Muscular System
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18 Terms
What are the 3 types of muscle tissue?
Skeletal
Cardiac
Smooth
Muscle organization levels (smallest to largest)?
Mybrofil
Muscle Fiber
Fascicle
Muscle
Connective tissues: endomysium surrounds?
Individual muscle fibers
What does perimysium surround?
Fasicles
What does epimysium surround?
The entire muscle
What proteins are involved in muscles contraction?
Actin and myosin
What role does calcium play in muscles contraction?
Binds to troponin, exposing actin for myosin to attach
What is the sarcomere?
The functional unit of a muscle fiber
What is the Z-line?
The boundary between sarcomeres
What is the M-line?
The middle of the sarcomere
What is a cross-bridge?
The myosin head attached to actin during contraction
What is the power stroke?
Myosin head pulling actin inward
What causes rigor mortis?
Lack of ATP after death, causing muscles to remain contracted
What causes muscle fatigue?
Oxygen debt and lactic acid build-up
What is the prime mover?
Main muscle responsible for a movement
What is an antagonist muscle?
Muscle that opposes the prime mover
What is the origin of a muscle?
The fixed attachment
What is the insertion of a muscle?
The movable attachment
Note 
Flashcards (56)