Muscular System Flashcards
Ability to contract or SHORTEN and make movement possible
Muscle tissue
3 types of muscle tissue
Smooth
Cardiac
Skeletal
the structural and functional unit of skeletal muscle
Muscle fibers
what kind of movement does the muscular system do
Pulling movement
needed for the muscle to shorten
Can be voluntary or involuntary
Stimulus
the skeletal muscle makes up to how many percent of our body weight
40% of our body weight
-striated
-attached to skeleton
-voluntary movement
Ability to lengthen passively
Contractility
Ability to RESPOND to stimulus
Excitability
ability to be stretched and BEYOND a limited degree
Extensibility
ability to RECOIL
elasticity
what are the 3 muscle tissue covering (skeletal muscle structure) wire example
Epimysium(fascia)
Perimysium(fasciculi)
Endomysium
Covers each skeletal muscle
Epimysium (fascia)
Divides muscles into bundles
Perimysium- Fasciculi
Subdivides each fascicle into muscle fibers
Endomysium
2 protein myofilaments
Actin (Thin)
Mysoin (thick)
Spindle shaped
Non striated
Less actin and myosin
Contracts slowly
Cannot be controlled but only the nervous system
Smooth muscle
Branching
Striated
Autorhythmic contraction
Cardiac muscle
Cardiac muscle are connected to each other by
intercalated disc
muscle to bone
Tendon
Bone to bone
Ligament
Also called the head, is the most stationary end of the muscle
Origin
End of the muscle attached to the bone undergoing the greatest movement.
Insertion
Between the origin and the insertion: the bulk
Belly
A muscle that accomplishes a certain movement, such as flexion
Agonist
