chapter 6 Flashcards
Does a single muscle fiber must contract completely when activated?
yes
What portion of the muscle contracts to bring movement?
Myofilaments
Lighter colored band of the skeletal muscle?
I
Part of the hamstring group
Biceps fermoris, semimembranosus, semitendinosus
Gap between the nerve and muscle
synaptic cleft
Chemical that causes our muscles to be sore
lactic acid
What point of muscle attachment is the moveable bone?
Insertion
Closes eyes, squints, blinks, winks
Orbicularis Oculi
Closes the jaw by raising the mandible
masseter
Closes mouth, puckers lips
Orbicularis Oris
Lowers the corners of the mouth
Platysma
Raises the corners of the mouth
zygomaticus
Raises the eyebrows
frontalis
Rotates head
Sternocleidomastoid
Flattens cheek, moves food from cheek during chewing
Buccinator
Joined with others at an intercalated disc
Cardiac
Voluntary
Skeletal
Lack striations
Smooth
Located around many hollow organs
smooth
Located in the heart
Cardiac
Multinucleate
Skeletal
Spindle-shaped
smooth
Tires easily
skeletal
Movement away from body
abduction