CH. 6 MUSCLES Word Scramble
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Question | Answer |
Contraction | to shorten or develop muscle tension |
Muscle Fibers | muscle cells |
Skeletal Muscle | muscles attached to skeleton |
Endomysium | thin connective tissue surrounding each cell |
Perimysium | connective tissues enveloping bundles of muscle fibers |
Epimysium | sheath of fibrous connective tissue surrounding muscles |
Fascicle | bundle of nerve or muscle fibers bound together by connective tissue |
Smooth Muscle | muscle unstriped and spine shaped; involuntary |
Cardiac Muscle | heart muscle |
Sarcolemma | fine, transparent, tubular sheath that envelops the fibers of skeletal muscles |
Sacomere | extends from one Z disc to the next |
Myosin | principle contractile proteins found in muscle |
Actin | contractile protein |
Sarcoplasmic reticulum | network of tubular or saclike channels in cytoplasm of muscle cells |
Motor Unit | motor neuron and all the muscle cells it supplies |
Axon | conducting portion of a nerve cell |
Acetylcholine | chemical transmitter substance released by certain nerve endings |
Muscle fatigue | decline in ability to use muscles |
Isotenic | having tension of the same tone |
Isometric | of the same length |
Origin | muscle that remains fixed during muscle contractions |
Insertion | moveable attachment of muscle opposed to its origin |
Synergists | muscles working with other muscles to produce movements |
Antagonists | muscles that work against movements |
Fixators | muscles acting to immobilize a joint or a bone |
Contractility | skeletal muscle to shorten with force |
Excitability | the capacity of skeletal muscle to respond to a stimulus |
Extensibility | the ability to be stretched |
Elasticity | ability to go back to its original form after being stretched |
Muscle twitch | contraction of entire muscle in response to a stimulus that causes the action |
Contraction phase | time of contraction |
Relaxation phase | times when muscles are relaxed |
Tetany | muscle remains contracted without relaxing |
Recruitment | increase in number of motor units activated |
Creatine Phosphate | found in vertebrate muscle, where it serves to store phosphates to provide energy for muscular contraction |
Anaerobic respiration | without oxygen |
Aerobic respiration | with oxygen |
Oxygen Debt | amount of oxygen needed in chemical reactions to replenish muscle cells |
Muscle Tone | constant tension produced by muscles of the body for long periods of time |
Fast- twitch Fibers | contract quickly and fatigue quickly |
Slow- twitch Fibers | contract slowly and are more resistant to fatigue |
Belly | portion of muscle between its origin and the insertion |
Prime mover | one muscle that plays the major role |
Ways to classify muscle names | location, size, shape, orientation of fibers |
Occipitofrontalis | raises the eyebrows |
Orbicularis oculi | closes the eyelids and causes "crows feet" wrinkles |
Orbicularis oris | puckers lips |
Buccinator | flattens cheeks |
Zygomaticus | smiling muscle |
Levator Labii Superioris | sneering |
Depressor Anguli Oris | frowning |
Mastication | chewing |
4 pairs of mastication muscles | 2 pairs of pterygoids, temporalis, and masseter |
Intrinsic Tongue Muscles | changes shape of tongue |
Extrinsic Tongue Muscles | move the tongue |
Sternocleidomastoid | lateral neck muscle and prime mover; rotates and abducts head |
Erector Spinae | group of muscles on each side of the back; responsible for keeping it straight and the body erect |
Thoracic Muscles | muscles that move the thorax |
External intercostals | elevate the ribs during inspiration |
Internal intercostals | contract during forced expiration |
Diaphragm | accomplishes quiet breathing |
Abdominal Wall Muscles | flex and rotate the vertebral column, compresses abdominal cavity, and holds abdominal viscera |
Linea alba | vertical linear identification extending from sternum through the navel, to the pubis |
Trapezius | rotates scapula |
Serratus anterior | pulls scapula anteriorly |
Pectoralis major | adducts and flexes the arm |
Latissimus dorsi | medically rotates, adducts, and powerfully extends the arm |
Deltoid | attaches humerus to the scapula and clavicle |
Triceps brachii | extends forearm |
Biceps brachii | occupies anterior compartment of the arm |
Brachialis | flexes forearm |
Retinaculum | band of connective tissues that cover the flexor and extensor tendons |
Flexor carpi | flexes wrist |
Extensor carpi | extends wrist |
Flexor digitorum | flexes fingers |
Created by:
kimster_52
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