Haley Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
contractility | ability of skeletal muscle to shorten with force |
excitability | capacity of skeletal muscle to respond to a stimulus |
extensibility | ability to be stretched |
elasticity | to recoil to their original resting length after being stretched |
skeletal muscle surrounded by connective tissue sheath | epimysium |
fascia | connective tissue located outside the epimysium surrounds and separates muscles |
perimysium | muscle composed of numerous visible bundles surrounded by loose connective tissue |
fibers | fasciculi composed of single muscle cells |
endomysium | each fiber surrounded by connective tissue sheath |
myofibrils | structure extends from one end of the fiber to the other |
sarcomeres | basic structural and functional unit of the muscle. joined end to end to form myofibril |
anaerobic respiration | without oxygen |
aerobic respiration | with oxygen |
muscle fatigue | atp is used when muscle contraction is faster than it can be produced in muscle cells |
isometric | equal distance. length of muscle does not change but amount of tension increase during contraction process |
isotonic | equal tension. tension produced when muscle is constant during contraction but the length of muscle changes. |
muscle tone | constant tension produced by muscles of the body for long periods of time |
fast twitch fibers | contracts quickly and fatigues quickly. ex white meat chickens breast |
slow twitch fibers | contracts slowly and are more resistant to fatigue . ex dark meat ducks breast and leg of chicken |
origin | most stationary end of the muscle |
insertion | end of the muscle undergoing the greatest movement |
belly | portion of muscle between origin and insertion |
synergist | muscle works together to accomplish specific movements |
antagonists | muscles that work in opposition to one another |
prime mover | plays a major role in accomplishing the desired movement |
actin myofilaments | thin myofilaments 2 min strands of pearls twisted together |
myosin myofilaments | thick myofilaments resemble bundles of min golf clubs |
resting membrane potential | charge difference across the membrane |
action potential | brief reversal back of the charge |
motor neurons | nerve cells that carry action potentials to skeletal muscle fibers |
each branch that connects to the muscle | neuromuscular junction |
near the center of the cell | synapse |
enters the muscles and branch | axons |
single motor neuron and all the skeletal muscle fibers it innervates | motor unit |
space between the presynaptic terminal and the muscle cell | synaptic cleft |
muscle fibers that don't respond to stimulus until that stimulus reaches a level which point the muscle fibers will contact maximally | threshold |
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 | relaxation phase |
where muscle remains contracted without relaxing | tetany |
increase in number of motor units being activated | recruitment |
occipitofrontalis | raise the eyebrows |
orbicularis oculi | close the eyelids wrinkles in the corner of eye |
orbicularis oris | puckers the lips |
buccinator | flattens the cheeks |
kissing muscles | orbicularis oris and buccinator |
zygomaticus | smiling muscle |
levator labii superioris | sneering |
depressor anguli oris | frowning |
mastication | chewing |
change the shape of the tongue | intrinsic tongue muscles |
move the tongue | extrinsic tongue muscles |
sternocleidomastoid | lateral neck muscle and prime mover. rotates and abducts the head |
erector spinae | group of muscles on each side of the back |
muscles that move the thorax | thoracic muscles |
trapezius | rotates scapula |
serratus anterior | pulls scapula anteriorly |
pectoralis major | adducts and flexes the arm |
latissimus dorsi | swimmer muscles. rotates, adducts, and powerfully extends arm |
deltoid | attaches humerus to the scapula and clavicle |
triceps brachii | extends forearm occupies posterior compartment of the arm |
biceps brachii | flexes the forearm occupies anterior compartment |
brachialis | flexes forearm |
branchioradialis | 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 |
gluteus maximus | buttocks hip muscle and common injection site |
quadriceps femoris | extends the leg anterior thigh muscles |
Sartorius | tailors muscle flexes the thigh |
hamstring muscles | posterior thigh muscle flexes the leg and extends thigh |
gastrocnemius and soleus | form the calf muscle |
lateral muscles of the leg | peroneus |
20 muscles located in the foot | intrinsic muscle |
Created by:
haygrace
Popular Anatomy sets