Exam 12: Muscle: Mechanisms of Contraction and Neural Control

The prime mover of any skeletal movement is called the

The cerebellum directly influences motor activity.

All three types of muscle demonstrate peristaltic contractions.

The stretch reflex is enhanced in response to activation of

Skeletal muscle cells are multinucleated.This is called a/an

The inhibition of an antagonistic muscle so that the agonist can do the intended movement is due to

Which of the following statements about muscles is FALSE?

Muscle spasms can be avoided by stretching slowly,which stimulates mainly the primary,annulospiral sensory endings.

Thin filaments are composed of myosin and tropomyosin.

The movement of the troponin-tropomyosin complex requires

Lower motor neurons are found in the lower part of the brain.

The inability of muscle cells to relax due to high frequency stimulation is termed

What activates the myosin head to begin cross-bridging?

Smooth muscle contraction requires the actions of myosin light chain kinase.

Cross-bridge formation occurs when myosin heads attach to actin molecules located in the thin filaments.

Excitation of the Golgi tendon organ normally induces

What structures carry the action potentials into the interior of the muscle to cause muscle contraction?

Gap junctions have only been identified in cardiac muscle.

A force-velocity curve shows the _______ relationship between the force opposing muscle contraction and the velocity of muscle shortening.