the nervous system Flashcards
What 2 systems is the human nervous system divided into?
Central nervous system (CNS)
Peripheral nervous system (PNS)
What does the CNS comprise of?
Brain
Spinal cord
What does the PNS comprise of?
Somatic nervous system
autonomic nervous system
what is the role of the somatic nervous system
Receives information from sensory receptors and controls voluntary actions such as muscle movement.
what is the role of the autonomic nervous system
Controls bodily functions e.g. breathing, heart rate, sexual arousal, stress.
what are the 2 divisions of the autonomic nervous system
sympathetic nervous system
parasympathetic nervous system
what is the role of the sympathetic nervous system
Controls the body’s response to perceived threats.
“Fight or Flight“
This responds to times of stress
what is the role of the parasympathetic nervous system
Regulates body functions while at rest.
“Rest and Digest“ or “Feed and Breed“
This is your normal state.
Name the outer layer of the brain
cerebral cortex
Which organ coordinates reflex actions?
spinal cord
What is the peripheral nervous system made up of?
millions of nerve cells
