The nervous system

The nervous system:

a specialised n... of cells - (primary internal c... system) - communicates via e... + c... signals

Collects, processes + responds to info from e...

Coordinates different c../o... in body

network, communication, electrical, chemical, environment, cells, organs

The nervous system is divided into:

c... + p... nervous systems

central, peripheral

CNS: b... + s... c...

Brain receives i... + sends message

Spinal chord - r... actions

bran, spinal chord, info, reflex

Spinal chord: relays info from brain to body

Circuit of nerve cells allow r... actions (unconscious)

If spinal nerves damaged - cut off from brain + stop functioning

reflex

Peripheral nervous system is divided into:

s... + a... nervous systems

somatic, autonomic

Somatic nervous system: control v... m... under c... thought

voluntary movement, conscious

Autonomic nervous system: control vital o... + p... processes that happen automatically (u...)

Autonomic nervous system is divided into:

s... + p... nervous systems

organs, physiological, unconscious, sympathetic, parasympathetic

Sympathetic: f... o... f...

(dilates pupils, increases heart rate, inhibits saliva)

fight or flight

Parasympathetic: r... a... d...

(constricts pupils, slows heart rate, stimulates saliva)

rest and digest