nervous system Flashcards
what is the nervous system made of ?
peripheral and cns
what is the cns made of?
brain and spinal cord
what is the peripheral nervous system made of?
autonomic and somatic nervous system
what is the autonomic nervous system made of?
sympathetic and parasympathetic nervous system
explain the function of the brain
-centre of awareness
-maintains life by regulating body temp etc
breifley expain the structure of the brain
-two hemispheres
-has cerebal cortex (outermost layer) which is more developed in humans
explain the strucutre of the spinal cord
it is an extension of the brain
explain the function of the spinal cord
-it allows signals to travel to and from the brain to be transmittted to the rest of the body via the pns
-responsible for reflexes
what is the function of the somatic nervous system?
it recieves information from the 5 senses and transmits it to the cns
-cns can also transmit info to direct muscle movement
what is an example of when somatic nervous system is useed?
when someone touches a hot pan and this infromation from sesnses is received from somatic and from the cns muscles are directed to move.
what is the function of the autonomic nervous sytem?
for vital functions like heart rate, breathing sexual arousal etc
explain sympathetic and parasympathetic nervous system briefly
-associated with fight or flight response
what is the definiton of periphera nervosu system
explain the sympathetic nervous system
-prepares body for phsycial activity eg. to run away
-used when body is in alert state
give examples of what happens to organs once they are in the alert state?
-increased breathing capacity
-blood pressure increase
-pupils dilate
what is the parasympathetic nervous system knows as?
rest or digest system
what does the parasympathetic nervous system do?
-allows bodys energy levels to be conserved and saved for later use
-regulates bodily functions eg digestion/urination#
-slows down breathing rate, heart rate etc
-body is in stae of rexaltion
what does it mean if someone is in a parasympathetic state for long
they will be more healthier
