4.1 - The Nervous System Flashcards
(18 cards)
two branches of the nervous system
4.1
- central nervous system
- peripheral nervous system
4.1
two branches of the central nervous system
4.1
- brain
- spinal chord
4.1
three branches of the brain
4.1
- forebrain
- midbrain
- hindbrain
4.1
two branches of the peripheral nervous system
4.1
- somatic nervous system
- autonomic nervous system
4.1
two branches of the somatic nervous system
4.1
- sensory nerves
- motor nerves
4.1
two branches of the autonomic nervous system
4.1
- sympathetic nervous system
- parasympathetic nervous system
4.1
define:
central nervous system (CNS)
4.1
a system composed of the brain and the spinal chord which controls the body by processing and responding to sensory input from the peripheral nervous system
key:
* brain and spinal cord
* controls body by processing and responding to sensory input (from PNS)
4.1
define:
peripheral nervous system (PNS)
4.1
a system composed of all the nerves and gangila outside the brain and spinal cord that communicate information to and from the central nervous system
KEY
* nerves and gangila outside of brain and spinal cord
* communicates info to and from CNS
4.1
define:
somatic nervous system
4.1
transmits sensory information to the CNS and carries motor commands from CNS to the skeletal muscles
4.1
define:
autonomic nervous system
4.1
responsible for communications between the body’s non-skeletal muscles and the internal organs and glands that carry out bodily functions
4.1
define:
sympathetic nervous system
4.1
branch of the autonomic nervous system that activates the fight-flight-freeze response
4.1
define:
parasympathetic nervous system
4.1
branch of the autonomic nervous system that is responsible for maintaining day-to-day functioning of the body, such as digestions, heart rate, breathing and some glandular functions
4.1
define:
brainstem
4.1
part of the brain that connects the brain to the spinal chords
* CNS
4.1
define:
attention
4.1
narrowing the focus of awareness to a stimulus of interest
* ANS
4.1
explain:
link between parasympathetic and sympathetic nervous system
4.1
sympathetic nervous system sends signals to put the body on alert, and the parasympathetic nervous system calms those signals
* keep body balances
4.1
define:
fight-flight-freeze response
4.1
a physiological response to stress that causes an organism to react in a combative manner (fight), by removing themselves from the situation (slight), or by not reacting at all (freeze)
4.1
define:
homeostasis
4.1
the body’s natural state of rest and balance
4.1
