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

Marshall Island Restoration Plan, What is necessary to restore the Marshall...

What is necessary to restore the Marshall wetland in Margibi County, Liberia? The Marshall wetland has several features , including mangrove swamp, which is being degraded in some

Oxidising substances , Oxidising Substances : It includes oxidising substa...

Oxidising Substances : It includes oxidising substances and the organic peroxides. Oxidising substances are by themselves not combustible but by feeding oxygen to other substances

Properties of a beating heart - cardiovascular system, Properties of a Beat...

Properties of a Beating Heart Heart Let us study a few interesting properties of a beating heart which make it such a unique organ. 1. Automaticity 2. Rhythmicity 3. L

Explain genetic theory of ageing, Explain Genetic Theory of ageing Rate...

Explain Genetic Theory of ageing Rate of ageing varies between species. The difference is in the genetic changes in the species. Thus it can be said that gradual impairment of

Environment and waste minimisation, Environment and Waste Minimisation   ...

Environment and Waste Minimisation   Your first assessment will cover the design of a monolith reactor for the VOCs removal. Therefore, you are asked to do the following:

Kangaroo, i wants to know about kangaroo because my teacher give me an assi...

i wants to know about kangaroo because my teacher give me an assignment so for that i wants to know everything about kangaroo

Test for studying suitable chemical treatment, Test for studying suitable c...

Test for studying suitable chemical treatment for changing the chemical nature of iodine Reactivity of iodine is tested with 1.  Water and, 2.  Sodium thiosulphate soluti

Determine how nitrogen is useful in plant nutrients, Determine how nitrogen...

Determine how nitrogen is useful in plant nutrients The supply of nitrogen is related to carbohydrate utilisation. If nitrogen supply is insufficient, carbohydrates will be dep

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