Exam 8: Muscle Physiology

With twitch summation, the muscle fiber is stimulated so rapidly that it does not have an opportunity to return to resting potential between stimuli.

Match muscle term with correct characteristic. -lactic acid

Indicate the characteristics of the muscle-tension receptors using the following answer code: -Detects change in muscle tension.

Match sarcomere component with correct characteristic. -Contains partially overlapping thick and thin filaments.

Slow-oxidative muscle fibers have high resistance to fatigue.

If the load on a muscle is increased, eventually a load will be reached at which the velocity of shortening becomes zero. At this point, the muscle contraction is referred to as

Central fatigue of a muscle directly results from the accumulation of lactic acid in the muscle.

A single skeletal muscle cell is known as a "muscle fiber."

Indicate which characteristic applies to which type of muscle. -Does not accomplish any work.

MATCHING Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below: -Spherical.

The H zone

Match muscle type with correct characteristics. -multi unit smooth muscle

The heart initiates its own action potentials without any external influence.

The insertion of a muscle

A skeletal muscle undergoes hypertrophy mainly by producing many more muscle fibers.

Match sarcomere component with correct characteristic. -Runs down the middle of the I band.

In a state of ____________________ a muscle cannot maintain any kind of tension.

The corticospinal system primarily mediates

Indicate the characteristics of the muscle-tension receptors using the following answer code: -Initiates a monosynaptic reflex.

Acetylcholinesterase has ATPase activity.