nervous system

Cards (11)

what 2 systems does the nervous system split into?
central nervous system and peripheral nervous system
what is in the central nervous system?
the brain and spinal cord
whats in the peripheral nervous system?
somatic nervous system
autonomic nervous system - sympathetic and parasympathetic system
what is the brain?
centre of all conscious awareness
divided into 2 hemispheres
what is the spinal cord?
extension of the brain that is responsible for reflex actions
what is peripheral nervous system?
transmits messages via millions of neurons to and from the CNS
what is the somatic nervous system?
controls voluntary muscles and receives information from the sensory receptors
what is the autonomic nervous system?
controls involuntary muscles and control of vital organs such as heart rate and breathing rate
what are the 2 halves of ANS?
sympathetic and parasympathetic
how is adrenaline released?
hypothalamus receives the information which activates the ANS (sympathetic branch) which causes the adrenal medulla to release adrenaline
sympathetic arouses a person whereas parasympathetic relaxes a person