APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Parasympathetic nerves supply every major organ system associated with allergy and inflammation including muscle, glands and inflammatory cells. Thus, they are capa-ble of inducing and modulating smooth muscle dysfunction or increased contraction, and increased mucus secretion.

Detailed explanation-2: -So, the correct option is ‘Dilation of pupil’.

Detailed explanation-3: -Stimulation of the parasympathetic will cause the detrusor muscle (urinary bladder wall) to contract and simultaneously relax the internal sphincter muscle between the bladder and the urethra, allowing the bladder to void.

Detailed explanation-4: -In the heart, parasympathetic stimulation of M2 receptors causes decreased heart rate and velocity of conduction through the AV node. In the vasculature, parasympathetic stimulation of M3 receptors leads to vasodilation. In the lungs, parasympathetic stimulation of M3 receptors leads to bronchoconstriction.