the neuron Flashcards
what comprises the nervous system
neurons or nerve cells
what are nerves
long bundles of neuronal axons
what do nerves do
transmit signals from CNS
what do these signals start as
graded electrical impulses generated at the dendrites of neurons
if impulse is strong enough what happens
impulse travels along axon and causes neurotransmitter to be secreted from axon terminals to synapse
in the synapse what happens to the neurotransmitters
neurotransmitter will bind to either a neuron or a muscle cell
what do neurons send and receive
signals in nervous system
which neuron is known as the afferent neuron
sensory neuron
what do sensory neurons do
send messages to cns about sensory information such as – pain, touch and smell
what neuron is known as efferent neuron
motor neuron
what do motor neurons do
sends messages to muscle
what can motor neurons be divided into
autonomic and somatic nervous system
is the autonomic nervous system involuntary or voluntary
involuntary
is the somatic nervous system involuntary or voluntary
voluntary
what muscle does the autonomic nervous system control
cardiac and smooth muscle
