Exam 12: Muscle: Mechanisms of Contraction and Neural Control

Activation of intrafusal fibers by alpha motoneurons creates muscle tone.

ATP in muscle contraction is needed for

Each fascicle of a muscle is surrounded by the

Fatty acids provide the majority of the energy for muscle metabolism when a person is

Slow twitch fibers have a ______ oxidative capacity and ________ glycogen content.

Repaying the oxygen debt requires replacing oxygen that was

What type of sensory neuron is associated with a muscle spindle apparatus?

The process by which action potentials cause muscle contraction is

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

In cardiac muscle,calcium ions are released from the sarcoplasmic reticulum due to direct interaction with the voltage-gated Ca²⁺ channels.

The first 1 to 2 minutes of moderate to heavy exercise relies on _____ for ATP production.

Skeletal muscles with a low innervation ratio have a low degree of neural control.

Duchenne's muscular dystrophy

Degeneration of ______________ motor neurons occurs in amyotrophic lateral sclerosis.

The muscle spindle apparatus serves as a muscle length detector.

Hemiplegia is paralysis of an upper limb of one side and the lower limb of the other side.

Blood lactate will begin to rise when exercise is performed at a rate that is

_______ refer to muscle contractions that produce a shortening muscle with a constant contraction strength at a given load.

High-energy phosphates are stored in skeletal muscle as glycogen ATP.

The greater the level of physical training,the higher the proportion of energy derived from the oxidation of ____ during exercise below VO_2max.