Kourtney Ekerss Word Scramble
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Question | Answer |
Muscle cells. | Muscle fibers |
Puckes the mouth. | Orbicularis oris |
Closes the eyelids and causes "crow feet." | Orbicularis Oculi |
Raises the eyebrows. | Occipitofrontals |
Smiling muscle. | Zygomaticus |
Flattens the Cheek. "trumpeters muscle" | Buccinator |
Frowning muscle. | Depressor Anguli Oris |
Sneering muscle. | Levator Labii Superioris |
chewing (4 prts) | Mastication, Temporalis, Masseter, and Pterygoid (2pr.-deep to mandable) |
Changes shape of the tongue | Intrinsic Tongue Muscle |
Moves the tongue | Extrinsic Tongue Muscle |
The ability to be stretched | Extensibility |
Ability to recoil to their original resting length after they have been stretched | Elasticity |
The capacity of skeletal muscle to respond to a stimulus | Excitability |
The ability of skeletal muscle to shorten with force. | Contractility |
another connictive tissue locted outside the epimysium | Fascia |
Muscle is composed of numerous visible bundles called muscle fasciculi that are surround by loose connective tissue | Perimysium |
Skeletal muscle that is surrounded by a connective tissue sheath | Epimysium |
Thick Myofilaments | Myosin Myofilaments |
Thin Myofilaments | Actin Myofilaments |
Threadlike structure that extends from one end of the fiber to another | Myofibrils |
Basic structural and functional unity of the muscle | Sarcomeres |
attachment site for actin | Z Line |
Light area that consists of actin | I Band |
Extends the lenth of the myosin | A Band |
In the center of each sarcomere is another light area | H Band |
Myosin myofilaments are anchored in the center at a dark staining band | M Line |
Brief reversal back of the charge | Action Potential |
Are 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 |
Axons enter the muscles and branch and each branch that connects to the muscle forms | Neuromusclular Junction or Synapse |
Enlarge nerve terminal | Presynaptic terminal |
Space between the presynaptic terminal and the muscle cell is | Synaptic Cleft |
Muscle fiber is | Postsynaptic Terminal |
Each presynaptic terminal contains | Synaptic Vesicles |
Synaptic Vesicles that secrete a neurotransmitter called | Acetylcholine |
Length of the muscle does not change, but the amount of tension increases during the contraction | Isometric |
The acetylchline released into the synaptic cleft into the neuron and muscle cell broken down by an enymes | Acetylcholinesterase |
As actin and myosin myofilaments slide past one another causing | Sarcomeres to shorten |
When the sarcomeres shorten it causes the | Muscle to shorten |
Sliding of actin myofilaments past myosin myofilaments during contraction is | Sliding Filament Mechanism |
Is a contraction of an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers | Muscle Twitch |
Muscle fiber will not respond to stimulus until stimulus reaches a level | Threshold |
Phenomenon is called | All-or-none response |
The time between application of a stimulus to a motor neuron and beginning of a contraction | Lag Phase |
Time of contraction | Contraction Phase |
Time during which the muscle relaxes is | Relaxation Phase |
Where the muscle remains contracted is | Tetany |
Increase in number of motor units being activated is | Recruitment |
Is needed for engery for muscle contraction | ATP(Adenosine Triphosphate) |
When muscles rest it can't stockpile APT but they can store another high-engery molecule | Creatine Phosphate |
Without Oxygen | Anaerobic Respiration |
With oxygen (more efficient) | Aerobic Respiration |
the amount of oxygen needed in chemical reactions to convert lactic acid to glucose | Oxygen Dept |
Results when ATP is used during muscle contraction faster then it can be produced in muscle cells | Muscle Fatigue |
Amount of tension produced by the muscle is constant during contraction, but the length of the muscle changes | Isotonic |
Constant tension produced by the muscles of the body for a long period of time. Keeps head up and back straight | Muscle tone |
Contract quickly and fatigue quickly | Fast-Twitch fibers |
Contract more slowly and more resistant to fatigue | Slow-Twitch fibers |
The most stationary end of the muscle | Orgin |
The end of the muscle undergoing the greatest movment | Insertion |
Portion of the muscle between the orgin and the insertion | Belly |
Muscles that work together to accomplish specific movements are | Synergists |
Muscles that work in opposition to one another are | Antagonists |
One another plays the major role in accomplishing the desired movement | Prime Mover |
Lateral neck muscle(prime mover) | Sternocleidomestoid |
Rotates and abducts the head | Lateral Neck Muscle |
(meaning a twisted neck) wry neck | Torticollis |
Single sheet like muscle that covers the antero lateral neck | Platysma |
Group of muscles on each side of the back responsible for keeping the back straight and body | Erector Spinae |
Elevate ribs during imspiration | Exteral Intercostals |
Contract during forced expiration | Internal Intercostals |
Quiet breathing | Diaphragm |
"Abs" Flexes the verebral column | Rectus Abdominis |
"white line" consists of white connective tissue | Linea Alba |
Connective tissue that crosses the rectus abdominis giving to a segmentted appearance in a muscled person | Teninous Inscriptions |
Flexes, extends, and abducts the arm | Deltoid |
Draw, scapule towards vertebral column | Rhomboids |
"chest muscles" adducts and flexes the arm | Pectpralis Major |
Pulls the scapula interiorly | Pectoralis Minor |
Created by:
Kourtneyekers
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