muscular system Flashcards
function of the muscular system
produces movement maintains posture stabilizes joints generates heat.
contractiblity
the ability to stay shortened when stimulated.
extensibility
the ability of a muscle to extend to a predetermined endpoint.
excitability
is the ability to respond to a stimulus, which may be delivered from a motor neuron or a hormone.
elasticity
general measure of the responsiveness of an economic variable in response to a change in another economic variable
tendon
a flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.
insertion
an insertion describes the point of attachment in a muscle where more movement occurs.
muscle origin
the more fixed end or attachment of a muscle.
prime mover
the largest muscle in the group creating the motion.
synergist
assisting muscle to prime mover
antagonist muscle
a separate muscle that produces an opposite movement.
sarcomere
A sarcomere is the functional unit of striated muscle. This means it is the most basic unit that makes up our skeletal muscle.
actin and myosin
Actin and myosin are both proteins that are found in every type of muscle tissue
neuromuscular junction
The neuromuscular junction is a vital link between the brain and the muscles, allowing us to move and perform various actions.
Sliding Filament Theory
The sliding filament theory explains how muscles contract at the cellular level by sliding thin and thick filaments past each other
how many atp are needed for one mysoin head to make a conenction with athe actin.
1
what are these conditions that lead to muscle fatigue
atp is no longer being used efficiently for cross bridges.
what conditions cause yours muscles too burn during exercise
muscle begin to burn causing you to stop before cells are injured.
epimysium
a sheath of fibrous elastic tissue surrounding a muscle.
perimysium
the sheath of connective tissue surrounding a bundle of muscle fibers.
perimysium
the sheath of connective tissue surrounding a bundle of muscle fibers.
Endomysium:
Endomysium is a thin layer of connective tissue that wraps around each muscle fiber in a bundle
what does a muscle need to cotnract
a muscle needs atp and electric signal from the brain and sodium/calcium
what does a muscle need to cotnract
a muscle needs atp and electric signal from the brain and sodium/calcium
what does a muscle need to cotnract
a muscle needs atp and electric signal from the brain and sodium/calcium
what does a muscle need to cotnract
a muscle needs atp and electric signal from the brain and sodium/calcium
what is the connection between muscle tone and posture
muscle works against gravity to keep body upright
what types of muscle are involuntary
cardiac and smooth
what muscle types have striations
skeletal and cardiac
