MCAT Bio Question

[hope24]

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Can someone please explain prenganglionic and postganglionic neurons? Thank you so much 🙂

 

[Silverfalcon]

Can someone please explain prenganglionic and postganglionic neurons? Thank you so much 🙂

It's just "pre" vs "post." Nothing difficult..

 

[sc4s2cg]

What do you need explaining?

Pre is before the ganglia and the post is after the ganglia.

 

[hope24]

What do you need explaining?

Pre is before the ganglia and the post is after the ganglia.

What neurotransmitters are released for sympathetic and parasympathetic systems by the preganglionic and postganglionic neurons? is it just ACh for parasympathetic by preganglionic and epinephrine and norepinephrine for sympathetic by pre???

 

[ModernAlchemist]

What neurotransmitters are released for sympathetic and parasympathetic systems by the preganglionic and postganglionic neurons? is it just ACh for parasympathetic by preganglionic and epinephrine and norepinephrine for sympathetic by pre???

I have no idea what you're saying, but sympathetic and parasympathetic preganglionic neurons all use ACh. For postganglionic neurons of those systems, sympathetic uses epinephrine and parasympathetic uses ACh. Is that all that you were asking?

 

[apumic]

What neurotransmitters are released for sympathetic and parasympathetic systems by the preganglionic and postganglionic neurons? is it just ACh for parasympathetic by preganglionic and epinephrine and norepinephrine for sympathetic by pre???

There are exceptions (and receptor subtypes), but generally the receptors are:

Sympathetic:
Pre: nACh
Post: NE

Parasympathetic:
Pre: nACh
Post: mACh

 

[hope24]

There are exceptions (and receptor subtypes), but generally the receptors are:

Sympathetic:
Pre: nACh
Post: NE

Parasympathetic:
Pre: nACh
Post: mACh

Thank you so much! 🙂