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Muscular system

QuestionAnswer
what is the ability of skeletal muscles to shorten with force? contractility
what is the capability of skeletal muscles to respond to stimulus? excitability
what is the ability to be stretched? extensibility
what is the ability to be recoiled to original length after being extended? elasticity
what is the sheath of connective tissue that surrounds each skeletal muscle? epimysium
what is the layer on top of the epimysium that separates the muscles? fascia
what layer of loose connective tissue surrounds the muscle fasciculi? perimysium
the fasciculi are made of single muscle cells called? muscle fibers
each fiber is surrounded by a connective tissue sheath called? endomysium
what is the thread like structures that extend from one end of the fiber to the other? myofibrils
thin myofilaments? actin
thick myofilaments? myosin
the basic structural and functional unit of the muscle? sarcomere
a sarcomere extends between which lines? z lines
light area on striated muscle? I band
dark area of striated muscle? a band
area between a bands made of myosin? h zone
dark band in center of sarcomere/h zone made of actin? m line
outside of membrane positively charged & inside negatively charged? resting membrane potential
stimulation causes brief reversal of charge called? action potential
nerve cells that carry action potentials to skeletal muscle fibers? motor neurons
axons enter muscles and branch, each branch that connects to a muscle forms a ? synapse/neuromuscular junction
name of a single motor neuron and all skeletal muscle fibers it comes into contact with is ? motor unit
enlarged nerve terminal is called the ? presynaptic terminal
space between presynaptic terminal and muscle cell is called the ? synaptic cleft
the muscle fiber is the ? postsynaptic terminal
each presynaptic terminal contains ? synaptic vesicles
synaptic vesicles secrete a neurotransmitter called? acetylcholine
Created by: taylerwas.here
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