Chapter 7: Muscular System

Which type of muscle is striated, voluntarily controlled, and attached to bone?

• None of the above

• Cardiac

• Smooth

• Skeletal

What is the function of skeletal muscles?

• Maintain posture

• Production of body heat

• Respiration

• All of the above

What is the connective tissue sheath that surrounds skeletal muscle?

• Epimysium

• Endomysium

• Perimysium

• None of the above

What is the basic structural and functional unit of muscle?

• None of the above

• Myofilament

• Myofibril

• Sarcomere

Which component of the muscle cell membrane has tubelike inward folds or T tubules?

• Sarcoplasm

• Sarcolemma

• Sarcomere

• None of the above

What is the neurotransmitter that stimulates skeletal muscles?

• None of the above

• Dopamine

• Serotonin

• Acetylcholine

What is the space between the presynaptic and postsynaptic terminals called?

• Synapse

• Motor unit

• None of the above

• Synaptic cleft

What gives the striated appearance to the muscle?

• Sarcomere

• Actin

• Myofilaments

• None of the above

What is the function of the motor neuron in muscle contraction?

• Inhibit muscle cells

• None of the above

• Stimulate muscle cells

• Produce heat

What is the function of the terminal cisternae in muscle contraction?

• None of the above

• Produce ATP

• Release Ca2+

• Store neurotransmitters