muscular system Flashcards
list the 3 muscle types
skeletal, smooth or visceral, cardiac
muscles make up ___ to ___ of our body weight
40%, 50%
2 types of involuntary muscle
smooth & cardiac
___ bands represent actin
I
___ bands represent myosin
A
muscle cell
sarcomere
2 places to find smooth muscle
intestines & bladder
motor neuron + muscle cell innervates
motor unit
4 properties/stages of contraction
excitability, conductivity, contractility, elasticity
during resting potential, there is a ___ charge outside
positive
a sarcomere goes ___ to ___
z line, z line
___ is the technical term for chewing
mastication
muscles can be named according to their ..
action, shape, origin & insertion, location, direction of their fibers
more fixed attachment of a muscle
origin
movable attachment of a muscle
insertion
attach a muscle to a bone
tendons
a wide flat tendon
aponeurosis
muscles that bend a limb at a joint
flexors
muscles that straighten a limb
extensors
move a limb away from the midline
abductors
bring a limb toward the midline
adductors
revolve a limb around an axis
rotators
muscles that raise the foot
dorsiflexors
muscles that lower the foot
plantar flexors
