nervous system Flashcards
chapter 11
type of stress response of nervous system
short term response
type of stress response of endocrine system
long term response
effect of nervous system response to stress as relevant to blood flow
blood diverted to needed muscles
speed of nervous system stress response
quick stress response
speed of endocrine system stress response
slow stress response
parts of body involved in CNS
brain and spinal cord
role of CNS
coordinate info coming in and out
role of PNS
carry info b/w organs in the body and the CNS
nerve groups of the PNS
somatic and autonomic nerves
nerves for voluntary responses
somatic nerves
nerves for involuntary responses
autonomic nerves
2 categories of autonomic nerves
sympathetic and parasympathetic
voluntary control involves these parts of the body (not of the nervous system)
skeletal muscle, bones, skin
types of somatic nerves
sensory and motor
role of sensory nerves
relay info about environment to CNS
role of motor nerves
carry out responses from CNS
role of sympathetic nerves
prep body for stress
role of parasympathetic nerves
return body to normal resting level after stress
reflex arc involves which nerves (last part of process)
motor nerves
structures controlled by autonomic nerves
internal organs
example of sympathetic nerve response as relevant to blood flow
blood diverted from secondary organs to more important ones
2 types of nerve cells
glial and neurons
how neurons communicate
conduct nerve impulses
structure of a nerve is
a bundle of many neurons
role of dendrites
receive info
role of dendrites on sensory neurons
receive info from outside world
role of dendrites on interneurons/motor neurons
receive info from other neurons
where do dendrites send their info
the cell body
role of the axon
transmit nerve impulses towards other structures
name of the axon fatty protein covering
myelin sheath
cells that make up the myelin sheath
schwann cells
what are schwann cells
special glial cells
role of myelin sheath
speed up transmission of action potentials
nodes of ranvier
gaps between myelin sheaths
axon coating present in PNS
neurilemma
neurilemma indicates what property
able to regenerate nerve tissue and damaged axons
matter that is not coated with neurilemma
grey matter
property of grey matter as relevant to being damaged
damage is typically permanent
neurons that move towards the CNS
afferent neurons
neurons that move away from the CNS
efferent neurons
term for clusters of sensory neurons
ganglia
role of interneurons
link neurons together
interneurons are commonly found here
brain and spinal cord
motor neurons are types of
efferent neurons
simplest nerve pathway
reflex arc
regions of the brain
fore-, mid-, hind- brain
part of the brain where olfactory lobes and bulbs present
the forebrain contains this (o)
part of the brain that contains the cerebrum
the forebrain contains this (c)
role of olfactory lobes
receive information relating to scent
role of cerebrum
coordination (sensory and motor integration)
cerebrum is involved in what type of movement
voluntary movement
name for the surface of the cerebrum
cerebral cortex
cerebrum is split into
left and right hemispheres
structure connecting the 2 cerebral hemispheres
corpus callosum
role of corpus callosum
allows for exchange of into b/w the 2 hemispheres
location of thalamus
in forebrain, under cerebrum
role of thalamus
coordinate and interpret all sensory info (except for smell) to appropriate part of the cerebrum
role of hypothalamus
maintain critical internal body functions
structures connecting nervous systems to endocrine systems
hypothalamus and pituitary gland
most developed part of the brain
forebrain
optic lobes present in which part of the brain
midbrain contains this structure
role of optic lobes
vision and ear reflexes
what does the hindbrain connect to
spinal cord
parts of the hindbrain
pons, medulla, cerebellum
what type of movement does the cerebellum deal with
voluntary movements
role of pons as a structure
connect cerebellum and medulla
role of pons
control of sleep
role of medulla oblongata in hindbrain
reflex centre - autonomic nerve control
natural painkiller examples
endorphins and enkephaline
how painkillers work
attach to pain receptor sites
artificial painkiller example
opiates
examples of opiates
heroin, codeine, morphine
how artificial painkillers work
prevent production of pain transmitters
effects of stopping opiate usage as relevant to pain receptors
receptor sites open and pain transmitter is produced in excess