psych1 Flashcards
flight/fight/freeze definition
a state of high arousal where the body rapidly prepares for a burst of vigorous activity in a threatening situation.
what are the pathways that sensory neurons travel along called?
afferent pathways
what are the pathways that motor neurons travel along called?
efferent
how does a spinal reflex happen?
the sensory message only reaches the spine before a message is sent back tot he muscles.
spinal reflex definition
an automatic response initiated by neurons in the spinal cord instead of the brain
what do interneurons do?
relay the message given from the brain to the motor neurons.
differences in unconscious vs conscious responses?
awareness, controllability, intentional/involuntary
what are neurotransmitters carried in?
vesicles
what are neurons communicating with each other called
presynaptic & postsynaptic neurons
what is an excitatory neurotransmitter
stimulate or activate postsynaptic neurons
what is an inhibitory neurotransmitter
block or prevent postsynaptic neuron from firing
how do neurons communicate electrochemically?
dendrites receive message, pass it onto cell body, electric message starts in axon, electric impulse travels to axon terminals
parasympathetic ns definition
brings the body back to homeostasis
sympathetic ns definition
readies the body for action
autonomic ns inputs & outputs
input - internal receptors<div>output - soft muscles & glands</div>
somatic ns inputs & outputs
inputs - sensory input<div>outputs - skeletal muscles</div>
peripheral ns definition
the rest of the neurons that connect the body to the CNS
what does the primary somatosensory cortex do?
receive information about what the body is touching & feeling
what does the primary motor cortex do?
control voluntary movements
what does the cerebellum do?
coordinate balance & complex muscle action
what does the brain stem do and what’s it connected to
controls unconscious activities & is connected to the spinal cord.
what does the cerebrum control?
memory, speech, thought & conscious actions.
what’s the meninges?
3 layers of connective tissues
what does the frontal lobe do?
expressing emotions,<div>memory formation</div><div>planning & selecting movements</div>