Muscle Tissue

What is the structural unit of a skeletal muscle?

• Myosin

• Actin

• Myofibril

• Sarcomere

Which type of muscle is attached to the skeletal system?

• Visceral

• Cardiac

• Skeletal

• Smooth

What is the main function of smooth muscle?

• Protecting abdominal viscera

• Generating heat

• Producing body movements

• Stabilizing body positions

Which muscle type has intercalated discs?

• Visceral

• Cardiac

• Skeletal

• Smooth

What is the main function of the muscles in the thorax?

• Facial expression

• Alter the size of the thoracic cavity for breathing

• Protect abdominal viscera

• Move the vertebral column

What is the term for the inability to maintain force of contraction after prolonged activity?

• Muscle fatigue

• Muscle tension

• Muscle contraction

• Muscle relaxation

Which muscle type has more mitochondria and longer contractions than skeletal muscle?

• Cardiac

• Smooth

• Visceral

• Skeletal

What is the arrangement of contractile elements in skeletal muscle cells?

• I-band = dark band

• A-band = light band

• A-band = dark band

• I-band = light band

What is the practical demonstration method used to assess fatigue in human skeletal muscles?

• Electrocardiography

• Electromyography

• Mossos erography

• Erogram

What is the main function of the arm muscles?

• Help in movement of thigh and leg

• Help in movement of the foot and toes

• Help in movement of forearm

• Help in facial expression