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Stack #784237

The ability of the skeletal muscles to shorten with force. Contractility
Each muscle is surrounded by a connective tissue sheath called_________ Epimysium
Myofibrils consist of 2 major kinds of protien fibers: ________ & ________ Actin Myofilaments & Myosin Myofilaments
These muscles raise the eyebrows Occipiofrontalis
Nerve cells that carry action potentials to skeletal muscle fibers Motor Neurons
The acetylcholine released into the synaptic cleft between the neuron and the muscle cell is rapidly broken down by an enzyme Acetylcholinesterase
Neede for energy for muscle contraction ATP
Is a contraction of an entire muscle Muscle Twitch
Muscle cells Muscle fibers
Results when ATP is used during muscle contraction faster then it can be produced in the muscles. Muscle Fatigue
The constant tension produced by muscles of the body for a long period of time. Muscle Tone
The most stationary end of the muscle Origin
Move the vertebral column Trunk Muscle
Flexes the vertebral column Rectus abdominis
Muscles that work together to accomplish specific movements Synergists
The basic structural and function unity of the muscle made up of actin and myosin myofliamnets Sacromere
The length of the muscle does not change, but the amount of tension increases during the contraction. Isometric
Characteristics of the skeletal muscles Excitability, elasticity, contractility, and extensibility
Connective tissue that seperates muscles and surrounds the epimysium is called_____ Fascia
Extends from a Z line to the next, has a H-zone in the center, and contains overlapping actin and myosin Sacromere
The condition in which a muscle remains contracted without relaxing is called_____ Tetany
A high energy molecule that can be quickly used to produce ATP creatin phosaphate
If someone winks at you, they are using the_______ Orbicularis Oculi
Muscle responsible for elevating the ribs during respiration External Intercostals
Hip Muscle Gluteus maximus
An anterior thigh muscles that extends the leg Quadriceps Femoris
Muscle fiber is surrounded by Endomysin
2 layers that surround the muscle epimysin and perimysin
A contraction of an entire muscle in response to stimulus muscle twitch
Occurs in the presence of oxygen Areobic respiration
2 muscle disorders cramps and hypertrophy
muscle fibers fatigue quickly Fast twitch
The most stationary end of the muscle origin or head
Muscles that work together synergists
Sneering is accomplished by _________ levator labii superiois
Muscle Fibers that are resistant to fatigue Slow Twitch
The end of the muscle attached to the bone undergoing the greatest movement Insertion
Group of muscles on each side of the back Erector Spinae
Flexes the vertebral column Rectus abdominis
flexes, extends, and abducts the arm deltoid
Single sheet-like muscle that covers the anterolateral neck Platsyma
Chest muscle that abducts and flexes the arm Pectoralis major
The portion of the muscle between the origin and the insertion Belly
Arm attached to the thorax by Pectoralis major and lattimus dorsii
Attaches humeurs to the scapula Rotators Cuff Muscle
Adducts the thigh Adductor muscle
Forms the bulge of the calf Gastrocnemius and soleus
Lateral muscle of the leg Peroneus
flexes the wrist Flexor Carpi
flexes the fingers Flexor Digitorum
covers flexors and extensors and holds them in place Retinaculum
Extends wrist Extensor Carpi
Extends fingers Extensor digitorum
Branch that conncts to muscle Neuromusclar Junction
A muscle fiber will not respond to stimulus until that stimulus reaches a level called________ Threshold
The sliding of action and myosin myofilaments during contraction is called _______ sliding filament mechanism
The increase in number of motor units being activated is called_______ recruitment
A single motor neuron and all the skeletal muscle fibers it innervates motor unit
The spcae between the persynpatic terminal and muscle cell Synaptic Cleft
An enlarged nerve terminal Persynaptic terminal
Created by: Brandi_Boltz