NERVOUS SYSTEM (everything)

central nervous system structure and function

• brain within cranial cavity

• spinal cord within vertebral column

Function

• interpret sensory input and dictate motor responses

Peripheral nervous system location and function

• cranial and spinal nerves

Function

• communication lines between CNS and rest of body

Sensation

receiving info. about the environment (can be internal)

• register changes from homeostasis or particular events (stimuli) 

Response 

response based on stimuli 

• can be voluntary or involuntary 

integration

the processing of sensory info

• stimuli is compared with other stimuli or memory

Somatic Nervous system

responsible for conscious perception and voluntary motor responses

• motor output is contraction of skeletal muscles

Autonomic Nervous System 

responsible for involuntary control of the body 

• sensory input can be from internal or external environment 

• motor output is contraction of cardiac, smooth muscle and glands 

• maintains homeostasis

enteric nervous system

• controls smooth muscle glands of digestive system

• located almost entirely in PNS

thermorecepters

respond to temp. stimulus

photoreceptors

respond to light stimulus

chemoreceptors

pay attention to chemicals

mechanoreceptors

respond to touch, pressure and vibration

nociceptors

fire only to indicate pain

collection of neuron cell bodies in CNS

nucleus

collection of neuron cell bodies in PNS

ganglion

bundle of axons in CNS

tract

bundle of axons in PNS

nerve

cerebellum location and role

• back of the brain

• movement, balance, and general motor control

brain stem location and role 

• base of brain 

• connects brain to spinal cord 

• responsible for regulatory processes like breathing, blood pressure, and eating