Exam 12: Muscle: Mechanisms of Contraction and Neural Control

Myosin contains binding sites for ______________ and _____________.

For a muscle to contract,it must overcome stronger opposing forces.

The stretch reflex is enhanced in response to activation of

Ca²⁺ must bind to tropomyosin so that the myosin binding sites on actin will be accessible to the myosin.

A reserve of high energy phosphate is stored in muscle as

Longer,stronger muscles have motor units with very few fibers.

Isotonic muscle contractions are often preceded by isometric contractions.

In smooth muscle cells,______________ functions in a manner analogous to troponin.

Shaking of limbs at rest that disappears during voluntary movement due to damage to the basal nuclei is called

Type IIX skeletal muscle fibers

Which of the following is NOT true about the series-elastic component to contraction?

High-energy phosphates are stored in skeletal muscle as creatine phosphate.

The muscle spindle apparatus serves as a muscle length detector.

Each somatic motor neuron with all the muscle fibers it innervates is a

Random uncontrolled contractions of different muscle groups as a result of damage to the basal nuclei is a symptom of upper motor neuron damage called

Degeneration of ______________ motor neurons occurs in amyotrophic lateral sclerosis.

The light band of a skeletal muscle is known as the

Skeletal muscles at rest obtain most of their energy from the aerobic respiration of

Myosin will not bind to actin unless ADP is bound to the myosin head.

Motor unit recruitment allows for _________ contraction strength.