Nervous System Flashcards
The complex communication Network in which signals are constantly being received, integrated and transmitted
The nervous system
What is the glia
Provide structural support and insulation for neurons
Individual cells that receive, intergrate, and transmit information
The neuron
What is an afferent neuron
A sensory neuron
What is the efferent neuron
The motor neuron
What is the basic link that permit communication within the nervous
The neuron
What are the neuron features
The Soma, dendrite, axon, myelin sheath, the node of ranvier, terminal buttons, synapse
When positively and negatively charged ions differentially flow across the cell membrane and it leaves the neuron
Polarized
What does it mean when a neuron has resting potential
It is stable, has a negative charge, and it is an active
The excitatory signal does what
Depolarize is the cell membrane
The inhibitory signal
Hyperpolarizes the cell membrane
What happens if an excitatory stimulation reaches a certain level (threshold)
An action potential is generated
Once an action potential occurs blank
The neuron repolarizes
The minimum length of time after an action potential during which another action potential cannot begin is
The absolute refractory.
Why is action potential an all-or-none proposition
Weaker stimulus does not produce a weaker neural impulse rather a greater the strength of the faster the rate
