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Questions tagged [autonomic-nervous-system]

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When we laugh or run for sport which autonomic system works?

When we laugh or run for sport which autonomic system takes place in this time? While I am not sure what happens in heart while laughing (tachycardia or bradycardia), but for sport running I'm sure ...
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Voluntary actions of Autonomic Nervous System

Somatic motor activity is always voluntary, while ANS motor activity is usually involuntary. pgno:762 This indicates the possibility of voluntary activity by ANS. So, what are the voluntary actions ...
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Where are interneurons in Autonomic Nervous System?

According to the following, it implies that preganglionic neurons are interneurons. Interneuron called preganglionic neuron whose cell body is situated in the "intermediolateral" column of spinal ...
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Pee Shiver: Any reliable research about this phenomenon?

I came across 2 webpages about the science of pee shiver. Link 1 Link 2 I wonder if there any reliable scientific research about this phenomenon. The 2 webpages I have hyperlinked attribute this to ...
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Why should we preceed neostigmine by atropine in tubocurarine toxicity?

Why should we precede neostigmine by atropine in tubocurarine toxicity ? I know that neostigmine act as anticholinesterase thus increasing the number of Ach molecules rendering them able to displace ...
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What drives max heart rate on beta blockers?

In a healthy human being, the increase in heart rate from rest to around 100 to 110 beats per minute at low intensity exercise is due to withdrawal of the parasympathetic nervous system's influence. ...
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To what extent is excretory control a learned vs. instinctive behavior?

Human babies are clearly not born knowing whether/how to hold in urine and feces, and teaching them to do so requires a nontrivial (really nontrivial...) amount of work on the parents' part. But once ...
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what is meta-sympathetic nervous system?

I always knew about the sympathetic and para-sympathetic nervous systems, and today I was told about the meta-sympathetic nervous system, but I didn't understand well the man who told me about it and ...
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Why do typical acetylcholinesterase inhibitors (like carbamates) have a greater parasympathetic effect than a sympathetic effect?

I understand that the post-ganglionic neurones of the sympathetic system are adrenergic, but surely these neurones will be excited to the same extent as the parasympathetic post-ganglionic neurones (...
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Are the sympathetic and parasympathetic nervous systems exact opposites?

Suppose mechanism existed that could block function of the PNS. Would this just mean then the sympathetic nervous system would become overly active? Do the sympathetic and parasympathetic systems ...
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What neuro-motor diseases cause the lower esophageal sphincter (LES) to malfunction?

Please note: This question is neither homework nor seeking medical advice. I'm simply asking for a factual, objective, biological explanation of the various neuro-motor diseases/illnesses that can act ...
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Is the autonomic nervous system only activated by internal stimuli?

My professor claims that the autonomic nervous system is only activated by stimuli from organs but I really feel like I've read that it can be activated by outside stimuli, although I'm not sure what ...
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Why is there only adrenoreceptors and no active adrenergic innervation in bronchus and uterus?

Our bronchus and uterus has beta adrenoreceptors, but they have no active sympathetic nervous system innervation in these organs. Was there a sympathetic innervation in trachea and uterus, earlier, ...
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Why does anxiety cause diarrhea or constipation?

Anxiety sometimes cause diarrhea, sometimes constipation, and sometimes both. It's interesting because it seems their underlying neurophysiology is somehow different. What are underlying physiological ...
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Differentiation of norepinephrine and epinephrine in indications

Norepinephrine is less beta2 adrenomimetic than epinephrine so more selective so less bronchospasm so may be therofore better in treatment of cardiac failure and different shocks. However, I am not ...
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330 views

Salbutamol's Pathways of Interaction and Classification

Salbutamol is a very commonly used direct-acting β2-agonist. This suggests me that it is sympatholytic. However, it has sympathomimetic pathways, see PubChem for Sympathomimetic. I am trying to ...
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What is the cause of dry cough?

I first thought this question in the case of the cause of dry throat after 3-day recovery of dry cough? but then I realised that the cause of dry cough can be a general thing. Assume the person ...
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419 views

Can Serous inflammation on pleura pulmonalis cause dry cough and runny nouse?

I am interested in the mechanism between the dry cough and runny nose (serous inflammation) here. I started to think how Acute respiratory viral infection is causing the dry cough. The serous ...
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Parallel Autonomic regulation of Cough and Runny Nose

I describe here the serous inflammation of runny nose. Cough is mediated by Cough center. I think Runny nose is also controlled by the autonomic nervous system and probably by some reflex. Assume ...
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What is the nature of action potentials in autonomic nervous system?

My conjecture is that the natures of sympathetic and parasympathetic action potentials are different. My findings propose me that sympathetic action potential is little longer lasting than ...