The Autonomic Nervous System Flashcards
Is the autonomic NS voluntary or involuntary
Involuntary
Where do nerves of the sympathetic nervous system arise from
Thoracic and lumbar spinal cord
Where do parasympathetic nerves arise from
Cranium and sacral spinal cord
Where do the presynpatic and post synaptic nerves in the sympathetic NS go between
Presynaptic: spinal cord to sympathetic trunk
Postsynaptic: sympathetic trunk to organs
What is the sympathetic trunk
Bundle of nerve fibres next to the spinal cord
What is duel innervation
When an organ receives inebriation from both sympathetic and parasympthathetic axons - produce opposite effects
What neurotransmitter transmits impulses to muscles in the somatic nervous system
Acetylcholine (ACh)
What neruotransmitter gets releases in the peripheral nervous system
Acetylcholine (ACh)
What neurotransmitter gets released in the sympathetic nervous system
Norepinephrine
Epinephrine
Name the ACh receptor in the somatic NS
Nicotinic
What is the ACh receptor in the parasympathetic NS
Muscarinic
Which region of the brain controls the autonomic NS
Hypothalamus
Describe the pathway of an impulse in the sympathetic NS to the visceral organs
Originates in the thoracolumbar spinal cord,
Presynpatic neurons carry impulse through white matter
to ganglia in the sympathetic trunk
The impulse travels by postsynaptic neurons
Through grey matter
To organs
How does the spinal cord connect to sympathetic triune
Ramis communications (in white matter)
