Visceral Nervous System Flashcards
Where do the peripheral processes of sympathetics of visceral afferents synapse through
White rammus communicans
What are the peripheral processes of parasympathetics of visceral afferents carried through
Sacral spinal nerves and cranial nerves
Visceral afferents are associated with what kind of receptors
Pressure, chemical concentrations, m. stretching
What nerves carry preganglionic parasympathetics
CN. III, VII, IX, X and Sacral spinal nerves 2, 3, 4
What kind of release do parasympathetics have
Cholinergic
What effect do parasympathetics have on CO, bronchial tree, pupils, and peristalsis
Dec. CO, constrict, and stim. peristalsis
What effect do parasympathetic impulses have on the pathway to the lungs
Constrict bronchial tree and inc. secretion of bronchial glands
In the upper 1/3 of the esophagus, what are the skeletal m. fibers supplied by
Recurrent laryngeal n.
The pregang. fibers reach the stomach via ant. (about 4) and post (about 6) vagal trunks and synapse where
submucosal (Meissner’s) and myenteric (Auerbach’s) plexuses
What does parasympathetic stim. result in in the stomach
Contractoin of smooth m. and secretion of gastric juices
Pathways to the SI, cecum, vermiform appendix, ascending and transverse colon travel through what
Through celiac plexus, then continues through the superior mesenteric plexus
What does parasympathetic stim. do to smooth m. of the digestive system and intestinal glands
Contraction of smooth m. and secretomotor for intestinal glands
What kind of special receptors are found in the vermiform appendix
Nociceptors
How do pregang fibers reach the gall bladder, pancreas, and biliary tree
Via the hepatic branch of the right vagal trunk by way of the hepatic plexus, an extension of the celiac plexus
How do parasympathetics reach the spleen
from post vagal trunk by way of splenic plexus, and extension of the celiac plexus
How do fibers reach the kidneys
Renal plexus from post. vagus
What is special about the motor supply to the kidneys
Strictly sympathetic, any arriving via parasymp pathways are likely visceral afferents
How are the kidneys and liver similar in their n. supply
Their parasympathetic supply is likely primarily afferent
What other organ has their parasympathetic supply similar to the kidneys and liver
Suprarenal glands
Where do the sacral parasympathetic pathways arise from
Lateral horns of S2-S4
Sacral parasympathetics are carried inf. in the cauda equina, exit the ant. sacral foramina, and then are carried in what
Pelvic splanchnic n.
What plexus do the pelvic splanchnic nerves travel to
Inferior hypogastric (pelvic) plexus
