I came across this question today, it says:
Nicotinic receptors stimulation is directly responsible for …....
I should fill the spaces by one of the following choices:
- Increasing the excitability of sympathetic postganglionic neurons.
- increasing the the force of stomach contraction.
- delaying the emptying of liquids from the stomach.
- decreasing the excitability of sympathetic postganglionic neurons.
The only article speaking about the nicotinic receptors in my physiology book says that they are cholinergic receptors found in the autonomic ganglia, i.e., they are found on the postganglionic neurons.
So when I tried to solve the question, I thought the upper three answers are correct. Specifically, because stimulating the receptors on the postganglionic neurons will increase their excitability, option 1 seems to make sense.
But if that postganglionic cell happen to be sympathetic it may provoke the emptying of the liquids from stomach to be delayed (choice 3)?
And, if it was parasympathetic the force of stomach contraction would also increase (choice 2)?
I am confused as all three answers 1) 2) and 3) seem to be correct and the question asks specifically for one correct answer. Could someone help me find the correct answer, but put simply please, as I'm just a first-year dental student.