ms - vocab test 2 Flashcards
contract to produce movement **unique
contractility
respond to stimuli
irritability
antagonistic relationship exists between muscle pairs, one contracts and the opposing muscle extends. (biceps & triceps)
extensibility
can return to their original shape when relaxed
elasticity
a. involuntary
b. found in the walls of organs
c. responsible for the movements that force food through the digestive tube
d. can remain contracted the longest
smooth muscle tissue
a. involuntary
b. some striations (stripes)
c. found only in the heart
d. does not fatigue (thank goodness! J )
e. contains intercalated discs
cardiac muscle tissue
a. has striations
b. voluntary: controlled consciously
c. attached to bones for movement of limbs
d. quickest response to stimuli
e. protective
f. quickest to fatigue
skeletal muscle tissue
move from one place to another, like walking
locomotion
connective tissue that covers and binds the muscle fiber (muscle cell)
endomysium
a covering of connective tissue that binds the muscle together in a big bundle
epimysium
connective tissue that covers and binds the fascicles
perimysium
bundles of muscle fibers
fascicles
separates muscles
tendons and fascia
muscle cell
muscle fiber =
1-2 microns in diameter these make up the striations or stripes; lie parallel to each other; extend the length of the fiber.
myofibrils
thin myofilament
actin (acTIN)