What is the main action of lidocaine when used as a local anaesthetic in an animal?
Correct answer: C. Block voltage-gated sodium channels
- A. Inhibit calcium absorption in bone
- B. Activate opioid receptors in the brain
- C. Block voltage-gated sodium channels
- D. Stimulate acetylcholine release
Explanation
Lidocaine blocks voltage-gated sodium channels in nerve membranes, preventing generation and propagation of action potentials. It does not produce local anaesthesia by activating opioid receptors or stimulating acetylcholine release.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Veterinary Medicine
Covers the recognition, diagnosis, prevention and medical treatment of diseases affecting domestic animals, including infectious, metabolic, nutritional, toxic and organ-system disorders. It links history taking, physical examination, clinical signs, laboratory findings and differential diagnosis with appropriate therapy and herd or flock control.
Practise Veterinary Medicine
59 free Veterinary Medicine MCQs from Veterinary Science, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Veterinary Science questions like this
Veterinary Science is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Veterinary Medicine questions
Which tissue forms the first soft callus during secondary healing of a fractured bone?
Which finding is classically associated with rabies in nervous tissue?
What is the usual immediate treatment for a recumbent cow with clinical milk fever?
Which organism commonly serves as the intermediate host for Fasciola hepatica?
Which bacterium is the usual cause of contagious abortion in cattle known as bovine brucellosis?
Which drug is used to control the muscarinic signs of organophosphate poisoning in an animal?