Mammalian Muscle Structure Quiz

What is another name for skeletal muscle?

• Striated muscle

• Cardiac muscle

• Smooth muscle

• Involuntary muscle

Which type of muscle is responsible for moving the rigid skeleton of mammals?

• Smooth muscle

• Involuntary muscle

• Cardiac muscle

• Skeletal muscle

What is the sarcolemma?

• The cytoplasm of a muscle fiber

• The cell surface membrane of a muscle fiber

• The endoplasmic reticulum of a muscle fiber

• The mitochondria of a muscle fiber

What are T-tubules?

• Deep tube-like projections of the sarcolemma

• Bundles of actin and myosin filaments

• Protein pumps in the sarcoplasmic reticulum

• Mitochondria in the sarcoplasm

What is the primary function of mitochondria in muscle fibers?

• To transport proteins

• To store calcium ions

• To form the sarcolemma

• To generate ATP for muscle contraction

What are myofibrils composed of?

• Both actin and myosin filaments

• Only myosin filaments

• Only sarcoplasm

• Only actin filaments

What is the role of the sarcoplasmic reticulum in muscle fibers?

• To generate ATP

• To transport calcium ions

• To form the sarcolemma

• To create T-tubules

Which type of muscle is found in the walls of blood vessels?

• Smooth muscle

• Striated muscle

• Cardiac muscle

• Skeletal muscle

What is a unique property of cardiac muscle?

• It is multinucleated

• It is myogenic

• It is voluntary

• It tires easily

What is the function of intercalated discs in cardiac muscle?

• To store calcium ions

• To connect muscle fibers

• To generate ATP

• To form the sarcolemma