Autonomic Nervous System Week 4 Flashcards
(49 cards)
The two branches of the autonomic nervous system:
Sympathetic and Parasympatheic
The ANS is also referred to as?
Involuntary nervous system or General visceral motor system
Two structural components of the ANS:
Visceral afferent neurons and visceral efferent neurons
What is the function of the ANS
operates without conscious control
What can the ANS be overridden by?
Medulla and the hypothalamus
ANS is dependent on what?
Reflex Arc
Three major components of Autonomic pathways:
- Preganglionic Neuron
- Ganglion
- Postganglionic neuron
ANS:
- Cell body in CNS
- Lightly Myelinated
- Synapses at ganglion
- excitatory response
Preganglionic Neuron
Where the synapse occur and cell body of post ganglion neuron
Ganglion
ANS:
- Cell body within the PNS in the ganglion
- Unmyelinated axon
- synapses at effector organ
Postganglionic neuron
Neurotransmitter effects: ACh only
Preganglionic Neuron
Neurotransmitter effects: ACh or norepinephrine
Postganglionic Neuron
- Cell body in CNS
- Single, myelinated axon
- Synapses on skeletal muscle
Somatic NS
Neurotransmitter effects: All ACh and alwayd excitatory
Somatic NS
Constrict pupils
Parasympathetic -rest
Stimulate saliva
Parasympathetic-rest
slow heartbeat
Parasympathetic -rest
constrict airways
Parasympathetic-rest
stimulate activity of stomach
Parasympathetic-rest
inhibit release of glucose; stimulate gallbladder
Parasympathetic-rest
Stimulate activities of intestines
Parasympathetic-rest
Contract Bladder
Parasympathetic-rest
promote erection of genitals
Parasympathetic-rest
Dilate pupils
Sympathetic-flght
