Explain parasympathetic nerves system, Science

Assignment Help:

Explain parasympathetic Nerves System

Another system that runs parallel to the sympathetic system is termed as the parasympathetic system. This system has an effect just opposite to the sympathetic system. It relaxes the heart, decreases the heart rate (negative chronotropic), the force of contraction (negative inotropic), the conduction rate (negative dromotropic) and the excitability of tissue (negative bathmotropic). The nerves that supply the heart's atria are termed as vagi (singular vagus). As the name suggests, vagus is a vagabond, a wanderer charting an unfamiliar, vague course supplying the digestive tract, heart, the voice box etc. The heart is supplied by the right and left vagi. The peculiarity is that they do not supply the ventricles. The sympathetic system only supplies the ventricles. Overall, we have seen that the heart hangs in a balance of positive and negative forces: the sympathetic and parasympathetic system. Now you know the mechanism that may be operating when our yogis increase their heart rate or stop it! The sympathetic nerves have a chemical neurotransmitter called nor-adrenaline, whereas, the parasympathetic nerves release acetylcholine at the postganglionic nerve endings.


Related Discussions:- Explain parasympathetic nerves system

CELLS, Are there living beings without cells?

Are there living beings without cells?

Measuring atmospheric pressure with a bicycle pump, Measuring atmospheric p...

Measuring atmospheric pressure with a bicycle pump A bicycle pump with the washer reversed as represents can be used to calculate atmospheric pres- sure. The piston can be made

Science project, i dont know how to set up my science board

i dont know how to set up my science board

People, where did people come from

where did people come from

Diabetes mellitus, life style modification in management of diabetes?

life style modification in management of diabetes?

Lab hygiene hygiene, Lab hygiene : The need for continuous attention to hy...

Lab hygiene : The need for continuous attention to hygiene in any type of laboratory cannot be overemphasised. Any spillage of chemicals, battery acid, blood, plasma, serum, etc.

Explain what diffusion is, Explain what Diffusion is? Diffusion, we lea...

Explain what Diffusion is? Diffusion, we learnt is a simple process of movement of individual molecules from one region to another. Figure illustrates passive transport where m

Thermal veiocity, what is thermal velocity ofa material..

what is thermal velocity ofa material..

Assign wk3, Briefly explain why it is important to reinforce alternatives t...

Briefly explain why it is important to reinforce alternatives to problem behavior when using a punishment procedure. Give one example of the use of both a punishment procedure

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd