Pupil fails to dilate by giving cocaine in –
Correct Answer: Peripheral sympathetic paralysis.
Description: In periphery cocaine blocks the uptake of Adrenaline and Noradrenaline in Adrenergic nerve ending resulting in higher concentration of sympathetic neurotransmitters (Sympathomimetic effect) :
The peripheral sympathomimetic action of cocaine produces following effect :
Mydriasis
Rise in B.P.
Local vasoconstriction
Tachycardia
Therefore if the peripheral sympathetic system is paralysed it will lead to reverse of the above mentioned actions.
Category:
Anaesthesia
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now