Study sets, textbooks, questions
Upgrade to remove ads
BIO Unit 2: CH 16
Terms in this set (44)
Just like the primary motor cortex responsible for somatic voluntary skeletal, the hypothalamus is responsible for...
Autonomic involuntary visceral/smooth responses
In somatic, we have 1 lower motor neuron going from ant horns to skeletal muscle but in autonomic we have...
2 motor neurons (1st upper motor & 2nd lower motor neuron)
but the lower motor neurons have a 1st & 2nd order neuron
After leaving the lateral horns, the lower 1st order motor neuron goes to the___ whereas the lower motor neurons go ___
ganglion somewhere in body then synapses w/ 2nd lower motor neuron which then goes to target structure
The autonomic system consists of...
1. Upper motor neurons originate in hypothalamus
2. 2 lower motor neurons
3. Sympathetic & parasympathetic
the 1st order motor neurons are also known as...
the preganglionic neurons
the 2nd order motor neurons are also known as...
the postganglionic neurons
For the preganglionic neurons, their somas are in the___ while there axon terminals are in the ___
lateral horns of spinal cord
ganglia somewhere in body
The sympathetic division is also known as...
the thoracolumbar division (bcos its spinal nerves (pregang fibers/neurons) emanate from the thoracic & lumbar region
The Spinal nerves (pregang fibers/neurons) emanate from which region?
thoracic & lumbar region
Some of the actual somas may be in the lateral horns of the cervical or sacral region but actual nerves (fibers/neurons) themselves will be coming out of intervertebral foramina themselves t/f?
The sympathetic has the stress response which is also known as the...
fight or flight response
The sympathetic response's fight or flight response affects which structures?
Anything but the digestive system (the digestive system is parasympathetic jurisdiction)
The pregang neurons/fibers are physically....
short (bcos their axon terminals that they need to get to (@ the ganglia where the 2nd order/postgang neurons) will be found nearby
The pregang neurons prod___, making their target synapses ___
When the pregang neurons synapse w/ postgang neurons, acetylcholine will cross synaptic cleft t/f?
The postgang neurons/fibers are physically...
long (makes sense since their target structures could be anywhere & they have a longer distance to travel)
The postgang neurons prod ___/___, making their target synpases
All ganglia have same function, location, their only difference is their what?
Epinephrine & norepinephrine
All ganglia have the same function & location, their only difference is their what?
What are the 3 types pf ganglia?
Sympathetic chain ganglia, collateral ganglia, & adrenal medulla
Traits of the sympathetic chain ganglia?
Parallel on either side of vertebral column
Notice some pregang neurons go thru chain ganglia all the way & others synapse @ chain ganglia w/ postgang neurons
What are the destinations of the sympathetic chain ganglia?
Head, upper body, lower body (basically everywhere tbh)
Traits of the collateral ganglia?
Not paired unlike previous ganglia
Postgang neurons that come out of these will go to/serve abdominal viscera
Located in post body wall
What are the collateral ganglia types?
Celiac ganglion - Near celiac trunk (major artery branch)
Sup mesenteric ganglion - Near sup mesenteric artery (near celiac trunk)
Inf mesenteric ganglion - Near inf mesenteric artery
Where is the Celiac ganglion located?
Near celiac trunk (major artery branch)
Where is the Sup mesenteric ganglion located?
Near sup mesenteric artery (near celiac trunk)
Where is the Inf mesenteric ganglion located?
Near inf mesenteric artery
The adrenal medulla is the exception to what rule?
Pregang neurons are short rule
The adrenal medulla is a modified ganglion, why?
Bcos there's only postgang cells here not postgang neurons (axons, nerves)
In the adrenal medulla what happens when the pregang cells come in?
Pregang cells come in & then postgang cells release epinephrine & norepinephrine directly in blood rather than innervating a target structure
When large amounts are released, fight/flight response occurs
When a large amount of epinephrine & norepinephrine are released what happens?
fight/flight response happens
Most but not all organs require both symp & parasymp divisions, t/f?
What is autonomic tone?
Similar to neural & muscle tone
Pick up the muscle slack & have to be ready to act
What are the two types of synapses?
The ganglionic synapses are...
Synapses that occur between pregang neurons & postgang neurons in ganglia themselves
The ganglionic synapses have what as their neurotransmitter & what is the result of the transmitter?
Acetlycholine (making them cholinergic)
The terminal synapses have what as their neurotransmitters & what is the result of the transmitter?
Epinephrine & norepinephrine
Both excitatory & inhibitory
The parasympathetic division is also known as the...
What is the function of the parasympathetic division?
Inhibits to bring levels down to normal, opposite of sympathetic division
One exception is that it excites digestive tract
Think rest & digest
In the parasympathetic, opposite to the sympathetic, the pregang fibers are physically ___ & the postgang fibers are___
(opposite of in sympathetic)
In the parasympathetic, the ganglia Is located where (unlike in the sympathetic)?
Ganglia located in or near target structures
Unlike ganglia of parasympathetic division where they were much closer to actual structure
In the parasympathetic division, both synapses (pre & post) are all cholinergic t/f?
In the parasympathetic division, both synapses (pre & post) are all cholinergic but what are its receptors (opposite to the sympathetic devision)?
***in sympathetic we had alpha & beta receptors here we have more specific ones
What are the diff between the sympathetic vs parasympathetic?
Diff in wiring
Coarse reg vs fine reg
One single pregang neuron can synapse w/ multiple postgang in multiple organs vs 1 single pregang can synapse w/ 1 single pregang neuron in 1 organ
Covers more area in certain period vs covers less area in certain period
Faster impact vs slower impact
Sensory input coming in from periphery on somatic side from internally are on visceral side, enter spinal cord, relay up to brain, reflexes go out as necessary, processing, motor responses come down, then going to target structures (skeletal on somatic side, smooth muscle on visceral/autonomic side)
Other sets by this creator
Quiz 12 (Phenol Red/Citrate/Phenylalanine)
BIO 204 Unit 1: Ch 2 & 5
BIO 204 Unit 1: Ch 1
BIO Unit 3: Ch 21
Other Quizlet sets
STRX 5.3 - Liver and Gallbladder
ch 38 mod 6
HEAL 230 Kollath-Cattano Final
BIO 211 Lab PRACTICAL 2