top hat quiz Flashcards
during muscle contraction what happens to the length of a sarcomere
shorten
a protein that is not part of myofliaments
myoglobin
what are the general functions of muscle
body movement
maintain posture
create heat
calcium triggers the contraction of a muscle fiber. where in the muscle fiber is this calcium stored
sarcoplasmic reticulum
a motor neuron plus the muscle fibers to which it attaches consistites a functional unit called a
motor unit
if the magnitude of the local depolarization surpasses a limit called the blank at the axon hillock voltage gated NA+, channels, and K+ channels are stimulated to open an action potential is generated
threshold potential
before being released neurotransmitters are stored in the
vesicles in the axon terminal ending
under what condition can a nerve fiber be repaired
neurilemma and cell body are intact
which type of synapse uses a neurotransmitter to send signals from the presynaptic cell to the postsynaptic cell
chemical
between stimulus and response what is the correct flow of signal conduction in a reflect arc
afferent neuron->interneuron-> efferent neuron
If a neurotransmitter bound to a receptor, and it was an inhibitory response, which type of channel would open on the plasma, membrane of the target cell
potassium
the parasympathetic post gamglionic neuron relates the neurotransmitter
acetylcholine
If a neurotransmitter bound to a receptor, and it was an excitatory response , which type of channel would open on the plasma, membrane of the target cell
sodium
the sympathetic post gamglionic neuron relates the neurotransmitter
norepinephrine
the autonomic system involves
the parasympathetic and sympathetic system
