When an isolated muscle fiber is exposed to a stimulus of a certain strength causing it to fire.
Threshold stimulus
The delay between the time of stimulation and the beginning of a contraction
Latent period
The force developed by a muscle is reflected by the _________________ of stimulation and ______________ of fibers that take part in the contraction.
Frequency, number
In a sustained muscle contraction the force of individual twitches combines by the process of...
Summation
An increase in the number of activated motor units is...
Recruitment
Even when a muscle appears to be at rest, its fibers undergo certain degree of sustained contraction also called ___________________ _________________.
muscle tone
When muscles shorten or lengthen during a contraction.
Isotonic
Which of the following exercise would be an example of an isometric contraction.
hanging from a pull up bar without moving.
Two types of muscle fibers are type I or ___________ twitch fibers and Type II or ___________ twitch fibers.
slow, fast
Fast-twitch muscles are ___________ in color due to the fact they have less myoglobin.
white
Distance runners would have more Type _______ muscle fibers than sprinters would.
1
Recognize myogram of a single twitch.
What does the y axis of a myogram represent?
Force of contraction.
Recognize a myogram of sustained contraction with partial relaxation.
Recognize a myogram of sustained contraction where individual twitches are indiscernible.
D