Nervous System Flashcards
Grades potential
Small changes in plasma membrane permeability to ions
Reflex
An autonomic involuntary response to stimulus
Reflex arc
Neural pathway for reflex
Receptor potential
A graded potential in sensory receptors can stimulate pressure
Graded potential
At cell body and dendrites cancellation and summation of inhibitory and excitatory potential
Action potential
Temporary and all or nothing change in resting membrane potential can propagate down axon
Synaptic transmission
Neuron to neuron communication
Action potential is initiated
By sodium influx from graded potential traveling to axon hillock‘s once threshold is met the sodium influx causes Action potential
happens in neuron axons
Graded ion channels
Determine if graded potential is either ISPS OR ESPS
AP propagation
Nerve signal where resting potential gets depolarize and repolarize
Action potential
Rapid sequence and change of voltage across membrane
Myelinated axons
Action potential or propagated at notes of ranvier
Action potential occurs when sodium enters axons in diffuses downstream the nodes then stimulates sodium voltage gated channels
Faster saltatory conduction
Unmyelinated axons
Action potential occurs along axon it needs to depolarized and repolarize each time which makes for a slower propagation
Calcium effects on synaptic transmission
Stimulates fusion and exocytosis of neurotransmitters
