Chapter 3A Quiz Flashcards
function of dendrites
receive information
longest part of dendrite
axon
part of neuron that transmits messages
axon
sensory neurons
carry incoming information from the sensory receptors to the CNS
motor neurons
carry outgoing information from the CNS to the muscles and glands
interneurons
communicate internally and intervene between sensory inputs and motor outputs
what causes an action potential
absolute treshold
thresholds
the level of stimulation required to trigger a neural impulse
all or none response
once action potential is released, the axon either fires or it doesn’t
the junctions between neurons
synapse
can cause muscular paralysis
acetylcholine (ACh)
lack of serotonin causes
depression
lack of dopamine causes
Parkinsons’ disease
psychoactive drugs interfere with neural transmissions
at synapses
antagonists
bind to its receptor and mimic its effects
nervous system
the body’s speedy electrochemical communication network, consisting nerve cells of the periphral and central nervous systems
peripheral nervous system
sensory & motor neurons that connect the CNS to the rest of the body