Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Muscles12345
anatomy test
| Question | Answer |
|---|---|
| The ability of skeletal muscle to shorten with force | contractility |
| 2 major kinds of protein fibers | actin and myosin |
| What is extensibility? | the ability to be stretched |
| The capacity of skeletal muscle to respond to a stimulus | excitability |
| The ability to recoil to their original resting length after they have been stretched | elasticity |
| Connective tissue shealth that surrounds each skeletal muscle | epimysium |
| connective tissue locate outside the epimysium | fascia |
| What are fibers? | Fasciculi that are composed of single muscle cells |
| Connective tissue sheath that that surrounds each fiber | endomysium |
| myofibrils | A threadlike structure that extends from one end of the fiber to the other |
| It resembles two strands of pearls | actin |
| It resembles bundles of minute golf clubs | myosin |
| Actin and myosin form highly ordered units called | sacromeres |
| Extends from Z line to Z line | sarcromere |
| A bands contain | myosin |
| I bands contain | actin |
| The space between the A bands is called the | H zone |
| Nerve cells that carry action potentials to skeletal muscle fibers | motor neurons |
| The charge difference across the membrane is called the | resting membrane potential |
| The brief reversal back of the charge is called | action potential |
| A single motor neuron and all the skeletal muscle fibers it innervates | motor unit |
| presynaptic terminal | the enlarged nerve terminal |
| the space between the presynaptic terminal and the muscle cell | synaptic cleft |
| postsynaptic terminal | the muscle fiber |
| acetylcholine | a neurotransmitter in the presynaptic terminals |
| acetylcholinesterase | when the acetylcholine is released into the synaptic cleft between the neuron and muscle cell |
| The sliding of actin myofilaments past myosin myofilaments during contraction | sliding filament mechanism |
| muscle twitch | a contraction of an entire muscle in response to a stimulus |
| threshold | the point at which the muscle fiber will contract maximally |
| the time between application of a stimulus to a motor neuron | lag phase |
| the time of the contraction | contraction phase |
| the time during which the muscle relaxes | relaxation phase |
| tetany | where the muscle remains contracted without relaxing |
| recruitment | the increase in number of motor untis being activated |
| anaerobic respriation | without oxygen |
| aerobic respiration | with oxygen |
| oxygen debt | the amount of oxygen needed in chemical reactions |
| muscle fatigue | results when ATP is used more than it can be produced |
| isometric | equal distance |
| isotonic | equal tention |
| muscle tone | constant tension produced by the muscles of the body |
| fast-twitch fibers | contract quickly and fatigue quickly |
| slow-twitch fibers | contact slowly and fatigue slower |
| origin | the most stationary end of the muscle |
| insertion | the end of the muscle undergoing the most movement |
| belly | the portion of the muscle between the origin and the insertion |
| synergists | muscles that work together to accomplish specific movements |
| antagonists | muscles that work in opposition of each other |
| the muscle that plays a major role accomplishing a movement | prime mover |
| occipitofrontales | raises the eyebrows |
| closes the eyelid | orbicularis oculi |
| puckers the lips | orbicularis oris |
| flatens the cheeks | buccinator |
| zygomaticus | smiling |
| levator labii superioris | sneering |
| depressor anguli oris | frowning |
| mastication | chewing |
| extrensic tongue muscle | moves the tongue |
| intrinsic tongue muscle | changes the shape of tongue |
| sternocleidomastoid | rotates and abducts neck |
| erector spine | found on each side of the back responsible for posture |
| external intercostals | contract during inspiration |
| internal intercostals | contract during forced expiration |
| diaphragm | dome-shaped muscle that is responsible for quiet breathing |
| rectus abdominus | abs |
| linea alba | connective tissue that extends from the sternum to the pubis |
| tendinous inscription | cross the rectus abdominus in 3 places and form a segmented look in the abs |
| external abdominal obliques | internal and transverse |
| deltoid | attaches the humerus to the scapula and clavicle |
| flexor carpi | flexes the wrist |
| extensor carpi | extends the wrist |
| flexor digitorum | flexes the fingers |
| extensor digitorum | extends the fingers |
| gluteus maximus | buttocks |
| quadriceps femoris | extends the leg |
| sartorius | flexes the thigh |
Created by:
BigAl24
Popular Anatomy sets