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stucture function

QuestionAnswer
What is the force exerted by a contacted muscle on an object? muscle tension
Define load The opposing force exerted on the muscle by the weight of the object
Describe Isometric contraction muscles do not shorten, muscle tension develops but load doesn't move.
When the muscle shortens and muscle tension develops and overcomes the load is known as what? isotonic contraction
What is a motor unit? A motor neuron and all the muscle fibers it innervates
What is the motor unit response to a single AP of its motor neuron? muscle twitch
What is a myogram? a graph of time and strength of a contraction
What are 3 phases of muscle contraction? latent period, period of contraction, relaxation
The excitation of muscle coupling and forming cross bridges happens on what phase? phase 1 latent period
when the muscle shortens and cross bridges are active and have enough tension to overcome the load happens on what phase? phase 2 period of contraction
when cross bridges decrease and re entry of calcium into the sr happens in what phase? phase 3 relaxation
What do graded muscle responses do? control movement
Created by: cdixon10