Muscles and Muscle Contraction

Which type of muscle tissue is found in the heart?

• Skeletal muscle tissue

• Smooth muscle tissue

• Cardiac muscle tissue

• None of the above

Which type of muscle tissue is found in the digestive system?

• Skeletal muscle tissue

• Smooth muscle tissue

• Cardiac muscle tissue

• None of the above

Which type of muscle tissue is involved in voluntary control?

• Skeletal muscle tissue

• Smooth muscle tissue

• Cardiac muscle tissue

• None of the above

What is the function of intercalated discs in cardiac muscle tissue?

• To aid in muscle contraction

• To provide elasticity

• To allow conscious control

• None of the above

What is the function of smooth muscle tissue in the bladder?

• To aid in muscle contraction

• To provide elasticity

• To allow conscious control

• None of the above

What is the main muscle doing the work called?

• Agonist

• Antagonist

• Origin

• Insertion

What is the term for the ability of muscle tissue to be stimulated?

• Extensibility

• Elasticity

• Excitability

• Contractility

What is the protein that makes up thin filaments in a sarcomere?

• Actin

• Myosin

• Tropomyosin

• Troponin

What is the protein that makes up thick filaments in a sarcomere?

• Actin

• Myosin

• Tropomyosin

• Troponin

What is the role of calcium in muscle contraction?

• It binds to troponin and allows myosin to bind to actin

• It hydrolyzes ATP to provide energy for muscle contraction

• It blocks the myosin bonding sites on actin

• It causes the thin and thick filaments to slide past each other