BIO121 Chapters 10-16 Practice Final Exam

Skeletal muscle is primarily controlled by which nervous system division?

• Autonomic nervous system
• Somatic nervous system
• Sympathetic nervous system
• Parasympathetic nervous system

Which characteristic of muscle tissue refers to the ability to shorten and generate force?

• Elasticity
• Excitability
• Contractility
• Extensibility

Which connective tissue layer surrounds an entire skeletal muscle?

• Endomysium
• Perimysium
• Epimysium
• Perichondrium

Fascicles are best described as what structures?

• Bundles of axons
• Bundles of muscle fibers
• Connective tissue sheets
• Groups of sarcomeres

The plasma membrane of a muscle fiber is called the what?

• Sarcolemma
• Sarcoplasm
• Sarcoplasmic reticulum
• Endomysium

Which structure stores calcium ions in muscle fibers?

• Golgi apparatus
• T-tubule
• Sarcoplasmic reticulum
• Motor end plate

Sarcomeres are considered the functional units of what process?

• ATP synthesis
• Muscle contraction
• Protein synthesis
• Cell division

Which sarcomere region contains only thin filaments?

• A band
• H zone
• M line
• I band

Thick filaments are primarily composed of which protein?

• Actin
• Troponin
• Myosin
• Tropomyosin

Calcium binds to which protein to initiate muscle contraction?

• Actin
• Troponin
• Titin
• Dystrophin