9-3 Autonomic Nervous System Flashcards
Which nervous system:
-controls skeletal muscle
-conscious, voluntary control
motor pathway: one neuron from CNS to effector
somatic nervous system
The somatic nervous system release which neurotransmitter?
acetylcholine (Ach)
The axon of a single somatic motor neuron extends from ___ all the way to the?
- CNS
- Skeletal muscle fibers
Somatic sensory pathways:
how many neurons in each pathway?
3
Somatic sensory pathways:
Cell body #1
dorsal root ganglion
Somatic sensory pathways:
Cell body #2
spinal cord or brain stem
Somatic sensory pathways:
Cell body #3
thalamus
What is the primary somatosensory area of the cerebral cortex?
postcentral gyrus
What is the anterior spinothalamic tract used for?
- light touch sensation
- deep pressure sensation
The lateral spinothalamic tract used for?
- pain sensation
- temperature (hot vs cold)
Somatic sensory pathways:
signals come from?
- upper motor neurons
- basal ganglia
- cerebellum
- sensory neurons or interneurons via reflexes
Where does the upper motor neuron originate from?
the primary motor cortex (precentral gyrus)
Lower motor neurons exits ______ to the muscle for movement
spinal ventral root
Which nervous system:
- regulated by the hypothalamus and brainstem
- controls viscera
- unconscious, involuntary
autonomic nervous system
Autonomic nervous system:
motor pathway, series of ____ neurons from the CNS to the?
- 2
- effector
What are the two divisions of the autonomic nervous system?
- sympathetic
- parasympathetic
What neurotransmitters are released by the autonomic nervous system?
- acetylcholine
- norepinephrine
Which division of the ANS is this:
- Heart rate= stimulates
- digestive organs=inhibit
- fight or flight
sympathetic
Which division of the ANS is this:
- Heart rate= inhibits
- digestive organs=stimulate
- rest and digest
parasympathetic
The autonomic motor pathway includes how many motor neurons?
-specifically which ones?
- 2
- pre ganglionic
- post ganglionic
ANS:
- pre ganglionic neuron from _____ to neuron in autonomic ganglion
- post ganglionic neuron from cell body in ganglion to?
- CNS
- effector
Sympathetic pre ganglionic neurons have cell bodies located in lateral gray mater of which spinal cord segments?
-T1-T12 +L1-L12
The sympathetic pre ganglionic neurons release what neurotransmitters?
epinephrine and norepinephrine
Where are the sympathetic post-ganglionic neuron cell bodies located?
-located in the “S” trunk ganglia
Cell bodies located in “prevertebral ganglia” follow along which arteries?
how many and which location
-3 large abdominal arteries
What are the names of the the prevertebral ganglia that follow 3 large arteries?
- celiac
- superior mesenteric ganglia
- inferior mesenteric ganglia
What do the celiac, superior mesenteric ganglia, and inferior mesenteric ganglia supply?
abdominal viscera
- stomach
- intestine
- kidneys
- liver
- spleen
Vagus nerves (CN X) carry _____ of all parasympathetic nerve impulses
80%
Parasympathetic nerves cause what type of effects?
-precise, localized
Unlike sympathetic nerves, parasympathetic nerves do not reach some viscera, what are examples of these?
- sweat glands
- arrector pili muscles
- kidneys
- spleen
- adrenal medullae
- wall of most blood vessels
Which division of the ANS is this:
- increase HR, contraction, BP
- dilate pupils, airways
- dilate vessels to skeletal muscles, heart, liver, and adipose tissue
- constrict blood vessels to nonessential organs
- mobilize glucose and fats
sympathetic
Which division of the ANS is this:
- salivation
- lacrimation
- urination
- digestion
- defecation
- decrease HR, airway diameter, pupil diameter
parasympathetic
