Muscle Quiz 1

Resting neurons and skeletal muscle cells have membranes that are positively charged internally.

• True

• False

Which of the following has the components of skeletal muscle arranged from the largest to the smallest?

• muscle, myofilament, myofibril, fiber, sarcomere, fascicle

• muscle, fascicle, fiber, myofibril, sarcomere, myofilament

• fascicle, sarcomere, fiber, muscle, myofilament, myofibril

• muscle, fiber, myofibril, myofilament, sarcomere, fascicle

The sites where the motor nerve impulse is transmitted from the nerve endings to the skeletal muscle cell membranes are called the ____.

• muscle fiber junctions
• axon terminals
• synaptic clefts
• neuromuscular junctions

Which of the following is a function of muscles?

• convert heat energy into chemical energy

• convert mechanical energy into chemical energy

• convert chemical energy into mechanical energy

• convert mechanical energy into heat energy

What is the name of the model of muscle contraction?

• sliding filament

• excitation-contraction coupling

• peristalsis

What causes the troponin-tropomysin complex (jacket) to move allowing the myofilaments to attach to one another?

• acetylcholine

• Calcium

• the neurotransmitter

• ATP

• ADP

The striations of skeletal muscle cells are a result of the arrangement of the actin and myosin filaments.

• True

• False

muscle cell membrane

• myoglobin

• myofibrils

• sarcolemma

• sarcoplasm

• sarcoplasmic reticulum

muscle cell cytoplasm

• myoglobin

• myofibrils

• sarcolemma

• sarcoplasm

• sarcoplasmic reticulum

muscle cell endoplasmic reticulum

• myoglobin

• myofibrils

• sarcolemma

• sarcoplasm

• sarcoplasmic reticulum