muscle fatigue

• Muscle tone

• Muscle twitch

• Muscle contraction

Which muscle is responsible for flexing the hip?

• Gluteus maximus

• Iliopsoas

• Rectus femoris

• Tibialis anterior