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muscle chapter
| Question | Answer |
|---|---|
| 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
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