Ch.6 Skeletal Muscle Word Scramble
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Question | Answer |
ability to shorten with force | contractility |
the capacity to respond to a stimulus | excitability |
the ability to be stretched | extensibility |
ability to recoil to the original resting length | elasticity |
each skeletal muscle is surrounded by a connective sheath called | epimysium |
another connective tissue located outside the epimysium, surrounds and separates muscle | fascia |
muscle is composed of bundles called | fascicle |
fascicle is surrounded by a loose connective tissue called | perimysium |
muscle cells | fibers |
surrounds each muscle fiber | endomysium |
cytoplasm of each fiber | myofibrils |
thin myofilaments. 2 strands of pearls twisted together | actin myofilaments |
thick myofilaments. bundles of minute golf clubs | myosin myofilamentd |
actin and myosin myofilaments form highly ordered units called | sacromeres |
nerve cells that carry action potentials to skeletal muscle fibers | motor neurons |
branch that connects to the muscle forms a | synapse |
single motor neuron | motor unit |
enlarged nerve terminal | presynaptic terminal |
the space between the presynaptic terminal and the muscle cell | synaptic cleft |
secretes acetylcholine | synaptic vesicles |
acetylcholine | movement juice |
acetycholinesterase | non movement juice |
contraction of an entire muscle | muscle twitch |
a muscle fiber will not respond to stimulus to a motor neuron and beginning of a contraction | lag phase |
muscle flexes without relaxing | tetany |
increase in number of motor units being activated | recruitment |
energy needed for muscle contraction, produced in mito., short lived | ATP |
more stable energy | ADP |
Energy when ATP is low | creatine phosphate |
without oxygen | anaerobic respiration |
with oxygen | aerobic respiration |
the amount of oxygen needed in chemical reactions | oxygen debt |
when ATP is used up quicker than it is being produced | muscle fatigue |
Type of muscle contraction when you're holding a ball | isometric |
type of muscle contraction when you throw a ball | isotonic |
tension used to hold your head up | Muscle tone |
muscle for sprinters and chicken breast | Fast-twitch fibers |
muscle for long distance and chicken legs | Slow-twitch fibers |
stationary end of the muscle | origin (head) |
end of the muscle undergoing the greatest movement | insertion |
part of the muscle between the origin and insertion | belly |
muscles that work together to accomplish specific movements | synergists |
muscles that work in opposition to one another | antagonists |
one muscle in a group of synergists that plays the major role in movement | prime mover |
raises the eyebrows | occipitofrontalis |
closes the eyelids and causes "crows feet" | orbicularis oculi |
puckers the lips | orbicularis oris |
flattens the cheek | buccinator |
smiling muscle | zygomaticus |
sneering | levator labii superioris |
frowning | depressor anguli oris |
4 pairs of mastication muscles | 2 pairs of pterygoids, temporalis, and masseter |
changes the shape of the tongue | intrinsic tongue muscles |
move the tongue | extrinsic tongue muscles |
lateral neck muscle and prime mover. rotates and adducts the head | sternocleidomastoid |
downward sag of the mouth | platysma |
keeps the body erect and straight | erector spinae |
muscles that move the thorax | thoracic muscles |
most involved in breathing | external and internal intercostals |
elevate the ribs during inspiration | external intercostals |
contract during forced expiration | internal intercostals |
dome shaped, quiet breathing | diaphram |
vertical indention from naval to pubis | linea alba |
each side of the linea alba | rectus abdominis |
crosses the rectus abdominis, creating sections (abs) | tendinous inscriptions |
rotates scapula | trapezius |
pulls scapula anteriorly (in front of) | serratus anterior |
attatches the arm to the thorax | pectoralis major and latissimus dorsi muscles |
adducts and flexes the arm | pectoralis major |
medially rotates, adducts, and extends the arm (swimmer muscles) | latissimus dorsi |
attaches the humerus to the scapula and clavical | deltoid |
extends the forearm (posterior) | triceps brachii |
flexes the forearm (anterior) | biceps brachii |
flexes forearm | brachialis |
flexes and supinates the forearm | brachioradialis |
flexor and extensor tendons around the wrist | retinaculum (bracelet) |
flexes the wrist | flexor carpi |
extends the wrist | extensor carpi |
flexes the fingers | flexor digitorum |
extends the fingers | extensor digitorum |
intrinsic hand muscles | |
responsible for abduction and adduction of the fingers, between the metacarpols | interossi |
buttocks | gluteus maximus |
hip muscle | gluteus medius |
extends the leg, anterior thigh muscles | quadriceps femoris |
flexes the thigh, tailors muscle | sartorius |
flexes the leg and extends the thigh | hamstring |
calf muscle | gastrocnemius and soleus |
flex the foot and the toes | achilles tendon |
turns the foot outwards | peroneus |
20 muscles in the foot | intrinsic foot muscles |
Created by:
Ashleemae
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