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
muscles that turn the palm upward
supinators
muscles that turn the palm downward
pronators
raise a part of the body
levators
lower a part of the body
depressors
muscles that bring about an action
prime movers
assists the prime movers
synergists
