Skeletal Muscle & Nerves Overview Flashcards
structure of a nerve
whole nerve -> fascicles -> cells (neurone) -> axons
neurons & communication
neurone are the communication wires within our body
they transmit signals between different parts of our body
neurons use signals in the form of bio electricity and neurotransmitters to communicate
structure of a neuron
dendrites
cell body
axon
synaptic terminals
name of bioelectrical signals
action potentials
action potentials travel along the axon from ___ to ___
the cell body to synaptic terminals
input zone function
dendrites, take in information
cell body function
process information
axon function
transport signals to where they need to be
synaptic terminals function
sends out signals
bio electricity function
the bioelectricity generated in a neuron passes its bio electricity onto other neurons or muscles to communicate
waves of bio electricity sent down axons
what is an action potential/what does it do?
the propagation of a change in voltage (movement of ions) across the cell membrane down an axon
depolarisation = cell becomes more positive
depolarisation = cell returns to resting voltage
3 main subtypes of muscle
cardiac
smooth
skeletal
where, what, control of cardiac muscle
where = heart what = rhythmic & coordinated contractions for pumping blood around body control = autonomic nervous system (involuntary)
where, what, control of smooth muscle
where = gastrointestinal what = rhythmic & coordinated contractions for pumping blood around body control = autonomic nervous system (involuntary)
where, what, control of skeletal muscle
where = core & limb muscles what = movement of skeleton posture (thermoregulation) control = somatic nervous system (voluntary)
