cellular basis of nervous system
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main point of reticular theory?
NS is a network of interconnected cells -> info transmitted in continuous flow
main point of neuron doctrine?
NS made of discrete individual cells -> electrical pulses pass thru individual cells
who found reticular theory?
Golgi
who found neuron doctrine?
Cajal
what is a basic unit of nervous system?
Neuron
main structures of neuron
-cell body (soma) -dendrite -axon -axon hillock -presynaptic nerve terminal
which structure of the neuron where signal come in and integrated (occur more in dendrite)?
cell body (soma)
which structure of the neuron has branch-like extensions of a neuron that receive signals from other neurons and transmit them toward the cell body?
dendrite
which structure of the neuron receives both excitatory (spines) and inhibitory (shaft) input?
dendrite
which structure of the neuron that carries electrical signals away (and toward) the soma?
axon
which structure of the neuron that can be mylinated?
axon
which structure of the neuron that trigger zone of action potential?
axon hillock
which structure of the neuron release chemical signal to next cell?
presynaptic nerve terminal
where does the point where cells contact with each other?
synapse
shapes of neurons
• unipolar • bipolar • pseudounipolar • multipolar