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Chapter 6

Cards

QuestionAnswer
Contractility muscle shorten with force
Excitability reponse to stimulus
Extensibility stretched
elasticity recoil to orginal length
epimysium connective tissue on muscles
Fascia connective tissue outside the epimysium
perimysium loose connective tissue
fibers single muscle cells
endomysium fiber is surrounded by thiis
myofibrils Thread like structure from one end of a fiber to another
Resting membrane potential charge difference across the membrane
Action Potential brief reverseal back of the charge
Motor nerouns nerve cells that carry action potientials
synapse branch formed by muscles
motor unit single neuron in fibers
presynaptic terminal enlarged nerve terminal
Synaptic cleft between the presynaptic
postsynaptic terminal muscle fiber
synaptic vesicles secrete the acetylcholine
Muscle twitch contraction of a muscle
Lag Phase time between application of a stimulus
Contraction phase time of Contraction
Relaxation Phase muscle relaxes
Tetany Muscle remains contracted without relaxing
recruitment motor units activating
Creatine Phosphate high energy molecule
Anaerobic respiration without oxygen
Aerobic respiration with oxygen
Muscle Fatigue muscle contracts faster than can produce
isometric equal distance
isotonic equal tension
Fast twitch fatigue quickly
slow twitch contract slow
Origin head
Insertion end of muscle
belly between head and end
Occipitofrontalis raises eyebrows
bcularis oculi causes crows feet
orbicularis orbis puckers the lips
buccinator flattens cheeks
zygomaticus smiling muscleowning
levator labii superioris sneering
depressor anguli oris frowning
mastication chewing
intristic tounge shape
extrinsic movement
sternocleidomastoid prime mover
plastysma pulls mouth
erector spinae back straight
thoracic muscle move thorax
External Intercostals elevate ribs during inspiration
Internal Intercostals Contracted during forced expiration
Diaphragm accomplishes quiet breathing
Abdominal wall Muscles flex AND rotate vertebral columnn
Linea Alba tendious area of wall
rectus abdominals lines on each side of alba
Tendinous inscriptions cross rectus
Trapezius rotates Scapula
Serratus anterior Pulls Scapula Anteriorly
Pectoralis Major adducts and flexs the arm
Latissimus Dorsi medaily rotates adducts and powerfully extends the arm
Deltoid attaches the humerus to the scapula
Triceps brachii extends forearm
Biceps brachii flexes forearm anterior compartment
Brachialis flexes forearm
Brachioradialis flexes and supinates forearm
Retinaculum bracelete
Flexor Carpi flexes wrist
extensor carpi extends wrist
flexor digtorum flexes fingers
ectensor digtorum extends fingers
Gluteus Maximus Buttocks
Quadriceps femoris extends leg
Sartorius flexes thigh
Hamstring postieror thigh muscle
Achillies tendon flex toes
soleus calf
Created by: Svhs16