pt 2 Flashcards
(18 cards)
2 main parts of the nervous system
central nerous sytem and peripheral nervous system
central nervous system
brain and spinal cord
peripheral nervous system
somatic nervous system, autonomic nervous system
somatic nervous system
brain and spinal cord send signals to the muscles, joints, and skin.Skin, muscles, and joints send signals to the spinal cord and brain.
neurons
cells that receive integrate, and transmit information in the nervous system
How do neurons operate
through electrical impulses and connect with other neurons through chemical signals
How do neurons communicate
selectively with other neurons and form neural networks
dendrites
Branchlike extensions of the neuron with receptors
that detect information from other neurons
cell body
The part of the neuron where information from
thousands of other neurons is collected and integrated.
axon
he long, narrow outgrowth of a neuron that enables it to
transmit information to other neurons
terminal buttons
Parts of the neuron at the end of the axon(s)
that release chemical signals from the neuron into the synapse
synapses
The site of communication between neurons through
neurotransmitters
action potential
firing of a neuron
how do neurons communicate
neurotransmitters
the two major ways in which neurotransmitters are removed from the synapse
reuptake and enzyme degradtion
reuptake
involves reabsorbing neurotransmitters
into the presynaptic neuron
postsynaptic neurons can produce signals of what two types
excitatory and inhibitory
inhibitory signals
decrease the likelihood that the neuron will fire an
action potential.
