Human Anatomy- Autonomic Nervous System

Somatic

Processes that are consciously precieved

Sensory

Sight, smell, hearing, touch, and taste

Motor

Skeletal

Autonomic nerves system (ANS)

Processes below conscious level

What does the Autonomic nervous system (ANS) often respond to

Visceral sensory input (reflexively)

Main function of the ANS

Maintain homeostasis

ANS uses

2-neuron chain from CNS to effector

Myelinated axons (Preganglionic neuron)

From CNS to ganglion

Unmylienated axon (postganglionic neuron)

From ganglion to effector

Postganglianic neurons use either

ACH or Norapinephrine

ACH or Norapinephrine can either

Stimulate or inhibit the effector

Parapympathetic division

Homeostatis at rest

Parapympathetic division conserves

Energy and replenishes nutrion stores “rest and digest”

Where is the response of a parasympathetic division

Local tissue

In parasympathic division, what shapes do gangions take

Preganglionic neuron is long, post ganglionic neuron is short, ganglion is close or at effector

Sympathetic division

Homeostasis during emergency, exercise, and stress, “fight or flight”

Where is the sympathetic division activated

System wide, mass activation

Sympatetic division has increased

Activation or tissues and nutrient consumption

What shapes do sympathetic ganglia take

Preganglionic nuron is short, post gnagionic is long, gangia is in sympathetic trunk

Pregang neuron cell bodies

Levels T1-L2