Exam #3: Matching Flashcards
The distance between two Z discs
sarcomere
Otherwise known as thick filaments
myosin filaments
Contains only the actin filament and Z discs
I band
Both actin and myosin are found on this band
A band
Tropomyosin runs along it grooves
Actin filaments
Titin anchors to this in the middle of sarcomere
M-proteins
Anchoring proteins
Nebulin
Neurotransmitters are released at the
Axonal terminal
The “white” tissue of a neuron is:
Schwann Cell
Conducts impulses toward the nerve cell body
Dendrites
Conducts impulses away from the nerve cell body:
Axon
Propagation of salutatory conduction involves:
Nodes of Ranvier
Has important role in action potential activation
Axon Hillock
Has important role in action potential activation
Axon Hillock
Period during which the neuron cannot respond to a second stimulus, no matter how strong
Absolute refractory period
Numerous nerve impulses arriving at a synapse at closely timed intervals exert a cumulative effect
Temporal summation
The interior of the cell becomes less negative due to an influx of sodium ions
depolarization
Stimulation of a postsynaptic neuron by many terminals at the same time
Spatial summation
The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability
repolarization
An insufficient stimulus
Subthreshold stimulus
Called a nerve impulse when transmitted
Action potential
Any stimulus below this intensity will result in no response in a neuron
Threshold stimulus
