Chap 14 Flashcards
Sympathetic division
fight or flight
-increase metabolism
Parasympathetic division
Rest and Digest
- decreases metabolic rate
- increases blood flow
ANS stimulated by
interceptors
Organization of ANS
motor neurons originate in CNS w/ visceral motor neurons located in Autonomic ganglia outside CNS
Visceral Motor Neuron
in hypothalamus, synapse with
Preganglionic neuron
location of cell bodies, synapse with
Ganglion neuron
which synapse on visceral effectors
Where are Preganglionic cell bodies in the sympathetic NS
btwn T1 and L2
Sympathetic division Is called the
thoracolumbar division
3 locations of ganglionic cell bodies
- Sympathetic chain ganglia
- collateral ganglia
- Adrenal medulla
Sympathetic chain ganglia
chain of ganglia running along each side of vertebral column
Collateral ganglia
- outside sympathetic chain
- splanchnic nerve innervates 3 collateral ganglia
Adrenal Medulla
=suprarenal medullae
Nature of ganglionic fibres
short axons, release neurotransmitters into a capillary that act as hormones to affect target cells throughout body
Main neurotransmitter released by Postganglionic Fibres
NE- norepinephrine
Adrenal medulla cells are said to be ____ because the can release NTs that act as hormones
neuroendocrine
Cells can only respond to a chemical messenger if they have _____ for that messenger in the cell membrane or inside the cell
Receptors
Effect of NE and E binding to receptors on target: stimulate __ ______ within cell
2nd messengers
Location of Preganglionic cell bodies in parasympathetic division
brain stem and sacral segments of the spinal cord
Parasympathetic Division is called the
craniosacral division
location of ganglionic cell bodies
- Terminal ganglia: near Target organ
- Intramural: Internal
ANS consists of a 2 neuron pathway connected by ganglion, the pathways are
preganglionic and postganglionic
All preganglionic neurons arise from the CNS and use _____ as a NT; postganglionic cells of the sympathetic division use _____and postganglionic cells in the parasympathetic division use ______
acetylcholine, NE, acetylcholine
