chapter 6 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 |
what is contractility? | ability of skeletal muscle to shorten the force |
what is excitability? | capacity of skeletal muscle to respond to a stimulus |
what is extensibility? | ability to be stretched |
what is elasticity? | ability to recoil to their original resting length after they have been stretched |
what helps heat essential for maintenance of normal body temps. ? | muscles |
each skeletal muscle is surrounded by a connective tissue called the ? | epimysium |
what is another tissue located outside the epimysium? | fascia |
composed of numerous visible bundles called muscle | perimysium |
each fiber is surrounded by a connective tissue called the | endomysium |
the cytoplasm of each fiber is filled with what? | myofibrils |
1 major kinds of protein fibers | actin myofilaments |
another major protein fiber | myosin myofilaments |
highly ordered units are called | sacromeres |
what is another name for a zline | disc |
charge difference across the membrane is called | resting membrane potential |
brief reversal back of the charge is called | action potential |
what are nerve cells that carry action potentials to skeletal muscle fibers | motor meurons |
axons enter the muscle branch. each branch connects and forms a | neuromuscular junction |
what is near the center of the cell | synapse |
single motor neuron and all the skeletal muscle fibers are called | motor unit |
enlarged nerve terminal is the what? | presynaptic terminal |
the space between the presynaptic terminal and muscle cell is the | synaptic cleft |
muscle fiber is | postsynaptic terminal |
each presynatpic terminal contains | synaptic terminal |
secrete a neurotransmitter called | acetylcholine |
sliding of actin myofilaments past myosin during contraction is called | sliding filament mechanism |
a contraction of an entire muscle in response to a stimulus | muscle twitch |
muscle fiber will not respond to stimulus until that stimulus reaches a level called | threshold |
the phenomenon is called the | all-or-none response |
beginning of a contraction is the | lag phase |
time of contraction is the | contraction phase |
time during which the muscle relaxes is the | relaxation phase |
tetany | where muscle remains contracted without relaxing |
recruitment | increase in number of motor units being activated |
atp stands for | adenosine triphosphate |
atp is | needed for energy for muscle contraction |
atp is produced in the | mitochondria |
atp is short-lived and | unstable |
adp stands for | adenosine diphosphate |
adp is more stable than atp. T or F | T |
high energy molecule | creatine phosphate |
anaerobic respiration | without oxygen |
aerobic respirtation | with oxygen |
oxygen debt | amount of oxygen needed in chemical reactions to convert lactic acid to glucose |
muscle fatigue | results when ATP is used during contraction |
1 type of muscle contraction | isometric |
define isometric | length of muscle does NOT change (equal distance) |
another type of muscle contraciton | isotonic |
define isotonic | amount of tension produced by muscles to preform metabolism |
define muscle tone | refers to constant tension produced by the body for long periods of time |
fast twitch (chicken) | white chicken meat |
slow twitch (chicken) | dark chicken meat |
origin (head) | most stationary end of the muscle |
insertion | end of the muscle undergoing the greatest movement |
belly located | between the origin and insertion |
define synergists | muscles that work together accomplish specific movements |
define antagonists | muscles that work opposition to one another |
prime mover | major role in accomplishing the movement |
muscles are named often according to location and size. T or F | T |
occipitofrontalis | raise the eyebrows |
orbicularios oculi | closes the eye lid causes crow feet |
orbicularis oris | puckers lips |
buccinator | flattens the cheeks |
zygomaticus | smiling muscles |
levator labii superioris | sneering |
depressor anguli oris | frowning |
chewing = | mastication |
4 mastication muscles | 2 ptreygoids, temporalis, masseter |
intrinsic tongue muscles | change the shape |
extrinsic tongue muscles | move the tongue |
sternocleidomastoid | lateral neck muscle and prime mover |
erector spinae | group of muscles on each side of back |
thoracic muscles | muscles that move the thorax |
most involved in breathing (2) | external intercostals and internal inter costals |
diaphragm | accomplishes quiet breathing |
dome shape muscle | aids in breathing |
Created by:
tabbykay23
Popular Anatomy sets