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Ch.6 Muscle

The ability of skeletal muscle to shorten with force. What is Contractility.
The capacity of skeletal muscle to respond to a stimulus. What is Excitability.
The ability to be stretched. What is extensibility.
Ability to recoil to their original resting length after they have been stretched. What is elasticity.
Each skeletal muscle is surrounded by a connective tissue sheath called. What is Epimysium.
Another connective tissue located outside the epimysium. It surrounds and separates muscles. What is fascia.
Muscle composed of numerous visible bundles What is muscle fascicle.
Muscle surrounded by loose connective tissue What is Perimysium.
The fascicle are composed of single muscle cells What is Fibers.
Muscle Cells What is Muscle Fibers.
Buttocks What is Gluteus Maximus.
Chest Muscle What is Pectoral Muscle.
Anterior thigh muscle What is Quadriceps Femoris.
Posterior thigh muscle What is Hamstrings.
Top arm muscle What is Bicep
Bottom arm muscle What is Tricep
ATP What is Adenosine Triphosphate
ADP What is Adenosine Diphosphate
Creatine Phosphate What is High-energy molecule
Anaerobic respiration Without oxygen
Aerobic respiration With oxygen (more efficient)
Isometric (Equal Distance) - Amount of tension increases during the contraction process
Isotonic (Equal Tension) - But the length of the muscle changes
Muscle tone Keeps head up and back straight
Fast twitch fibers Contract quickly and fatigue quickly
Slow twitch fibers Contract more slowly and are more resistant to fatigue
Origin Most stationary end of the muscle
Insertion Muscle undergoing the greatest movement
Belly Portion of muscle between the origin and insertion
Synergists Muscles that work together to accomplish specific movements
Antagonists Muscles that work in opposition
Occipitofrontalis Raises the eyebrows
Prime Mover Muscle that plays a major role among a group of synergists
Orbicularis oculi Closes the eyelids and causes "crows feet"
Orbicularis oris Puckers the lips
Buccinator Flattens the cheeks
Orbicularis oris/ Buccinator Kissing muscles
Zygomaticus Smiling muscle
Levator labii superioris sneering
Depressor anguli oris frowning
Mastication Chewing
Intrinsic tongue muscles change the shape of the tongue
Extrinsic tongue muscles move the tongue
Trapezius Rotates scapula
Serratus anterior pulls scapula anteriorly
Pectoralis major Adducts and flexes the arm
Latissimus dorsi Medially rotates, adducts, and powerfully extends the arm
Deltoid Attaches the humerous to the scapula and clavicle
Triceps brachii extends the forearm
Biceps brachii Flexes the forearm, Occupies the anterior compartment of the arm
Brachialis Flexes forearm
Brachioradialis Flexes and supinates the forearm
Flexor carpi Flexes the wrist
Extensor carpi Extends the wrist
Flexor digitorum flexes the fingers
Extensor digitorum Extends the fingers
Sartorius Flexes the thigh
Sliding filament mechanism the sliding of actin myofilaments past myosin myofilaments during contraction
Muscle twitch Contraction of an entire muscle in response to a stimulus
Threshold muscle fiber will not respond to stimulus until that stimulus reaches a level
Lag phase time between application of a stimulus to a motor neuron and the beginning of a contraction
contraction phase time of contraction
Relaxation phase time during which the muscle relaxes
Tetany muscle remains contracted without relaxing
recuitment increase in number of motor unit being activated
Created by: Dalton Willis