BIOL 223 Chapter 16-3
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Where will the sympathetic preganglionic fibers originate?
The short preganglionic neurons are sometimes called the:
Are sympathetic preganglionic fibers long or short?
List the three major classes of sympathetic ganglia.
- sympathetic chain ganglia
- collateral ganglia
- adrenal medulla
How many of each type are found in the sympathetic chain?
- cervical - 3
- thoracic - 10-12
- lumbar - 4-5
- sacral - 4-5
- coccygeal - 1
What areas of the body will the sympathetic chain innervate?
the thoracic cavity
List the effects that the sympathetic nervous system will have on the thoracic cavity.
- increased HR
- increased BP
- increased respiration
- increased sweating from cutaneous glands
List the three types of collateral ganglia.
- celiac ganglia
- superior mesenteric
- inferior mesenteric
The stomach, gallbladder, liver, pancreas, and spleen are innvervated via which collateral ganglia?
The small intesting and proximal 2/3 of the large intestine are innervated via which collateral ganglia?
superior mesenteric ganglia
The kidneys, bladder, reproductive organs, and lower 1/3 of the large intestine are innervated via which collateral ganglia?
inferior mesenteric ganglia
How does the neurotransmitter release within the adrenal medulla differ from in the collateral and sympathetic chain ganglia?
neurotransmitter enters the blood for a much more widespread effect
Will sympathetic postganglionic fibers be long or short?
Several preganglionic fibers bundled together form a:
What kind of effect will the information travelling rhrough collateral ganglia have on the abdominal and pelvic cavities, excitatory or inhibitory?
What is the function of an alpha 1 receptor?
increase the release of Ca from the SR, increasing smooth muscle contraction
What is the function of an alpha 2 receptor?
lowers cAMP levels, inhibitory effect
What is the function of a beta 1 receptor?
increase HR, BP, metabolism, and lipolysis
What is the function of a beta 2 receptor?
cause smooth muscle to relax
What is the function of a beta 3 receptor?
cause an increase in fat breakdown
What type of receptor is on the sympathetic postganglionic neuron?
What type of neurotransmitter will sympathetic postganglionic neurons release?
What type(s) of receptors are on the target tissue within the sympathetic division?
alpha and beta receptors
What two parts of the body are dilated under effect of the sympathetic division?
- respiratory passages
What three things are decreased under the effect of the sympathetic division?
- rate of digestion
- urinary activity
- blood flow to reproductive organs
What five things are increased under the effect of the sympathetic division?
- HR and BP
- rate of respiration
- mental alertness
True or False: Most organs of the body are innervated by both parasympathetic and sympathetic systems.
In a dually innervated organ, whatever the parasympathetic division does, the sympathetic should do the:
What would you like to do?
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