Final answer:
The local anesthetic agent that can last up to 10 hours is bupivacaine. It's commonly used in surgical procedures for its long-lasting sensory and motor paralysis effects. Such agents must be administered professionally for safety.
Step-by-step explanation:
A local anesthetic agent known for its long-lasting effects, up to 10 hours, is bupivacaine. Local anesthetics work by blocking nerve conduction when applied to nerve tissue, which can affect any part of the nervous system and all types of nerve fibers. The action of these drugs is reversible, which means nerve function is completely recovered after the effects of the anesthetic wear off.
Bupivacaine is often used for surgical procedures and can provide both sensory and motor paralysis in the area innervated, allowing for pain-free surgery. Its chemical structure and properties make it suitable for producing prolonged anesthesia. However, all anesthetic agents should be administered by a skilled professional to ensure safety and effectiveness.