MUSCULAR 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 |
Sliding of myofilaments past myosin filaments during contraction | sliding filament mechanism |
contraction of entire muscle in response to a stimulus | muscle twitch |
where muscles remain contracted without relaxing | tetany |
the time between application of stimulus to a motor neuron and beginning of a contraction | lag phase |
raise the eyebrows | occipitofrontalis |
close the eyelids causes crows feet | orbicularis oculi |
pucker the lips | orbiculars oris |
flattens the cheeks/ kissing muscles | buccinator |
smiling muscle | zygomaticus |
sneering | levator labii superioris |
frowning | depressor anguli oris |
2 pterygoids, temporalis, masseter | 4 pairs of mastication muscles |
chewing | mastication |
change the shape of the tounge | intrinsic tonuge muscles |
move the tongue | extrinsic tongue muscles |
lateral neck muscle and prime mover | sterncleidomastoid |
group of muscles on each side of the back | erector spinae |
muscles that move the thorax | thoracic muscles |
elevate the ribs during inspiration | external intercostals |
contract during forced expiration | internal intercostals |
accomplishes quiet breathing | diaphragm |
skeletal muscle responds to a stimulus | excitability |
the ability to be stretched | extensibility |
ability to recoil to their original resting length after they have been stretched | elasticity |
skeletal muscle is surrounded by a connective tissue sheath called | epimysium |
surrounds and separates muscles: outside the epimysium | fascia |
numerous visible bundles: surrounded by the perimysium | fascicle |
the fascicle is composed of single muscle cells called | fibers |
each fiber is surrounded by a sheath called | endomysium |
the cytoplasm of each fiber is filled with threadlike structures called | myofibrils |
thin myofliamnets | actin myofilaments |
thick myofilaments | myosin filaments |
actin and myosin filaments form the basic structural unit of the muscle | sarcomeres |
extends from one Z line to another | sarcomere |
band on each side of the Z line | I band |
darker central region in each sarcomere | A band |
center of each sarcomere: light area of only myosin | H zone |
myosin myofilaments are anchored in the center of the sarcomere at a dark staining band | M line |
charge difference across the membrance | resting membrane potential |
nerve cells that carry action potentials to skeletal muscle fibers | motor nuerons |
Each axon branch that connects to the muscle forms a | synapse |
single motor neuron and all the skeletal muscle fibers it innervates are calle | motor unit |
formed by an enlarged nerve terminal resting in an indentation of the muscle cell membrane | neuromuscular junction |
The enlarged nerve terminal | presynaptic terminal |
space between the presynaptic terminal and the muscle cell | synaptic cleft |
muscle fiber in the synaptic cleft | postsynaptic terminal |
each presynaptic terminal contains | synaptic vesiciles |
secretion from vesicles that are a neurotransmitter | acetycholine |
enzyme that breaks down acetylcholine | acetylcholinesterase |
muscle fiver will not respond to stimulus until it reaches the | threshold |
threshold phenomenon is called | all or none response |
time of contraction | contraction phase |
time when muscle relaxes | relaxation phase |
The increase in number of motor units being activated | recruitment |
needed for energy for muscle contraction. | ATP adenosine triphosphate |
muscles can store another high-energy molecule | creatine phosphate |
without oxygen | Anaerobic respiration |
with oxygen | Aerobic respiration |
amount of oxygen needed in chemical reactions to convert lactic acid to glucose | oxygen debt |
results when ATP is used during muscle contraction faster than it can be produced | muscle fatique |
the length of muscle does not change but the tension increases | isometric |
length of muscle changes but tension stays the same | isotonic |
constant tension produced by muscles of the body for long periods of time. | muscle tone |
contract quickly and fatigue quickly | fast twitch fibers |
contract more slowly and are more resistant to fatigue | slow twitch fibers |
most stationary end of the muscle | origin |
the end of the muscle undergoing the greatest movement | insertion |
portion of the muscle between the origin and the insertion | belly |
Muscles that work in opposition to one another | antagonists |
group of synergists, if one muscle plays the major role in accomplishing the desired movement | prime mover |
descriptive names of muscles | location, size, orientation, insertion, function |
lateral neck muscle | sternocleidomastoid |
group of muscles on each side of back | erector spinae |
accomplishes quiet breathing | diaphragm |
elevates ribs during inspiration | external intercostals |
contract during forced expiration | internal intercostals |
Created by:
zcaitlyn
Popular Biology sets