Exam 12: Muscle: Mechanisms of Contraction and Neural Control

Which of the following is NOT true of fast glycolytic/Type IIX white muscle fibers?

Damage to the lower motor neurons would induce

Coactivation of alpha and gamma motoneurons is stimulated by ______________ neurons.

During skeletal muscle contraction,

Which of the following is true for the first 30 minutes of heavy exercise?

Smooth,sustained muscle contractions in vivo are due to synchronous activation of motor units.

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

Each fascicle of a muscle is surrounded by the

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

What structure is composed of protein filaments and is located in the center of the thick filaments?

When a muscle cell generates tension but does not shorten,a(n)______ contraction occurs.

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

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

The specialized region of the sarcolemma at the neuromuscular junction is called the

Which of the following is NOT true of single-unit smooth muscle?

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

What is the lighter area in the center of the A-band called?

When skeletal muscle cells contract,they increase in length.

What protein primarily makes up the thick filament?

The muscle spindle apparatus is associated with