Exam 8: Muscular System

Motor neurons communicate with muscle cells by releasing chemicals called ____________.

What structures form a motor unit?

What enzyme catalyzes the breakdown of the neurotransmitter used to stimulate skeletal muscle?

What is muscle atrophy?

What are fascicles?

Cardiac muscle is located in the walls of blood vessels.

Troponin, tropomyosin and actin are all parts of the thin filaments.

What happens to a muscle that has lost its innervation?

Using the muscle name as a clue, where is the tibialis posterior muscle located?

The enzyme ATPase is located in the heads of myosin molecules.

In muscle anatomy, what is an origin?

What is the product of the aerobic breakdown of glucose?

By what means does an electrical impulse travel deep into a skeletal muscle fiber in order to trigger a contraction?

Acetylcholinesterase breaks down the cross-bridge linkages between myosin to actin.

What muscle can act as a prime mover for plantar flexion of the foot?

Cardiac muscle is located in the walls of blood vessels.

One factor that may contribute to the development of muscle fatigue is an accumulation of the __________ resulting from anaerobic metabolism.

What structure within a skeletal muscle cell extends from Z line to Z line?

Consider a muscle that originates on the anterior forearm and inserts on the palm of the hand. What is the action of this muscle?

Small, sustained contractions that are the result of repeated nervous stimulation, originating from the spinal cord and stimulating only a few muscle fibers at a time, is called __________.