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A&P chapt 6 1st term

the muscular system

QuestionAnswer
the 3 major types of muscles of the body skeletal, smooth, cardiac
skeletal muscle skeletal muscles are voluntary muscles which mean they are under concious control and are striped muscles which allow us to perform external ,movements such as- running, lifting, or scratching. responsible for maintaining posture&heat generation
smooth muscles amooth muscles are involuntary and not under our conscious control, this muscle is found within certain organs, blood vessels, and airways, allows for internal movement of food in the case of the stomach and other digestive organs.
cardiac muscle specialized cardiac muscle which has a striated apearance. is found solely in the heart. It makes up the walls of the heart and causes the heart to contract. These contractions cause the internal movement(circulation) of the blood within the body.
agonists or primary movers muscle groups that cause movement
point of origin the end of the muscle that is attached to the stationary bone
point of insertion the muscle end that is attached to the moving bone
synergistic other muscles can assist this movement, such as some of the muscles in the hand and wrist. they assist the primary mover.
diaphragm the skeletal muscle that controls our breathing. it is under both voluntary and involuntary control.
antagonists muscles that cause movement in the opposite direction when they contract
rotation describes circular movement that occurs around an axis.
abduction to move away from the midline of the body.
adduction occurs when you produce a movement that moves toward the midline of the body.
extension increasing the angle between two bones connected at a joint.
extensor muscle the muscle that straightens the joint
flexion decrease the angle between two bones
flexor muscle the muscle that bends the joint
contraction shortening
contraction&relaxation movement of the body is the result of contraction(shortening) of certain muscles while there is relaxation of others
chief muscle the primary mover/agonist, causing movement, as the muscle contracts it pulls the bone causing movement
Created by: annacolon
 

 



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