muscle system Flashcards
What is the latent period?
the lag between muscle stimulation and its response
what is a twitch?
it is a single contraction that lasts only a fraction of a second
What is tetany?
it is summation of multiple contraction without a parti a relaxation
How is muscle tone (tonus) maintained?
it is maintained because the muscle has some degree of contraction even though it seem to be relax
Where is cardiac muscle found?
It is found in the walls of the heart and is responsible for contraction
What modulates the contractions of the heart?
The autonomic nervous system.
what cause the activity of the heart to decrease?
The parasympathetic nervous system
What increases the activity of the heart?
The sympathetic nervous system
What is the sinoatrial node?
also called the pacemaker it is found in the and initiate the contraction of the heart
What are the two types of smooth muscle?
One type is separate fibers
the second is sheets called visceral muscle
Where are the separate fibers of smooth muscle found?
the constrict in response of motor stimuli
in the iris
walls of blood vessels
Where are the sheets of smooth muscle found?
also called visceral muscle it forms the walls of many of the visceral organs.
It also has inherent, involuntary and rhythmic contractions like the heart
What modulates the visceral muscle?
The autonomic nervous system
What increase the activity of visceral muscle?
the parasympathetic system. It is responsible for peristalis
What decreases the activity of visceral muscle?
the sympathetic nervous system
