Study Set Content:
The heart is predominantly controlled by the parasympathetic system, except under stress when it is controlled by the
sympathetic system.
A collection of nuclei, cell bodies, nerves, ganglia and plexuses that provides afferent and efferent innervation to smooth muscle and visceral organs of the body.
AUTONOMIC NERVOUS SYSTEM
are branching network of our vessels or nerves they are axons outside the CNS.
Plexus
(the plexus of Auerbach)
Myenteric plexus
(the plexus of Meissner)
Submucous plexus
regulates functions that are not under conscious control such as BLOOD PRESSURE, HEART RATE, and INTESTINAL MOTILITY.
ANS
is a large and highly organized collection of neurons located in the walls of the gastrointestinal (GI) system
The enteric nervous system (ENS
It is sometimes considered a third division of the ANS
ENTERIC NERVOUS SYSTEM
It is found in the wall of the
GIT
It is found in the wall of the GIT from the (blank) to the (blank) and is involved in both motor and secretory activities of the gut. It is particularly critical in the motor activity of the colon
esophagus , distal colon
includes the myenteric plexus (the plexus of Auerbach) this is the part of the longitudinal and circular layers of the muscle and the submucous plexus (the plexus of Meissner).
ENS
These neuronal networks receive preganglionic fibers from the (blank) and postganglionic (blank) axons.
parasympathetic system and sympathetic
They also receive sensory input from within the wall of the
gut
Fibers from the neuronal cell bodies in these plexuses travel forward, backward, and in a circular direction to the smooth muscle of the gut to control (blank)in the mucosa.
motility and to secretory cells
transmit chemical and mechanical information from the mucosa and from stretch receptors to motor neurons in the plexuses and to postganglionic neurons in the sympathetic ganglia.
Sensory fibers
ENS Functions
semiautonomous
provides the necessary synchronization of impulses.
zing input from the motor outflow of the ANS for modulation of GIT activity and sending sensory information back to the CNS
o semiautonomous
provides the necessary synchronization of impulses... ex., ensures (blank), propulsion of gut contents and relaxation of sphincters when the gut wall contracts.
forward, not backward
are the gap or small pocket of space between two cells where they can pass messages to communicate
Synapse
The anatomy of autonomic synapses and junctions determines the localization of transmitter effects around
nerve endings
