Question

What can the sympathetic division do that the parasympathetic cannot? Why is this the case?

What makes reflexes different in the ANS?

What is cholinergic receptors? A nicotine?

Answer 1

Sympthatic division means we are inactivating sympthatic system due to which the balance between parasympathetic and sympthatic disturb.the parasympathetic activity will increase and vice versa.

But there is one thing imoortaim.there are no parasympathetic fibres to ventricles of heart.but sympthatic fibres do innervate the ventricles of heart so when we cut sympthatic supply the force of contraction will decrease but if we cut parasympthatic supply there will be no change in force of contraction.however the heart rate will change.

The reflexes in ANS are differnt beacuse of the diffrent level of spinal route .

Cholinergic receptors are the receptors where acetyl choline act.these are of two types

Muscarinic

Nicotinic

Nicotine is the ingredient of tobacco.nicotinic receptors are characterised by their interaction with nicotine in tobacco.nicotimic receptors are ligand gated ion channels that form pores in the plasma membrane meditating fast signal transmission at synapses