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wellman eastham
muscle note cards
| Question | Answer |
|---|---|
| 4 characteristics of muscles | Contracility, Excitability, Extensibility, elasticity |
| ability of muscle to shorten with force | contractility |
| capacity of skeletal muscle to respond to stimulus | excitability |
| ability to be stretched | extensibility |
| abililty to recoil to their original resting length after being stretched | elasticity |
| muscle helps to produce | heat |
| muscles help regulate and keep a normal? | body temoperature |
| skeletal muscle that is surrounded by a connective tissue sheath | epimysium |
| connective tissue outside the epimysium | fascia |
| a muscle is composed of numerous visible bundles called | fascicle |
| fascicles are surrounded by a connective tissue called | perimysium |
| fasciculi are composed of single muscle cells called | fibers |
| each fiber is surrounded by a connective tissue sheath called | endomysium |
| the cytoplasm of each fiber is filled with | myofibrilis |
| a threadlike structure that extends from one end of the fiber to the other | myofibrils |
| 2 types of myofibril protein fibers | actin myofilaments, myosin myofilaments |
| thin myofilaments that resemble pearls twisted together | actin myofilaments |
| thick myofilaments that resemble bundles of minute golf clubs | myosin myofilaments |
| actin and myosin myofilaments form highly ordered units called | sarcomeres |
| basic structural and functional unit of the muscle | sarcomere |
| the charge difference across the membrane is called | resting membrane potential |
| the brief reversal back of the charge is called | action potential |
| nerve cells that carry action potentials to skeletal muscle fibers are | motor neurons |
| each branch that connects to the muscle forms a | neuromuscular junction or synapse |
| a single motor neuron and all the skeletal muscle fibers it innervates are called | motor units |
| an enlarged nerve terminal is called | presynaptic terminal |
| the space between the presynaptic terminal and the muscle cell is | presynaptic cleft |
| the muscle fiber after the synaptic cleft is | postsynaptic terminal |
| each presynaptic terminal contains | synaptic vesicles |
| the neurotransmitter is | acetycholine |
| the acetylcholine is released into the synaptic cleft between the neuron and muscle cell is broken down by enzymes called | acetylcholinesterase |
| when does muscle contraction occur? | when actin and myosin myofilaments slide past one another causing sarcomeres to shorten |
| the sliding of actin myofilaments past myosin myofilaments during contraction is called | sliding filament mechanism |
| a cintraction of an entire muscle in repsonse to a stimulus | muscle twitch |
| the point at which the muscle fiber will contract maximally | threshold |
| the phenomenon which deals with the muscles full contraction is | all or none response |
| the time between application of a stimulus to a motor neuron and the beginning of a contraction is called | lag phase |
| 4 characteristics of muscles | Contracility, Excitability, Extensibility, elasticity |
| ability of muscle to shorten with force | contractility |
| capacity of skeletal muscle to respond to stimulus | excitability |
| ability to be stretched | extensibility |
| abililty to recoil to their original resting length after being stretched | elasticity |
| muscle helps to produce | heat |
| muscles help regulate and keep a normal? | body temoperature |
| skeletal muscle that is surrounded by a connective tissue sheath | epimysium |
| connective tissue outside the epimysium | fascia |
| a muscle is composed of numerous visible bundles called | fascicle |
| fascicles are surrounded by a connective tissue called | perimysium |
| fasciculi are composed of single muscle cells called | fibers |
| each fiber is surrounded by a connective tissue sheath called | endomysium |
| the cytoplasm of each fiber is filled with | myofibrilis |
| a threadlike structure that extends from one end of the fiber to the other | myofibrils |
| 2 types of myofibril protein fibers | actin myofilaments, myosin myofilaments |
| thin myofilaments that resemble pearls twisted together | actin myofilaments |
| thick myofilaments that resemble bundles of minute golf clubs | myosin myofilaments |
| actin and myosin myofilaments form highly ordered units called | sarcomeres |
| basic structural and functional unit of the muscle | sarcomere |
| the charge difference across the membrane is called | resting membrane potential |
| the brief reversal back of the charge is called | action potential |
| nerve cells that carry action potentials to skeletal muscle fibers are | motor neurons |
| each branch that connects to the muscle forms a | neuromuscular junction or synapse |
| a single motor neuron and all the skeletal muscle fibers it innervates are called | motor units |
| an enlarged nerve terminal is called | presynaptic terminal |
| the space between the presynaptic terminal and the muscle cell is | presynaptic cleft |
| the muscle fiber after the synaptic cleft is | postsynaptic terminal |
| each presynaptic terminal contains | synaptic vesicles |
| the neurotransmitter is | acetycholine |
| the acetylcholine is released into the synaptic cleft between the neuron and muscle cell is broken down by enzymes called | acetylcholinesterase |
| when does muscle contraction occur? | when actin and myosin myofilaments slide past one another causing sarcomeres to shorten |
| the sliding of actin myofilaments past myosin myofilaments during contraction is called | sliding filament mechanism |
| a cintraction of an entire muscle in repsonse to a stimulus | muscle twitch |
| the point at which the muscle fiber will contract maximally | threshold |
| the phenomenon which deals with the muscles full contraction is | all or none response |
| the time between application of a stimulus to a motor neuron and the beginning of a contraction is called | lag phase |
| the time of contraction is the | contraction phase |
| the time during which muscle relaxes is the | relaxation phase |
| when the muscle remians contracted without relaxing is called | tetany |
| the increase in the number of motor units being activated is | recruitment |
| what is neeeded for energy for muscles to contract? | ATP |
| ATP is produced in the | mitochondria |
| what does ATP stand for? | adenosine triphosphate |
| what does ADP stand for? | adenosine diphosphate |
| wihtout oxygen? | anaerobic respiration |
| with oxygen | aerobic respiration |
| equal distance | isometric |
| equal tension | 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 |
Created by:
jakewellman
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