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muscle chapter

The ability to be stretched Extensibility
occipitofrontalis raises eyebrows
The ability of skeletal muscle to be shortened with force. contractibility
The capacity of skeletal muscle to respond to a stimulus. excitablity
ability to recoil to their original resting length after they have been stretched. elasticity
epimysium each skeletal muscles is surrounded by connective tissue sheath
zygomaticus smiling muscle
the most stationary end of the muscle origin or head
nerve cells that carry action potentials to skeletal muscle fibers motor neurons
a single motor neuron and all the skeletal muscle fibers it innervates. motor unit
what is ATP? adenosine triosphate
buttocks gluteus maximus
hip muscle commmonly called the buttox gluteus medius
muscles that work together are? synergists
levator labii superioris sneering
platysma pulls corners of lips downward
thin myofilaments actin myofilaments
thick myofilaments myosin myofilaments
where the muscle remains contracted without relaxing tetany
forehead frontalis
when the limb movs toward the body midline. adduction
movement of the bone around its longitudinal axis rotation
moving the limb away from the midline abduction
what are the three types of muscle tissue skeletal, cardiac, and smooth
what is the end of the muscle undergoing the greatest movement insertion
what is the muscle that plays the major roll in accomplishing the desired movement prime mover
what closes the eyelid orbicularis oculi
what is the buccinator flattens the cheeks
what is the depressor anguli oris sneering muscle
orbicularis oris puckers the lips
what is the stynocleidomastoid lateral neck muscle
what are the two kissing muscles obicularis oris and buccinator
chewing mastication
what are two characteristics of the cardiac muscle involtentary and not straited
what is a muscle fiber endomysium
what is a time of contraction contraction phase
when does aerobic exercise take place in the prsence of oxygen
when does anerobic exercise take place in the absence of oxygen
what are the two types of muscle contractions isometric and isotonic
what are two types of fibers fast twitch and slow twitch
muscle fibers are resistant to fatigue slow twitch
muscles that work opposite of each other antagonist
the point where the muscle fiber will contract maximally threshhold
each fiber is surrounded by a connective tissue sheath called what? endomysium
the increase in the number of motor units being activated recruitment
what is the brief reversal back of the charge action potential
what iss produced in the mitochondria ATP
what is short lived and unstable ATP
what results when ATP is used during muscle contraction faster than it can be produced muscle fatigue
what is the portion of the muscle between the origion and the insertion belly
what is the constant tension produced by muscles of the body for long periods of time muscle tone
what contracts quickly and fatigue quickly fast-twitch fibers
contracts slow slow- twitch fibers
the length of the muscle will not change but the amount of tension increases isometric
the amount of tension produced by the muscle is constant during contraction isotonic
the amount of oxygen needed in chemical reactions to covert lactic acid oxygen debt
without oxygen anaerobic respiration
with oxygen aerobic respiration
when muscles rest and they cant stockpile ATP but they can store another high energy molecule creatine phosphate
what is packaged into the organs skeletal muscle fibers
what is found in only one place in the body which is the heart cardiac muscle
deltoid abducts humerus
calcaneal tendon achilles tendon
triceps arm muscle
trapezius extends neck and adducts scapula
erector spinae extends back
latissimus dorsi extends and adducts humerus
soleus arises on the tibia
gastronemius forms the curved calf on the posterior leg
extensor digitorium arises from the lateral tibialis
sartorius compared to other thigh muscles described here, the thin, straplike sartorius
sternocleidomastoid muscles are two-headed muscles, one found on each side of the neck
when the fascicals arranged in conconcentric circular
fascicles converge toward a single insertion tendon convergant
the length of the fascicles run parallel to the long axis of the muscle parallel
short fasciclas attach obliquely to the central tendon pennate
Created by: corrie_herrick