PNS-ANS

Autonomic Nervous System

Parasympathetic Nervous System

Function:

• Controls release of Salivary Amylase (AMS) secretion at the mouth

Characteristics:

• Not normal mass discharge of system
• Midbrain, hindbrain, sacral portions of spinal cord
• Ganglia are near effector organs
• Post ganglionic neurons are limited to head and viscera
• Little divergene - 1 pregang activates few postgang

- "rest, reproduce, digest" maintaining bodily functions at basal levels control of individual organs
-Prevetebral ganglia INC blood flow to organs of digestion, reproduction and excretion INC Vascular DILATION DEC heart rate Vagus nerve is responisble for many parasynpathetic effects Pregangionic PRI - ACh Postganglionic SEC - ACh

Structure:

Concept: