Muscle Contraction Quiz

What are the three types of muscle tissue?

• Cardiac, skeletal, and connective

• Smooth, skeletal, and connective

• Smooth, cardiac, and connective

• Smooth, cardiac, and skeletal

Which type of muscle tissue is found in the walls of hollow visceral organs?

• Connective muscle tissue

• Skeletal muscle tissue

• Cardiac muscle tissue

• Smooth muscle tissue

What is the specialized name for the endoplasmic reticulum in muscle cells?

• Smooth reticulum

• Sarcoplasmic reticulum

• Mitochondrial reticulum

• Cardiac reticulum

What is the function of troponin and tropomyosin in muscle contraction?

• They block actin from binding with myosin

• They provide energy for muscle contraction

• They bind with calcium to allow actin and myosin to interact

• They regulate the release of ATP in muscle cells

What triggers the release of calcium from the sarcoplasmic reticulum?

• The release of acetylcholine from motor neurons

• The contraction of actin and myosin

• The binding of ATP to myosin

• An action potential traveling down the T-tubules

What happens when myosin binds to actin during muscle contraction?

• The myosin releases stored energy and changes shape

• The myosin breaks down ATP into ADP and phosphate

• The myosin unbinds from actin and releases calcium

• The myosin pulls on the tropomyosin and troponin

What is the role of ATP in muscle contraction?

• It releases calcium from the sarcoplasmic reticulum

• It binds with troponin to unblock actin

• It provides energy for myosin to bind with actin

• It breaks down into ADP and phosphate to release stored energy

What is the structure that separates sarcomeres in a muscle fiber?

• T-tubule

• Z line

• Sarcoplasmic reticulum

• Myofibril

Which type of muscle tissue is voluntary and attached to the skeleton?

• Connective muscle tissue

• Cardiac muscle tissue

• Smooth muscle tissue

• Skeletal muscle tissue

What is the main function of smooth muscle tissue?

• To create movement by pulling bones

• To push fluid and material around in hollow organs

• To pump blood throughout the body

• To support the weight and fend off gravity