Muscular System Quiz

What type of muscle tissue is responsible for moving food in the digestive tract?

• Skeletal

• Smooth

• Cardiac

• Nervous

Which type of muscle tissue is found in the heart?

• Skeletal

• Smooth

• Cardiac

• Connective

What is the primary function of aponeuroses?

• To store fat

• To connect muscles to each other

• To produce red blood cells

• To protect the brain

Which connective tissue extends inward from the epimysium and surrounds bundles of skeletal muscle fibers?

• Endomysium

• Perimysium

• Epimysium

• Myofibril

Which structure is responsible for transmitting electrical signals to muscle fibers?

• Blood vessels

• Nerve

• Tendon

• Fascia

What does the cytoplasm of a muscle cell contain?

• Only mitochondria

• Only nuclei

• Mitochondria and nuclei

• Only ribosomes

What is the role of myofibrils in muscle cells?

• Energy storage

• Muscle contraction

• Protein synthesis

• Cell division

What are the smallest contractile units of a muscle cell called?

• Myofibrils

• Sarcomeres

• Actin filaments

• Myosin filaments

What are the I bands made up of?

• Myosin filaments

• Actin filaments

• Overlapping thick and thin filaments

• Proteins that hold filaments in place

What are the dark bands in myofibrils called?

• I bands

• A bands

• H zones

• Z lines