What is PNMT? What does it do? Where is it primarily located?
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Phenylethanolamine N-methyltransferase (PNMT) is an enzyme found
primarily in the adrenal medulla that converts norepinephrine
(noradrenaline) to epinephrine (adrenaline).
What are catecholamines?
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Dopamine ; Norepinephrine (~25% of what chromaffin cells secrete) ;
Epinephrine (~75% of what chromaffin cells secrete).
, What receptors do the cell bodies of the postganglionic PNS and SNS have?
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Receptors
Post-ganglionic PNS: cholinergic receptors.
Post-ganglionic SNS: adrenergic receptors.
What is the fight-or-flight division of the ANS? Why is it referred to as this?
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Sympathetic nervous system (SNS). This response is referred as fight-or-
flight because the body will prepare you to respond during fight-or-flight
situations. For example, fleeing from a bear chasing you in the woods.
Why are the adrenal medullae considered modified sympathetic ganglia?
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because they are under control of pre-ganglionic sympathetic neurons. The
cells in the adrenal medulla (chromaffin cells) are modified post-ganglionic
sympathetic neurons and secrete catecholamines into the blood stream
instead of neurotransmitters into a synaptic cleft.
Where are the autonomic motor nuclei specifically located within the gray matter of
the spinal cord?
Give this one a try later!
Phenylethanolamine N-methyltransferase (PNMT) is an enzyme found
primarily in the adrenal medulla that converts norepinephrine
(noradrenaline) to epinephrine (adrenaline).
What are catecholamines?
Give this one a try later!
Dopamine ; Norepinephrine (~25% of what chromaffin cells secrete) ;
Epinephrine (~75% of what chromaffin cells secrete).
, What receptors do the cell bodies of the postganglionic PNS and SNS have?
Give this one a try later!
Receptors
Post-ganglionic PNS: cholinergic receptors.
Post-ganglionic SNS: adrenergic receptors.
What is the fight-or-flight division of the ANS? Why is it referred to as this?
Give this one a try later!
Sympathetic nervous system (SNS). This response is referred as fight-or-
flight because the body will prepare you to respond during fight-or-flight
situations. For example, fleeing from a bear chasing you in the woods.
Why are the adrenal medullae considered modified sympathetic ganglia?
Give this one a try later!
because they are under control of pre-ganglionic sympathetic neurons. The
cells in the adrenal medulla (chromaffin cells) are modified post-ganglionic
sympathetic neurons and secrete catecholamines into the blood stream
instead of neurotransmitters into a synaptic cleft.
Where are the autonomic motor nuclei specifically located within the gray matter of
the spinal cord?
