1100 nervous system

whats the difference between central and peripheral nervous system

central: only brain and spinal cord

peripheral: all other nerves that branch out from cns

what are the main functional divisions of the peripheral nervous system

sensory and motor

whats the difference between these divisions

Sensory: has receptors and transmits the infor from receptors to cns

Motor: transmits information from cns to the rest of the body through effectors

what are the 2 functional divisions of the sensory nervous system and whats the difference between them?

Somatic: receives info from the skin, fascia, joints, skeletal muscles, special senses

Visceral:Receives info from the viscera

what are the 2 functional divisions of the motor nervous system and whats do they do

Somatic: controls voluntary muscles

Autonomic: controls involuntary muscles like the cardiac muscles

what are the 2 divisions of the autonomic motor system

sympathetic: fight or flight

parasympathetic: rest and digest

name the functions of the nervous system

sensory input, integration, motor output

neuroglia vs neurons

Neuroglia: cells that are the supportive scaffolding and protect the neurons. they do not send nerve impulses. Ex: scwhann cells

Neurons: transmit eletrical and chemical signals

what are schwann cells

They are cells that wrap around the nerve fiber (axon) and made of myelin

what is myelin

it is a protein and lipid material that the schwann cell is made of

what is a node of ranvier

it is the gaps in between the schwann cells where there is no myelin sheath to insulate the electrical impulses. This allows for saltatory conduction