zaina assi Word Scramble
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Question | Answer |
muscle cells | muscle fibers |
muscle responsible for smiling | zygomaticus |
contractility | the ability of skeletal muscle to shorten with force |
fascia? | located outside the epimysium. it surrounds and separates the muscle. |
excitability | the capacity of skeletal muscle to respond to a stimulus. |
extensibility | the ability to be stretched |
elasticity | ability to recoil to their original resting length after they have been stretched |
perimysium | loose connective tissue that surrounds the fascicle. |
endomysium | the fiber surrounded by the connective tissue. |
myofibrils | a threadlike structure that extends from one end of the fiber to the other. |
actin myofilaments | thin myofilaments that resemble 2 minute strands of pearls twisted together. |
myosin myofilaments | thick myofilaments that resemble bundles of minute golf club. |
sarcomeres | actin and myosin myofilaments that form highly ordered units. |
resting membrane potential | the charge difference across the membrane. |
action potential | the brief reversal back of the charge. |
motor neurons | nerve cells that carry action potentials to skeletal muscle fibers. |
motor unit | a single motor neuron and all the skeletal muscle fibers innervates. |
the space between the presynaptic terminal and the muscle cell is the? | synaptic cleft |
each presynaptic terminal contains? | synaptic vesicles |
what happens when the sarcomeres shorten? | it causes the muscle to shorten. |
muscle twitch | is a contraction of an entire muscle in response to a stimulus that causes the action potential i one or more muscle fibers. |
when a muscle fiber does not respond to stimulus that stimulus reaches a level called? | threshold |
all-or-none response | the point where the muscle fiber will contract maximally. |
lag phase | the time between application of a stimulus to a motor neuron and the beginning of a contraction. |
a high energy molecule that can be quickly used to produce ATP | creatine phosphate |
cardiac muscle | is under involuntary control |
buttocks | gluteus maximus |
the eyebrow muscle is the | orbicularis oculi |
anterior high muscle that extends the leg is the | quadriceps femoris |
muscle twitch | is a contraction of an entire muscle in response to a stimulus |
the time of contraction is the | contraction phase |
the muscles that relaxes is the | relaxation phase |
tetany | the condition where a muscle remains contraction without relaxing |
aerobic resperation | occurs in the presence of oxygen |
anerobic repiration | occurs in the absence of oxygen |
two types of muscle contractions | isotonic and isometric |
the most stationary end of a muscle | head |
two types of tongue muscles | intrinsic and extrinsic |
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zaina17
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