Autonomic And Somatic Nervous System Flashcards
What part of the neuron is the transmiting part
Axon
Neurons communicate with each other through electrical events called
Action potentials
Difference between autonomic and somatic nerves
1.Autonomic is under involuntary control
Somatic is under voluntary control
- Postganglionic autonomic nerves are no myelinated
Motor nerves are myelinated
3.
How is the efferent somatic nervous system different from the autonomic ns
The single mylinated motor neuron originating in the cns travels directly to the skeletal system without the mediation of ganglia
Afferent nerves send sensation from
The body to cns
Divisions of the autonomic nervous system
Parasympathetic, sympathetic and enteric
The gastrointestinal tract, pancreas and gallbladder are innervated by
The enteric neurons
What organs are the sympathetic ns innervated by
Kidney, adrenal medulla, sweat glands, pilomotor muscles
Major difference btw parasympathetic and sympathetic ns
- In parasympathetic the neurotransmitter released from both the preganglionic and postganglionic neurons are acetylcholine
- In sympathetic the neurotransmitter released from the preganglionic neuron is acetylcholine but d one released from the postganglionic is noradrenaline
In the somatic system what receptors are found
Nicotinic receptors
In autonomic system what receptors are found( parasympathetic)
Muscarinic receptors
What receptors are found in the sympathetic
Adrenergic and muscarinic receptors
About alpha 1 receptors
They are found in postsynaptic membrane
. They constrict smooth muscles
. Increases peripheral resistance and blood pressure
. Causes mydraisis
. Contraction of the bladder internal sphincter
Location of the alpha 2 receptors
Presynaptic and beta cell of the pancreas
